ORCID Profile
0000-0001-7617-3889
Current Organisation
University of Queensland
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Geology | Geochronology And Isotope Geochemistry | Geochemistry | Extraterrestrial Geology | Isotope Geochemistry | Planetary Science (excl. Extraterrestrial Geology) | Geochronology | Ore Deposit Petrology | Mineralogy and Crystallography | Nanotechnology | Environmental Science and Management | Solid State Chemistry | Environmental Technologies | Astronomical Sciences Not Elsewhere Classified | Soil Chemistry | Synchrotrons; Accelerators; Instruments and Techniques | Natural Resource Management | Climatology (Incl. Palaeoclimatology) | Igneous and Metamorphic Petrology | Geochronology | Ore Deposit Petrology | Microbial Ecology | Nanotechnology | Astronomy And Astrophysics | Environmental Sciences Not Elsewhere Classified | Geochemistry not elsewhere classified | Geochemistry Not Elsewhere Classified |
ANZSRC Socio-Economic Objective (SEO)
Earth sciences | Expanding Knowledge in the Earth Sciences | Physical sciences | Scientific Instruments | Chemical sciences | Scientific instrumentation | Land and water management | Physical and Chemical Conditions of Water not elsewhere classified | Emerging Defence Technologies | Climate variability | Climate change | Rehabilitation of Degraded Mining Environments | Expanding Knowledge in the Physical Sciences | Precious (Noble) Metal Ore Exploration | Integrated Systems | Other
Related Links
Publications
The Mesozoic terrane boundary beneath the Taupo Volcanic Zone, New Zealand, and potential controls on geothermal system characteristics
Publisher: Informa UK Limited
Date: 23-09-2020
Experimental constraints on hydrogen diffusion in garnet
Publisher: Springer Science and Business Media LLC
Date: 11-08-2018
Mylonites of the South Armorican Shear Zone: Insights for crustal-scale fluid flow and water–rock interaction processes
Publisher: Elsevier BV
Date: 05-2012
Quadruple sulfur isotopic fractionation during pyrite desulfidation to pyrrhotite
Publisher: Elsevier BV
Date: 03-2020
Rare earth element abundances in presolar SiC
Publisher: Elsevier BV
Date: 2018
A Model Earth-sized Planet in the Habitable Zone of α Centauri A/B
Publisher: American Astronomical Society
Date: 03-2022
Abstract: The bulk chemical composition and interior structure of rocky exoplanets are fundamentally important to understand their long-term evolution and potential habitability. Observations of the chemical compositions of solar system rocky bodies and of other planetary systems have increasingly shown a concordant picture that the chemical composition of rocky planets reflects that of their host stars for refractory elements, whereas this expression breaks down for volatiles. This behavior is explained by devolatilization during planetary formation and early evolution. Here we apply a devolatilization model calibrated with solar system bodies to the chemical composition of our nearest Sun-like stars— α Centauri A and B—to estimate the bulk composition of any habitable-zone rocky planet in this binary system (“ α -Cen-Earth”). Through further modeling of likely planetary interiors and early atmospheres, we find that, compared to Earth, such a planet is expected to have (i) a reduced (primitive) mantle that is similarly dominated by silicates, albeit enriched in carbon-bearing species (graphite/diamond) (ii) a slightly larger iron core, with a core mass fraction of 38.4 − 5.1 + 4.7 wt% (see Earth’s 32.5 ± 0.3 wt%) (iii) an equivalent water-storage capacity and (iv) a CO 2 –CH 4 –H 2 O-dominated early atmosphere that resembles that of Archean Earth. Further taking into account its ∼25% lower intrinsic radiogenic heating from long-lived radionuclides, an ancient α -Cen-Earth (∼1.5–2.5 Gyr older than Earth) is expected to have less efficient mantle convection and planetary resurfacing, with a potentially prolonged history of stagnant-lid regimes.
The elemental abundances (with uncertainties) of the most Earth-like planet
Publisher: Elsevier BV
Date: 2018
The sign of Δ33S is independent of pyrite morphology
Publisher: Elsevier BV
Date: 2020
Zircon U–Pb, O, and Hf isotopic constraints on Mesozoic magmatism in the Cyclades, Aegean Sea, Greece
Publisher: Springer Science and Business Media LLC
Date: 17-08-2014
U-Pb geochronology of Permian plutonic rocks, Longwood Range, New Zealand: Implications for Median Batholith-Brook Street Terrane relations
Publisher: Informa UK Limited
Date: 02-01-2014
Thermal history of Early Jurassic eclogite facies metamorphism in the Nagaland Ophiolite Complex, NE India: New insights into pre-Cretaceous subduction channel tectonics within the Neo-Tethys
Publisher: Elsevier BV
Date: 11-2019
Cretaceous molybdenite in metasomatic epidosite associated with the Pounamu ophiolite, New Zealand
Publisher: Informa UK Limited
Date: 14-11-2020
New Perspectives on the Bishop Tuff from Zircon Textures, Ages and Trace Elements
Publisher: Oxford University Press (OUP)
Date: 19-12-2013
Oxygen isotope tracing of the Solar System
Publisher: Informa UK Limited
Date: 03-2012
Geological and chronological evidence of Indo-Chinese strike-slip movement in the Altyn Tagh fault zone
Publisher: Science China Press., Co. Ltd.
Date: 2002
DOI: 10.1360/02TB9005
Deconvolving episodic age spectra from zircons of the Ladakh Batholith, northwest Indian Himalaya
Publisher: Elsevier BV
Date: 10-2011
Low δ18O zircons, U-Pb dating, and the age of the Qinglongshan oxygen and hydrogen isotope anomaly near Donghai in Jiangsu Province, China
Publisher: Elsevier BV
Date: 06-2002
Ryugu: A brand-new planetary sample returned from a C-type asteroid
Publisher: Research Square Platform LLC
Date: 21-06-2021
DOI: 10.21203/RS.3.RS-608561/V1
Abstract: C-type asteroids are considered to be primitive small Solar-System bodies enriched in water and organics, providing clues for understanding the origin and evolution of the Solar System and the building blocks of life. C-type asteroid 162173 Ryugu has been characterized by remote sensing and on-asteroid measurements with Hayabusa2, but further studies are expected by direct analyses of returned s les. Here we describe the bulk s le mainly consisting of rugged and smooth particles of millimeter to submillimeter size, preserving physical and chemical properties as they were on the asteroid. The particle size distribution is found steeper than that of surface boulders11. Estimated grain densities of the s les have a peak around 1350 kg m-3, which is lower than that of meteorites suggests a high micro-porosity down to millimeter-scale, as estimated at centimeter-scale by thermal measurements. The extremely dark optical to near-infrared reflectance and the spectral profile with weak absorptions at 2.7 and 3.4 microns implying carbonaceous composition with indigenous aqueous alteration, respectively, match the global average of Ryugu, confirming the s le’s representativeness. Together with the absence of chondrule and Ca-Al-rich inclusion of larger than sub-mm, these features indicate Ryugu is most similar to CI chondrites but with darker, more porous and fragile characteristics.
Comment and Reply on Age constraints on metamorphism and the development of a metamorphic core complex in Fiordland, southern New Zealand
Publisher: Geological Society of America
Date: 1989
The formation mechanisms of sedimentary pyrite nodules determined by trace element and sulfur isotope microanalysis
Publisher: Elsevier BV
Date: 08-2019
Preliminary analysis of the Hayabusa2 samples returned from C-type asteroid Ryugu
Publisher: Springer Science and Business Media LLC
Date: 20-12-2021
DOI: 10.1038/S41550-021-01550-6
Abstract: C-type asteroids 1 are considered to be primitive small Solar System bodies enriched in water and organics, providing clues to the origin and evolution of the Solar System and the building blocks of life. C-type asteroid 162173 Ryugu has been characterized by remote sensing 2–7 and on-asteroid measurements 8,9 with Hayabusa2 (ref. 10 ). However, the ground truth provided by laboratory analysis of returned s les is invaluable to determine the fine properties of asteroids and other planetary bodies. We report preliminary results of analyses on returned s les from Ryugu of the particle size distribution, density and porosity, spectral properties and textural properties, and the results of a search for Ca–Al-rich inclusions (CAIs) and chondrules. The bulk s le mainly consists of rugged and smooth particles of millimetre to submillimetre size, confirming that the physical and chemical properties were not altered during the return from the asteroid. The power index of its size distribution is shallower than that of the surface boulder observed on Ryugu 11 , indicating differences in the returned Ryugu s les. The average of the estimated bulk densities of Ryugu s le particles is 1,282 ± 231 kg m −3 , which is lower than that of meteorites 12 , suggesting a high microporosity down to the millimetre scale, extending centimetre-scale estimates from thermal measurements 5,9 . The extremely dark optical to near-infrared reflectance and spectral profile with weak absorptions at 2.7 and 3.4 μm imply a carbonaceous composition with indigenous aqueous alteration, matching the global average of Ryugu 3,4 and confirming that the s le is representative of the asteroid. Together with the absence of submillimetre CAIs and chondrules, these features indicate that Ryugu is most similar to CI chondrites but has lower albedo, higher porosity and more fragile characteristics.
Oxygen Isotopes and Sampling of the Solar System
Publisher: Springer Science and Business Media LLC
Date: 03-2020
Inverted Oligo-Miocene metamorphism in the Lesser Himalaya Sequence, Arunachal Pradesh, India; age and grade relationships
Publisher: Wiley
Date: 11-07-2016
DOI: 10.1111/JMG.12202
Neutron Activation Analysis of a Particle Returned from Asteroid Itokawa
Publisher: American Association for the Advancement of Science (AAAS)
Date: 26-08-2011
Abstract: Laboratory analysis of s les returned from an asteroid establishes a direct link between asteroids and meteorites and provides clues to the complex history of the asteroid and its surface.
Craters, boulders and regolith of (101955) Bennu indicative of an old and dynamic surface
Publisher: Springer Science and Business Media LLC
Date: 19-03-2019
Shape of (101955) Bennu indicative of a rubble pile with internal stiffness
Publisher: Springer Science and Business Media LLC
Date: 19-03-2019
Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu
Publisher: American Astronomical Society
Date: 04-2023
Abstract: Rock fragments of the Cb-type asteroid Ryugu returned to Earth by the JAXA Hayabusa2 mission share mineralogical, chemical, and isotopic properties with the Ivuna-type (CI) carbonaceous chondrites. Similar to CI chondrites, these fragments underwent extensive aqueous alteration and consist predominantly of hydrous minerals likely formed in the presence of liquid water on the Ryugu parent asteroid. Here we present an in situ analytical survey performed by secondary ion mass spectrometry from which we have estimated the D/H ratio of Ryugu’s hydrous minerals, D/H Ryugu , to be [165 ± 19] × 10 −6 , which corresponds to δ D Ryugu = +59 ± 121‰ (2 σ ). The hydrous mineral D/H Ryugu ’s values for the two s ling sites on Ryugu are similar they are also similar to the estimated D/H ratio of hydrous minerals in the CI chondrites Orgueil and Alais. This result reinforces a link between Ryugu and CI chondrites and an inference that Ryugu’s s les, which avoided terrestrial contamination, are our best proxy to estimate the composition of water at the origin of hydrous minerals in CI-like material. Based on this data and recent literature studies, the contribution of CI chondrites to the hydrogen of Earth’s surficial reservoirs is evaluated to be ∼3%. We conclude that the water responsible for the alteration of Ryugu’s rocks was derived from water ice precursors inherited from the interstellar medium the ice partially re-equilibrated its hydrogen with the nebular H 2 before being accreted on the Ryugu’s parent asteroid.
High-uranium matrix effect in zircon and its implications for SHRIMP U-Pb age determinations
Publisher: Elsevier BV
Date: 05-2012
Unsupported radiogenic Pb in zircon: a cause of anomalously high Pb-Pb, U-Pb and Th-Pb ages
Publisher: Springer Science and Business Media LLC
Date: 1984
DOI: 10.1007/BF00376756
Post-supereruption Magmatic Reconstruction of Taupo Volcano (New Zealand), as Reflected in Zircon Ages and Trace Elements
Publisher: Oxford University Press (OUP)
Date: 14-07-2014
Zircon U-Pb sensitive high mass-resolution ion microprobe dating of granitoids in the Ryoke metamorphic belt, Kinki district, Southwest Japan
Publisher: Wiley
Date: 03-2000
The age of (a tiny part of) the Australian continent
Publisher: Springer Science and Business Media LLC
Date: 10-1985
DOI: 10.1038/317559C0
Provenance of Cambrian conglomerates from New Zealand: implications for the tectonomagmatic evolution of the SE Gondwana margin
Publisher: Geological Society of London
Date: 12-2006
U/Pb zircon ages constrain the architecture of the ultrahigh-pressure Qinling-Dabie Orogen, China
Publisher: Elsevier BV
Date: 09-1998
New U Pb, Hf and O isotope constraints on the provenance of sediments from the Adelaide Rift Complex – Documenting the key Neoproterozoic to early Cambrian succession
Publisher: Elsevier BV
Date: 07-2020
A Global Fireball Observatory
Publisher: Elsevier BV
Date: 10-2020
Preservation of a fragmented late Neoproterozoic-earliest Cambrian hyper-extended continental-margin sequence in the Australian Delamerian Orogen
Publisher: Geological Society of London
Date: 2015
DOI: 10.1144/SP413.8
Pyrite trace-element and sulfur isotope geochemistry of paleo-mesoproterozoic McArthur Basin: Proxy for oxidative weathering
Publisher: Mineralogical Society of America
Date: 09-2019
DOI: 10.2138/AM-2019-6873
Abstract: Redox-sensitive trace elements and sulfur isotope compositions obtained via in situ analyses of sedimentary pyrites from marine black shales are used to track atmosphere-ocean redox conditions between ∼1730 and ∼1360 Ma in the McArthur Basin, northern Australia. Three black shale formations within the basin (Wollogorang Formation 1730 ± 3 Ma, Barney Creek Formation 1640 ± 3 Ma, and Upper Velkerri Formation 1361 ± 21 Ma) display systematic stratigraphic variations in pyrite trace-element compositions obtained using LA-ICP-MS. The concentrations of several trace elements and their ratios, such as Se, Zn, Se/Co, Ni/Co, Zn/Co, Mo/Co, Se/Bi, Zn/Bi, Ni/Bi, increase from the stratigraphically lower Wollogorang Formation to the Upper Velkerri Formation. Cobalt, Bi, Mo, Cu, and Tl show a consistent decrease in abundance while Ni, As, and Pb show no obvious trends. We interpret these trace element trends as a response to the gradual increase of oxygen in the atmosphere-ocean system from ∼1730 to 1360 Ma. Elements more mobile during erosion under rising atmospheric oxygen show an increase up stratigraphy (e.g., Zn, Se), whereas elements that are less mobile show a decrease (e.g., Co, Bi). We also propose the increase of elemental ratios (Se/Co, Ni/Co, Zn/Co, Mo/Co, Ni/Bi, and Zn/Bi) up stratigraphy are strong indicators of atmospheric oxygenation. Sulfur isotopic compositions of marine pyrite (δ34Spyrite) from these formations, obtained using SHRIMP-SI, are highly variable, with the Wollogorang Formation exhibiting less variation (δ34S = –29.4 to +9.5‰ mean –5.03‰) in comparison to the Barney Creek (δ34S = –13.8 to +41.8‰ mean +19.88‰) and Velkerri Formations (δ34S = –14.2 to +52.8‰ mean +26.9‰). We propose that the shift in mean δ34S to heavier values up-section corresponds to increasing deep water oxygenation from ∼1730 to 1360 Ma. Incursion of oxygenated waters possibly caused a decrease in the areal extent of anoxic areas, at the same time, creating a possibly efficient reducing system. A stronger reducing system caused the δ34S of the sedimentary pyrites to become progressively heavier. Interestingly, heavy δ34S in pyrites overlaps with the increase in the concentration of certain trace elements (and their ratios) in sedimentary pyrites (Se, Zn, Se/Co, Ni/Co, Zn/Co, Mo/Co, Ni/Bi, and Zn/Bi). This study concludes that there was a gradual increase of atmospheric oxygen accompanied by ocean oxygenation through the first ∼400 million years of the Boring Billion (1800–1400 Ma) in the McArthur Basin.
Zircon in amphibolites from Naxos, Aegean Sea, Greece: origin, significance and tectonic setting
Publisher: Wiley
Date: 26-12-2017
DOI: 10.1111/JMG.12238
Samples returned from the asteroid Ryugu are similar to Ivuna-type carbonaceous meteorites
Publisher: American Association for the Advancement of Science (AAAS)
Date: 24-02-2023
Abstract: Carbonaceous meteorites are thought to be fragments of C-type (carbonaceous) asteroids. S les of the C-type asteroid (162173) Ryugu were retrieved by the Hayabusa2 spacecraft. We measured the mineralogy and bulk chemical and isotopic compositions of Ryugu s les. The s les are mainly composed of materials similar to those of carbonaceous chondrite meteorites, particularly the CI (Ivuna-type) group. The s les consist predominantly of minerals formed in aqueous fluid on a parent planetesimal. The primary minerals were altered by fluids at a temperature of 37° ± 10°C, about 5.2 − 0.7 + 0.8 million (statistical) or 5.2 − 2.1 + 1.6 million (systematic) years after the formation of the first solids in the Solar System. After aqueous alteration, the Ryugu s les were likely never heated above ~100°C. The s les have a chemical composition that more closely resembles that of the Sun’s photosphere than other natural s les do.
Loch Burn Formation, Fiordland, New Zealand: SHRIMP U‐Pb ages, geochemistry and provenance
Publisher: Informa UK Limited
Date: 09-2007
Mn-Cr relative sensitivity Factors for Secondary Ion Mass Spectrometry analysis of Mg-Fe-Ca olivine and implications for the Mn-Cr chronology of meteorites
Publisher: Elsevier BV
Date: 06-2013
Tracking the evolution of Late Mesozoic arc-related magmatic systems in Hong Kong using in-situ U-Pb dating and trace element analyses in zircon
Publisher: Mineralogical Society of America
Date: 11-2017
DOI: 10.2138/AM-2017-6071
The Paleozoic-Mesozoic recycling of the Rakaia Terrane, South Island, New Zealand: sandstone clast and sandstone petrology, geochemistry, and geochronology
Publisher: Informa UK Limited
Date: 06-2005
Trace element content of pyrite from the Kapai slate, St. Ives gold district, Western Australia
Publisher: Society of Economic Geologists
Date: 17-06-2016
Constraints on the age of formation of seismically reflective middle and lower crust beneath the Bering Shelf: SHRIMP zircon dating of xenoliths from Saint Lawrence Island
Publisher: Geological Society of America
Date: 2002
Fractal-like R5 assembly promote the condensation of silicic acid into silica particles
Publisher: Elsevier BV
Date: 09-2021
Properties of rubble-pile asteroid (101955) Bennu from OSIRIS-REx imaging and thermal analysis
Publisher: Springer Science and Business Media LLC
Date: 19-03-2019
Globally asynchronous sulphur isotope signals require re-definition of the Great Oxidation Event
Publisher: Springer Science and Business Media LLC
Date: 08-06-2018
DOI: 10.1038/S41467-018-04621-X
Abstract: The Great Oxidation Event (GOE) has been defined as the time interval when sufficient atmospheric oxygen accumulated to prevent the generation and preservation of mass-independent fractionation of sulphur isotopes (MIF-S) in sedimentary rocks. Existing correlations suggest that the GOE was rapid and globally synchronous. Here we apply sulphur isotope analysis of diagenetic sulphides combined with U-Pb and Re-Os geochronology to document the sulphur cycle evolution in Western Australia spanning the GOE. Our data indicate that, from ~2.45 Gyr to beyond 2.31 Gyr, MIF-S was preserved in sulphides punctuated by several episodes of MIF-S disappearance. These results establish the MIF-S record as asynchronous between South Africa, North America and Australia, argue for regional-scale modulation of MIF-S memory effects due to oxidative weathering after the onset of the GOE, and suggest that the current paradigm of placing the GOE at 2.33–2.32 Ga based on the last occurrence of MIF-S in South Africa should be re-evaluated.
No mass-independent sulfur isotope fractionation in auriferous fluids supports a magmatic origin for Archean gold deposits
Publisher: Geological Society of America
Date: 07-2013
DOI: 10.1130/G34186.1
Geochronological constrains on the timing of magmatism, deformation and mineralization at the Karouni orogenic gold deposit: Guyana, South America
Publisher: Elsevier BV
Date: 02-2019
The Pounamu terrane, a new Cretaceous exotic terrane within the Alpine Schist, New Zealand tectonically emplaced, deformed and metamorphosed during collision of the LIP Hikurangi Plateau with Zealandia
Publisher: Elsevier BV
Date: 04-2015
New tools for isotopic analysis
Publisher: American Association for the Advancement of Science (AAAS)
Date: 17-12-1999
U–Pb dating of zircon in hydrothermally altered rocks of the Kawerau Geothermal Field, Taupo Volcanic Zone, New Zealand
Publisher: Elsevier BV
Date: 03-2013
The detrital zircon U–Pb–Hf fingerprint of the northern Arabian–Nubian Shield as reflected by a Late Ediacaran arkosic wedge (Zenifim Formation; subsurface Israel)
Publisher: Elsevier BV
Date: 09-2015
Magnesium in subaqueous speleothems as a potential palaeotemperature proxy
Publisher: Springer Science and Business Media LLC
Date: 06-10-2020
DOI: 10.1038/S41467-020-18083-7
Abstract: Few palaeoclimate archives beyond the polar regions preserve continuous and datable palaeotemperature proxy time series over multiple glacial-interglacial cycles. This h ers efforts to develop a more coherent picture of global patterns of past temperatures. Here we show that Mg concentrations in a subaqueous speleothem from an Italian cave track regional sea-surface temperatures over the last 350,000 years. The Mg shows higher values during warm climate intervals and converse patterns during cold climate stages. In contrast to previous studies, this implicates temperature, not rainfall, as the principal driver of Mg variability. The depositional setting of the speleothem gives rise to Mg partition coefficients that are more temperature dependent than other calcites, enabling the effect of temperature change on Mg partitioning to greatly exceed the effects of changes in source-water Mg/Ca. Subaqueous speleothems from similar deep-cave environments should be capable of providing palaeotemperature information over multiple glacial-interglacial cycles.
Provenance of the sedimentary Rakaia sub-terrane, Torlesse Terrane, South Island, New Zealand: The use of igneous clast compositions to define the source
Publisher: Elsevier BV
Date: 06-2004
Tectonic Evolution of the Western Margin of the Burma Microplate Based on New Fossil and Radiometric Age Constraints
Publisher: American Geophysical Union (AGU)
Date: 05-2019
DOI: 10.1029/2018TC005049
Autochthonous inheritance of zircon through Cretaceous partial melting of Carboniferous plutons: The Arthur River Complex, Fiordland, New Zealand
Publisher: Springer Science and Business Media LLC
Date: 08-06-2011
SHRIMP 4-S isotope systematics of two pyrite generations in the 3.49 Ga Dresser Formation
Publisher: European Association of Geochemistry
Date: 05-2021
The Paleoarchean Northern Mundo Novo Greenstone Belt, São Francisco Craton: Geochemistry, U–Pb–Hf–O in zircon and pyrite δ34S-Δ33S-Δ36S signatures
Publisher: Elsevier BV
Date: 08-2016
Initial 182Hf/180Hf in meteoritic zircons
Publisher: Elsevier BV
Date: 12-2003
The Solar System calcium isotopic composition inferred from Ryugu samples
Publisher: European Association of Geochemistry
Date: 10-2022
Oxygen in the sun
Publisher: Mineralogical Society of America
Date: 2008
Geochemical characteristics of pyrite in the Dabaozhuang deposit in the Middle-Lower Yangtze River Metallogenic Belt, Eastern China
Publisher: Elsevier BV
Date: 09-2020
Large heterogeneous 26Mg excesses in a hibonite from the Murchison meteorite
Publisher: Springer Science and Business Media LLC
Date: 06-1987
DOI: 10.1038/327689A0
The dynamic geophysical environment of (101955) Bennu based on OSIRIS-REx measurements
Publisher: Springer Science and Business Media LLC
Date: 19-03-2019
Oxygen Isotopic Compositions of Asteroidal Materials Returned from Itokawa by the Hayabusa Mission
Publisher: American Association for the Advancement of Science (AAAS)
Date: 26-08-2011
Abstract: Laboratory analysis of s les returned from an asteroid establishes a direct link between asteroids and meteorites and provides clues to the complex history of the asteroid and its surface.
Palaeoarchaean materials in the Tibetan Plateau indicated by zircon
Publisher: Informa UK Limited
Date: 29-08-2018
Geochronology and geochemistry of a Mesozoic magmatic arc system, Fiordland, New Zealand
Publisher: Geological Society of London
Date: 11-1998
Direct dating of podiform Chromitite: U-Pb (Zircon, Rutile) and 40Ar/39Ar (Pargasite) evidence from Tiébaghi Cr deposit (New Caledonia)
Publisher: Elsevier BV
Date: 06-2022
Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth
Publisher: American Association for the Advancement of Science (AAAS)
Date: 04-03-2022
Abstract: The Hayabusa2 spacecraft investigated the C-type (carbonaceous) asteroid (162173) Ryugu. The mission performed two landing operations to collect s les of surface and subsurface material, the latter exposed by an artificial impact. We present images of the second touchdown site, finding that ejecta from the impact crater was present at the s le location. Surface pebbles at both landing sites show morphological variations ranging from rugged to smooth, similar to Ryugu’s boulders, and shapes from quasi-spherical to flattened. The s les were returned to Earth on 6 December 2020. We describe the morphology of grams of returned pebbles and sand. Their erse color, shape, and structure are consistent with the observed materials of Ryugu we conclude that they are a representative s le of the asteroid.
Enhanced constraints on the interior composition and structure of terrestrial exoplanets
Publisher: Oxford University Press (OUP)
Date: 11-10-2019
Simultaneous resetting of the muscovite K-Ar and monazite U-Pb geochronometers: a story of fluids
Publisher: Wiley
Date: 15-09-2011
Multiple sulfur isotope analyses support a magmatic model for the volcanogenic massive sulfide deposits of the Teutonic Bore volcanic Complex, Yilgarn Craton, Western Australia
Publisher: Society of Economic Geologists
Date: 13-07-2015
Irradiation History of Itokawa Regolith Material Deduced from Noble Gases in the Hayabusa Samples
Publisher: American Association for the Advancement of Science (AAAS)
Date: 26-08-2011
Abstract: Laboratory analysis of s les returned from an asteroid establishes a direct link between asteroids and meteorites and provides clues to the complex history of the asteroid and its surface.
Structure and evolution of the Wairakei–Tauhara geothermal system (Taupo Volcanic Zone, New Zealand) revisited with a new zircon geochronology
Publisher: Elsevier BV
Date: 2020
Tungsten isotopic compositions in stardust sic grains from the murchison meteorite: Constraints on the s-process in the Hf-Ta-W-Re-Os region
Publisher: American Astronomical Society
Date: 13-12-2012
Determining high precision, in situ, oxygen isotope ratios with a SHRIMP II: Analyses of MPI-DING silicate-glass reference materials and zircon from contrasting granites
Publisher: Elsevier BV
Date: 11-2008
Atmospheric and hydrothermal sulfur isotope signatures recorded in Neoarchean deep marine sedimentary pyrites from the Yilgarn Craton, Western Australia
Publisher: Elsevier BV
Date: 04-2022
Exploring the efficiency of stepwise dissolution in removal of stubborn non-radiogenic Pb in chondrule U-Pb dating
Publisher: Elsevier BV
Date: 05-2020
In-situ quadruple sulfur isotopic compositions of pyrites in the ca. 3.2–2.72 Ga metasedimentary rocks from the Pilbara Craton, Western Australia
Publisher: Elsevier BV
Date: 12-2020
Is the switch from I- to S-type magmatism in the Himalayan Orogen indicative of the collision of India and Eurasia?
Publisher: Informa UK Limited
Date: 04-2012
Provenance connections between late Neoproterozoic and early Palaeozoic sedimentary basins of the Ross Sea region, Antarctica, south-east Australia and southern Zealandia
Publisher: Cambridge University Press (CUP)
Date: 18-07-2013
DOI: 10.1017/S0954102013000461
Abstract: Thick successions of turbidites are widespread in the Ross–Delamerian and Lachlan orogens and are now dispersed through Australia, Antarctica and New Zealand. U-Pb detrital zircon age patterns for latest Precambrian, Cambrian and Ordovician metagreywackes show a closely related provenance. The latest Neoproterozoic–early Palaeozoic sedimentary rocks have major components, at c. 525, 550, and 595 Ma, i.e. about 40–80 million years older than deposition. Zircons in these components increase from the Neoproterozoic to Ordovician. Late Mesoproterozoic age components, 1030 and 1070 Ma, probably originate from igneous/metamorphic rocks in the Gondwanaland hinterland whose exact locations are unknown. Although small, the youngest zircon age components are coincident with estimated depositional ages suggesting that they reflect contemporaneous and minor, volcanic sources. Overall, the detrital zircon provenance patterns reflect the development of plutonic/metamorphic complexes of the Ross–Delamerian Orogen in the Transantarctic Mountains and southern Australia that, upon exhumation, supplied sediment to regional scale basin(s) at the Gondwana margin. Tasmanian detrital zircon age patterns differ from those seen in intra-Ross Orogen sandstones of northern Victoria Land and from the oldest metasediments in the Transantarctic Mountains. A comparison with rocks from the latter supports an allochthonous western Tasmania model and amalgamation with Australia in late Cambrian time.
Impact of arginine modified SNARE peptides on interactions with phospholipid bilayers and coiled-coil formation: A molecular dynamics study
Publisher: Elsevier BV
Date: 10-2022
Private psychiatry in Australia: reflections on career opportunities, benefits, and challenges
Publisher: SAGE Publications
Date: 12-01-2021
Abstract: To provide reflection on career opportunities, benefits and challenges, with regard to commencing private practice psychiatry in Australia. There are varied opportunities for a career in private practice psychiatry. Private practice has benefits and challenges, distinct from public sector psychiatry with moderately greater professional autonomy, facilitating the provision of expert mental healthcare for the community.
SW Pacific arc and backarc lavas and the role of slab-bend serpentinites in the global halogen cycle
Publisher: Elsevier BV
Date: 2020
The volatility trend of protosolar and terrestrial elemental abundances
Publisher: Elsevier BV
Date: 08-2019
Evidence for widespread hydrated minerals on asteroid (101955) Bennu
Publisher: Springer Science and Business Media LLC
Date: 19-03-2019
Halogens (F, Cl, Br, I) in Thirteen USGS, GSJ and NIST International Rock and Glass Reference Materials
Publisher: Wiley
Date: 05-07-2018
DOI: 10.1111/GGR.12229
Bad Hair Day: Some Mementos of New Comedy Refurbished
Publisher: Cambridge University Press (CUP)
Date: 11-2010
DOI: 10.1017/S0066477400002069
Abstract: Masks having a bad hair day? Two terracotta masks now in the Museum of Ancient Cultures, Macquarie University (figs 1-5), and the Classics Museum, Victoria University of Wellington (figs 9-12), seem to be in this embarrassing situation. Both of these tonsorially-challenged characters display highly unusual features (indeed the entire forehead of the male mask seems somewhat deformed) but a closer look suggests that in both cases their bad hair is the result of ‘t ering’ with classic mask representations or their moulds. That is to say, existing moulds have been modified and then brought back into use, or ex les of each mask-type have been used as the basis for new moulds. Furthermore, the changes can be shown to have occurred at a much later date than that of the original masks or moulds. These changes confuse the identity of the mask, suggesting that those responsible for their later production did not fully understand the original iconography. They are thus of interest as evidence for the later reuse of artefacts relating to theatre, though we suggest in our conclusion that, in spite of their theatrical derivation, their purchaser was not primarily interested in them as souvenirs of Greek drama.
Mesoarchaean clockwise metamorphic P-T path from the Western Dharwar Craton
Publisher: Elsevier BV
Date: 10-2019
Carbonated mantle domains at the base of the Earth's transition zone
Publisher: Elsevier BV
Date: 02-2018
Stratigraphy and structure of the Ngatamariki geothermal system from new zircon U–Pb geochronology: Implications for Taupo Volcanic Zone evolution
Publisher: Elsevier BV
Date: 03-2014
Mineralogical constraints on the thermal history of martian regolith breccia Northwest Africa 8114
Publisher: Elsevier BV
Date: 02-2019
Isotopic enhancements of 17O and 18O from solar wind particles in the lunar regolith
Publisher: Springer Science and Business Media LLC
Date: 04-2006
DOI: 10.1038/NATURE04611
Abstract: Differences in isotopic abundances between meteorites and rocks on Earth leave unclear the true composition of the gas out of which the Solar System formed. The Sun should have preserved in its outer layers the original composition, and recent work has indicated that the solar wind is enriched in 16O, relative to Earth, Mars and bulk meteorites. This suggests that self-shielding of CO due to photo-dissociation, which is a well understood process in molecular clouds, also led to evolution in the isotopic abundances in the early Solar System. Here we report measurements of oxygen isotopic abundances in lunar grains that were recently exposed to the solar wind. We find that 16O is underabundant, opposite to an earlier finding based on studies of ancient metal grains. Our result, however, is more difficult to understand within the context of current models, because there is no clear way to make 16O more abundant in Solar System rocks than in the Sun.
A re-evaluation of the Mn-Cr systematics of olivine from the angrite meteorite D'Orbigny using Secondary Ion Mass Spectrometry
Publisher: Elsevier BV
Date: 12-2013
U-Th-Pb zircon and monazite geochronology of Western Province gneissic rocks, central-south Westland, New Zealand
Publisher: Informa UK Limited
Date: 12-2010
Timing of deposition, orogenesis and glaciation within the Dalradian rocks of Scotland: Constraints from U-Pb zircon ages
Publisher: Geological Society of London
Date: 2002
Psychological Therapy for At Risk Mental State for Psychosis in a Prison Setting: A Case Study
Publisher: Wiley
Date: 22-12-2015
DOI: 10.1002/JCLP.22250
The Oxygen Isotopic Composition of Samples Returned from Asteroid Ryugu with Implications for the Nature of the Parent Planetesimal
Publisher: American Astronomical Society
Date: 08-2023
DOI: 10.3847/PSJ/ACEA62
Abstract: We present oxygen isotopic analyses of fragments of the near-Earth C b -type asteroid Ryugu returned by the Hayabusa2 spacecraft that reinforce the close correspondence between Ryugu and CI chondrites. Small differences between Ryugu s les and CI chondrites in Δ ′ 17 O can be explained at least in part by contamination of the latter by terrestrial water. The discovery that a randomly s led C-complex asteroid is composed of CI-chondrite-like rock, combined with thermal models for formation prior to significant decay of the short-lived radioisotope 26 Al, suggests that if lithified at the time of alteration, the parent body was small (≪50 km radius). If the parent planetesimal was large ( km in radius), it was likely composed of high-permeability, poorly lithified sediment rather than consolidated rock.
Charge-mode electrometer measurements of S-isotopic compositions on SHRIMP-SI
Publisher: Elsevier BV
Date: 02-2014
Best practices for the use of meteorite names in publications
Publisher: Wiley
Date: 21-04-2019
DOI: 10.1111/MAPS.13291
Microinclusions in monocrystalline octahedral diamonds and coated diamonds from Diavik, Slave Craton: Clues to diamond genesis
Publisher: Elsevier BV
Date: 11-2009
Age profile of ophiolitic rocks across the late palaeozoic new england orogen, new south wales: Implications for tectonic models
Publisher: Informa UK Limited
Date: 02-1995
A Comparison of Granite Genesis in the Adelaide Fold Belt and Glenelg River Complex Using U–Pb, Hf and O Isotopes in Zircon
Publisher: Oxford University Press (OUP)
Date: 11-10-2022
DOI: 10.1093/PETROLOGY/EGAC102
Abstract: We present new U–Pb ages and Hf and O isotope data for zircon from I-, S- and A-type granites from both the western and eastern edges of the Delamerian Orogen in southeastern Australia. The I-type Tanunda Creek Gneiss contains zircon populations of 507 ± 4 and 492 ± 6 Ma inferred to reflect igneous and metamorphic ages, respectively. The I-type Palmer Granite yielded an age of 509 ± 3 Ma, and the Port Elliot S-type Granite has a magmatic age of 508 ± 7 Ma. Inherited zircon in these granites range from 1092 to 3343 Ma, probably derived from assimilation of Adelaide Group sediments. The Murray Bridge A-type Granite is 490 ± 2 Ma in age and lacks inherited zircon. In the Glenelg River Complex, an S-type migmatite from near Harrow contains a complex zircon population. It is most likely ~500 Ma in age and has inherited zircon of 550–700, 1000–1100 and 2437 Ma, hence matching those from the Kanmantoo Group. From this and detrital zircon ages, we infer that only the Kanmantoo Group extends across the Murray Basin into the Glenelg River Complex. The Wando Tonalite and Loftus Creek I-type granites yielded ages of 501 ± 2 and 486 ± 3 Ma, respectively. Zircon from the Dergholm Granite has suffered Pb loss, and the best age estimate for this granite is 488 ± 5 Ma. Combining all the granite data together, εHft and δ18O in the magmatic zircon range from 5.6 to −10.3 and from 5.8 to 8.1, respectively, and are well correlated. The zircon indicates the same temporal and compositional evolution of granitic petrogenesis across ~300 km of strike, reaffirming the notion that these terranes form part of the same orogen. Westward-directed subduction caused orogenic thickening, heating and increasing amounts of crustal contribution. This was followed by convective thinning of the thickened mantle lithosphere and a return to more primitive magmas lacking significant crustal contributions. It contrasts significantly with inferred granite petrogenesis and tectonic style in the younger Lachlan and New England Fold Belts further east that were not built upon extended cratonic lithosphere.
Contribution of Ryugu-like material to Earth’s volatile inventory by Cu and Zn isotopic analysis
Publisher: Springer Science and Business Media LLC
Date: 12-12-2022
Origin of Lower Cretaceous (âNubianâ) sandstones of North-east Africa and Arabia from detrital zircon U-Pb SHRIMP dating
Publisher: Wiley
Date: 12-2009
The operational environment and rotational acceleration of asteroid (101955) Bennu from OSIRIS-REx observations
Publisher: Springer Science and Business Media LLC
Date: 19-03-2019
DOI: 10.1038/S41467-019-09213-X
Abstract: During its approach to asteroid (101955) Bennu, NASA’s Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) spacecraft surveyed Bennu’s immediate environment, photometric properties, and rotation state. Discovery of a dusty environment, a natural satellite, or unexpected asteroid characteristics would have had consequences for the mission’s safety and observation strategy. Here we show that spacecraft observations during this period were highly sensitive to satellites (sub-meter scale) but reveal none, although later navigational images indicate that further investigation is needed. We constrain average dust production in September 2018 from Bennu’s surface to an upper limit of 150 g s –1 averaged over 34 min. Bennu’s disk-integrated photometric phase function validates measurements from the pre-encounter astronomical c aign. We demonstrate that Bennu’s rotation rate is accelerating continuously at 3.63 ± 0.52 × 10 –6 degrees day –2 , likely due to the Yarkovsky–O’Keefe–Radzievskii–Paddack (YORP) effect, with evolutionary implications.
Tomato geranylgeranyl diphosphate synthase isoform 1 is involved in the stress‐triggered production of diterpenes in leaves and strigolactones in roots
Publisher: Wiley
Date: 28-06-2023
DOI: 10.1111/NPH.19109
Abstract: Carotenoids are photoprotectant pigments and precursors of hormones such as strigolactones (SL). Carotenoids are produced in plastids from geranylgeranyl diphosphate (GGPP), which is erted to the carotenoid pathway by phytoene synthase (PSY). In tomato ( Solanum lycopersicum ), three genes encode plastid‐targeted GGPP synthases ( SlG1 to SlG3 ) and three genes encode PSY isoforms ( PSY1 to PSY3 ). Here, we investigated the function of SlG1 by generating loss‐of‐function lines and combining their metabolic and physiological phenotyping with gene co‐expression and co‐immunoprecipitation analyses. Leaves and fruits of slg1 lines showed a wild‐type phenotype in terms of carotenoid accumulation, photosynthesis, and development under normal growth conditions. In response to bacterial infection, however, slg1 leaves produced lower levels of defensive GGPP‐derived diterpenoids. In roots, SlG1 was co‐expressed with PSY3 and other genes involved in SL production, and slg1 lines grown under phosphate starvation exuded less SLs. However, slg1 plants did not display the branched shoot phenotype observed in other SL‐defective mutants. At the protein level, SlG1 physically interacted with the root‐specific PSY3 isoform but not with PSY1 and PSY2. Our results confirm specific roles for SlG1 in producing GGPP for defensive diterpenoids in leaves and carotenoid‐derived SLs (in combination with PSY3) in roots.
Hydrothermal fluid characteristics and implications of the Makou IOA deposit in Luzong Basin, eastern China
Publisher: Elsevier BV
Date: 12-2020
First asteroid gas sample delivered by the Hayabusa2 mission: A treasure box from Ryugu.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 18-11-2022
Abstract: The Hayabusa2 spacecraft returned to Earth from the asteroid 162173 Ryugu on 6 December 2020. One day after the recovery, the gas species retained in the s le container were extracted and measured on-site and stored in gas collection bottles. The container gas consists of helium and neon with an extraterrestrial
Ancient structural inheritance explains gold deposit clustering in northern Perú
Publisher: Geological Society of America
Date: 27-07-2022
DOI: 10.1130/G50208.1
Abstract: The punctuated distribution of major gold deposits along orogenic belts is poorly understood. In northern Perú, gold deposits cluster along trends that transect the subparallel Phanerozoic belts that accreted onto the western margin of the Archean–Proterozoic Amazonian craton. This suggests the influence of as yet unrecognized pre-Andean basement structures in controlling the localization of Phanerozoic deposits. We report the newly discovered Tomac ophiolite, which represents a missing link in tracing a cryptic basement collisional suture striking obliquely to the Peruvian Andes. The Tomac ophiolite signals the opening of a former Neoproterozoic ocean basin between the Amazonian craton and a continental ribbon of dispersed microterranes. Re-accretion of the continental ribbon resulted in the formation of a collisional belt between ca. 465 and 440 Ma. Rifting and re-accretion occurred parallel to the strike of the ca. 1400–1000 Ma Grenvillian-Sunsás orogen, indicating that structural corridors that transect the Andes at an oblique strike angle reflect inheritance of preexisting lithospheric weak zones. Our study demonstrates that Phanerozoic gold deposits in northern Perú cluster at the intersection between the newly defined basement suture and the superimposed Andean belt and associated well-documented cross faults. Gold mineralization was localized at ancient structural intersections, where enhanced permeability facilitated anomalous energy and mass transfer, promoting major ore accumulation during episodes of accretion.
Reconnaissance Basement Geology and Tectonics of South Zealandia
Publisher: American Geophysical Union (AGU)
Date: 02-2019
DOI: 10.1029/2018TC005116
DNA storage in thermoresponsive microcapsules for repeated random multiplexed data access
Publisher: Springer Science and Business Media LLC
Date: 04-05-2023
DOI: 10.1038/S41565-023-01377-4
Abstract: DNA has emerged as an attractive medium for archival data storage due to its durability and high information density. Scalable parallel random access to information is a desirable property of any storage system. For DNA-based storage systems, however, this still needs to be robustly established. Here we report on a thermoconfined polymerase chain reaction, which enables multiplexed, repeated random access to compartmentalized DNA files. The strategy is based on localizing biotin-functionalized oligonucleotides inside thermoresponsive, semipermeable microcapsules. At low temperatures, microcapsules are permeable to enzymes, primers and lified products, whereas at high temperatures, membrane collapse prevents molecular crosstalk during lification. Our data show that the platform outperforms non-compartmentalized DNA storage compared with repeated random access and reduces lification bias tenfold during multiplex polymerase chain reaction. Using fluorescent sorting, we also demonstrate s le pooling and data retrieval by microcapsule barcoding. Therefore, the thermoresponsive microcapsule technology offers a scalable, sequence-agnostic approach for repeated random access to archival DNA files.
U-Pb, Th-Pb and Ar-Ar geochronology from the southern Sierras Pampeanas, Argentina: implications for the Palaeozoic tectonic evolution of the western Gondwana margin
Publisher: Geological Society of London
Date: 1998
A petrochronology window into near-surface fluid/rock interaction within Archaean ultramafic-mafic crust: Insights from the 3.25 Ga Stolzburg Complex, Barberton Greenstone Belt
Publisher: Elsevier BV
Date: 05-2021
The link between reduced porphyry copper deposits and oxidized magmas
Publisher: Elsevier BV
Date: 02-2013
Magnetite-hematite, oxygen fugacity, adakite and porphyry copper deposits: Reply to Richards
Publisher: Elsevier BV
Date: 02-2014
The genetic association between magnetite-hematite and porphyry copper deposits: Reply to Pokrovski
Publisher: Elsevier BV
Date: 02-2014
Publisher Correction: Craters, boulders and regolith of (101955) Bennu indicative of an old and dynamic surface
Publisher: Springer Science and Business Media LLC
Date: 04-04-2019
Isotopic records in CM hibonites: Implications for timescales of mixing of isotope reservoirs in the solar nebula
Publisher: Elsevier BV
Date: 09-2009
Impact of poly(ethylene glycol) functionalized lipids on ordering and fluidity of colloid supported lipid bilayers
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2SM00806H
Abstract: Colloid Supported lipid bilayer membrane fluidity is dependent on the amount of lipopolymers incorporated for stabilization. Beyond a threshold mol fraction of lipopolymers, lateral mobility is significantly reduced due to heterogeneity.
Presolar Stardust in Asteroid Ryugu
Publisher: American Astronomical Society
Date: 08-2022
Abstract: We have conducted a NanoSIMS-based search for presolar material in s les recently returned from C-type asteroid Ryugu as part of JAXA's Hayabusa2 mission. We report the detection of all major presolar grain types with O- and C-anomalous isotopic compositions typically identified in carbonaceous chondrite meteorites: 1 silicate, 1 oxide, 1 O-anomalous supernova grain of ambiguous phase, 38 SiC, and 16 carbonaceous grains. At least two of the carbonaceous grains are presolar graphites, whereas several grains with moderate C isotopic anomalies are probably organics. The presolar silicate was located in a clast with a less altered lithology than the typical extensively aqueously altered Ryugu matrix. The matrix-normalized presolar grain abundances in Ryugu are 4.8 − 2.6 + 4.7 ppm for O-anomalous grains, 25 − 5 + 6 ppm for SiC grains, and 11 − 3 + 5 ppm for carbonaceous grains. Ryugu is isotopically and petrologically similar to carbonaceous Ivuna-type (CI) chondrites. To compare the in situ presolar grain abundances of Ryugu with CI chondrites, we also mapped Ivuna and Orgueil s les and found a total of 15 SiC grains and 6 carbonaceous grains. No O-anomalous grains were detected. The matrix-normalized presolar grain abundances in the CI chondrites are similar to those in Ryugu: 23 − 6 + 7 ppm SiC and 9.0 − 3.6 + 5.4 ppm carbonaceous grains. Thus, our results provide further evidence in support of the Ryugu–CI connection. They also reveal intriguing hints of small-scale heterogeneities in the Ryugu s les, such as locally distinct degrees of alteration that allowed the preservation of delicate presolar material.
Major Miocene geological events in southern Tibet and eastern Asia induced by the subduction of the Ninetyeast Ridge
Publisher: Springer Science and Business Media LLC
Date: 16-02-2018
Timing of global crustal metamorphism on Vesta as revealed by high-precision U-Pb dating and trace element chemistry of eucrite zircon
Publisher: Elsevier BV
Date: 2015
Formation of chondrules in magnetic winds blowing through the proto-asteroid belt
Publisher: Elsevier BV
Date: 04-2012
Sensitive high resolution ion microprobe-stable isotope (SHRIMP-SI) analysis of water in silicate glasses and nominally anhydrous reference minerals
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5JA00047E
Abstract: Water concentrations in geological reference materials are evaluated with the new SHRIMP SI ion microprobe.
Ion microprobe identification of 4,100-4,200 Myr-old terrestrial zircons
Publisher: Springer Science and Business Media LLC
Date: 08-1983
DOI: 10.1038/304616A0
Can galactic chemical evolution explain the oxygen isotopic variations in the solar system?
Publisher: American Astronomical Society
Date: 16-10-2012
Crystallographic and crystallochemical controls on oxygen isotope analysis of hematite by SIMS
Publisher: Elsevier BV
Date: 11-2021
SHRIMP ion probe zircon geochronology and Sr and Nd isotope geochemistry for southern longwood range and bluff peninsula intrusive rocks of Southland, New Zealand
Publisher: Informa UK Limited
Date: 09-2006
The Earth, Planets and Space Special Issue: science of solar system materials examined from Hayabusa and future missions Science of solar system materials examined from Hayabusa and future missions
Publisher: Springer Science and Business Media LLC
Date: 26-07-2015
The chemical conditions of the late Archean Hamersley basin inferred from whole rock and pyrite geochemistry with δ33S and δ34S isotope analyses
Publisher: Elsevier BV
Date: 2015
Arc-continent collision and orogenesis in western Tasmanides: Insights from reactivated basement structures and formation of an ocean-continent transform boundary off western Tasmania
Publisher: Elsevier BV
Date: 04-2011
The solar system's earliest chemistry: Systematics of refractory inclusions
Publisher: Informa UK Limited
Date: 10-0010
Magnetocentrifugal jets and chondrule formation in protostellar disks
Publisher: Cambridge University Press (CUP)
Date: 06-2013
DOI: 10.1017/S1743921313008442
Abstract: Chondrite meteorites are the building blocks of the solar nebula, out of which our Solar System formed. They are a mixture of silicate and oxide objects (chondrules and refractory inclusions) that experienced very high temperatures, set in a matrix that remained cold. Their prevalence suggests that they formed through a very general process, closely related to stellar and planet formation. However the nature and properties of the responsible mechanism have remained unclear. The evidence for a hot solar nebula provided by this material seems at odds with astrophysical observations of forming stars. These indicate that the typical temperatures of protostellar disks are too low to melt and vapourise silicate minerals at the radial distances s led by chondrule-bearing meteorites. Here, we show that processing of precursors in a protostellar outflow at radial distances of about 1 – 3 AU can heat them to their melting points and explain their basic properties, while retaining association with the colder matrix.
Rapid cooling of planetesimal core-mantle reaction zones from Mn-Cr isotopes in pallasites
Publisher: European Association of Geochemistry
Date: 2016
Adakitic rocks associated with the Shilu copper–molybdenum deposit in the Yangchun Basin, South China, and their tectonic implications
Publisher: Springer Science and Business Media LLC
Date: 17-02-2017
Three-Dimensional Structure of Hayabusa Samples: Origin and Evolution of Itokawa Regolith
Publisher: American Association for the Advancement of Science (AAAS)
Date: 26-08-2011
Abstract: Laboratory analysis of s les returned from an asteroid establishes a direct link between asteroids and meteorites and provides clues to the complex history of the asteroid and its surface.
A tale of two eras: Pliocene-Pleistocene unroofing of Cenozoic and late Archean zircons from active metamorphic core complexes, Solomon Sea, Papua New Guinea
Publisher: Geological Society of America
Date: 1995
Dating the Oldest Rocks and Minerals in the Solar System
Publisher: Mineralogical Society of America
Date: 02-2013
Gondwana margin evolution from zircon REE, O and Hf signatures of Western Province gneisses, Zealandia
Publisher: Geological Society of London
Date: 02-06-2015
DOI: 10.1144/SP389.10
Re-initiation of plutonism at the Gondwana margin after a magmatic hiatus: The bimodal Permian-Triassic Longwood Suite, New Zealand
Publisher: Elsevier BV
Date: 05-2022
Allanite micro-geochronology: A LA-ICP-MS and SHRIMP U-Th-Pb study
Publisher: Elsevier BV
Date: 11-2007
Protocols for in situ measurement of oxygen isotopes in goethite by ion microprobe
Publisher: Elsevier BV
Date: 02-2020
Tectonics of the Qinling (Central China): tectonostratigraphy, geochronology, and deformation history
Publisher: Elsevier BV
Date: 05-2003
Where does India end and Eurasia begin?
Publisher: American Geophysical Union (AGU)
Date: 10-2011
DOI: 10.1029/2011GC003726
530 Ma zircon age for ophiolite from the New England Orogen: oldest rocks known from eastern Australia
Publisher: Geological Society of America
Date: 1992
Al2O3 dust in OH/IR stars
Publisher: Oxford University Press (OUP)
Date: 21-09-2005
Age constraints on metamorphism and the development of a metamorphic core complex in Fiordland, southern New Zealand
Publisher: Geological Society of America
Date: 2023
Foulwind Suite magmatism in the Buller Terrane, New Zealand: geochemistry of the Carboniferous Foulwind and Windy Point Granites
Publisher: Informa UK Limited
Date: 12-08-0006
Cretaceous sedimentation and metamorphism of the western Alpine Schist protoliths associated with the Pounamu Ultramafic Belt, Westland, New Zealand
Publisher: Informa UK Limited
Date: 12-2013
Development of SHRIMP
Publisher: Informa UK Limited
Date: 08-2008
Field and Geochemical Constraints on Mafic-Felsic Interactions, and Processes in High-level Arc Magma Chambers: an Example from the Halfmoon Pluton, New Zealand
Publisher: Oxford University Press (OUP)
Date: 02-06-2010
IRAS 22036+5306: An Al2 O3 oxide-dominated post-AGB star
Publisher: Oxford University Press (OUP)
Date: 06-2008
U-Th/He systematics of fluid-rich ‘fibrous’ diamonds – Evidence for pre- and syn-kimberlite eruption ages
Publisher: Elsevier BV
Date: 06-2019
Author Correction: Contribution of Ryugu-like material to Earth’s volatile inventory by Cu and Zn isotopic analysis
Publisher: Springer Science and Business Media LLC
Date: 14-03-2023
Abundant presolar grains and primordial organics preserved in carbon-rich exogenous clasts in asteroid Ryugu
Publisher: American Association for the Advancement of Science (AAAS)
Date: 14-07-2023
Abstract: Preliminary analyses of asteroid Ryugu s les show kinship to aqueously altered CI (Ivuna-type) chondrites, suggesting similar origins. We report identification of C-rich, particularly primitive clasts in Ryugu s les that contain preserved presolar silicate grains and exceptional abundances of presolar SiC and isotopically anomalous organic matter. The high presolar silicate abundance (104 ppm) indicates that the clast escaped extensive alteration. The 5 to 10 times higher abundances of presolar SiC (~235 ppm), N-rich organic matter, organics with N isotopic anomalies (1.2%), and organics with C isotopic anomalies (0.2%) in the primitive clasts compared to bulk Ryugu suggest that the clasts formed in a unique part of the protoplanetary disk enriched in presolar materials. These clasts likely represent previously uns led outer solar system material that accreted onto Ryugu after aqueous alteration ceased, consistent with Ryugu’s rubble pile origin.
EUROPIUM s-PROCESS SIGNATURE AT CLOSE-TO-SOLAR METALLICITY IN STARDUST SiC GRAINS FROM ASYMPTOTIC GIANT BRANCH STARS
Publisher: American Astronomical Society
Date: 18-04-2013
Ryugu's nucleosynthetic heritage from the outskirts of the Solar System.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 18-11-2022
Abstract: Little is known about the origin of the spectral ersity of asteroids and what it says about conditions in the protoplanetary disk. Here, we show that s les returned from Cb-type asteroid Ryugu have Fe isotopic anomalies indistinguishable from Ivuna-type (CI) chondrites, which are distinct from all other carbonaceous chondrites. Iron isotopes, therefore, demonstrate that Ryugu and CI chondrites formed in a reservoir that was different from the source regions of other carbonaceous asteroids. Growth and migration of the giant planets destabilized nearby planetesimals and ejected some inward to be implanted into the Main Belt. In this framework, most carbonaceous chondrites may have originated from regions around the birthplaces of Jupiter and Saturn, while the distinct isotopic composition of CI chondrites and Ryugu may reflect their formation further away in the disk, owing their presence in the inner Solar System to excitation by Uranus and Neptune.
The limitations of hibonite as a single-mineral oxybarometer for early solar system processes
Publisher: Elsevier BV
Date: 09-2017
Oxygen isotopes of anhydrous primary minerals show kinship between asteroid Ryugu and comet 81P/Wild2
Publisher: American Association for the Advancement of Science (AAAS)
Date: 16-12-2022
Abstract: The extraterrestrial materials returned from asteroid (162173) Ryugu consist predominantly of low-temperature aqueously formed secondary minerals and are chemically and mineralogically similar to CI (Ivuna-type) carbonaceous chondrites. Here, we show that high-temperature anhydrous primary minerals in Ryugu and CI chondrites exhibit a bimodal distribution of oxygen isotopic compositions: 16 O-rich (associated with refractory inclusions) and 16 O-poor (associated with chondrules). Both the 16 O-rich and 16 O-poor minerals probably formed in the inner solar protoplanetary disk and were subsequently transported outward. The abundance ratios of the 16 O-rich to 16 O-poor minerals in Ryugu and CI chondrites are higher than in other carbonaceous chondrite groups but are similar to that of comet 81P/Wild2, suggesting that Ryugu and CI chondrites accreted in the outer Solar System closer to the accretion region of comets.
Temporal evolution and compositional signatures of two supervolcanic systems recorded in zircons from Mangakino volcanic centre, New Zealand
Publisher: Springer Science and Business Media LLC
Date: 06-2014
Regional implications of U/Pb SHRIMP age constraints on the tectonic evolution of New Caledonia
Publisher: Elsevier BV
Date: 12-1998
The regional significance of Cretaceous magmatism and metamorphism in Fiordland, New Zealand, from U-Pb zircon geochronology
Publisher: Wiley
Date: 09-2004
Ion microprobe dating of paleozoic granitoids: Devonian magmatism in New Zealand and correlations with Australia and Antarctica
Publisher: Elsevier BV
Date: 1996
Mn-Cr dating of Fe- and Ca-rich olivine from 'quenched' and 'plutonic' angrite meteorites using Secondary Ion Mass Spectrometry
Publisher: Elsevier BV
Date: 05-2015
Evaluation of Duluth Complex anorthositic series (AS3) zircon as a U-Pb geochronological standard: New high-precision isotope dilution thermal ionization mass spectrometry results
Publisher: Elsevier BV
Date: 10-2003
Formation, cooling history and age of impact events on the IIE iron parent body: Evidence from the Miles meteorite
Publisher: Elsevier BV
Date: 12-2022
U-Pb chronology of the Solar System's oldest solids with variable U-238/U-235
Publisher: Elsevier BV
Date: 12-2010
Trends in Ocean S‐Isotopes May Be Influenced by Major LIP Events
Publisher: Wiley
Date: 08-01-2021
The role of protostellar jets in star formation and the evolution of the early solar system: Astrophysical and meteoritical perspectives
Publisher: Wiley
Date: 12-2012
DOI: 10.1111/MAPS.12029
High‐Precision, High‐Accuracy Oxygen Isotope Measurements of Zircon Reference Materials with the SHRIMP‐SI
Publisher: Wiley
Date: 24-11-2019
DOI: 10.1111/GGR.12298
Carbonate record of temporal change in oxygen fugacity and gaseous species in asteroid Ryugu
Publisher: Springer Science and Business Media LLC
Date: 10-07-2023
Fluorine partitioning between eclogitic garnet, clinopyroxene, and melt at upper mantle conditions
Publisher: Elsevier BV
Date: 10-2016
Synsedimentary to early diagenetic gold in Black shale-hosted pyrite nodules at the Golden Mile deposit, Kalgoorlie, Western Australia
Publisher: Society of Economic Geologists
Date: 22-05-2015
The unexpected surface of asteroid (101955) Bennu
Publisher: Springer Science and Business Media LLC
Date: 19-03-2019
Molar mass measurement of a 28Si-enriched silicon crystal with high precision secondary ion mass spectrometry (SIMS)
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2JA00229A
Abstract: Several highly-enriched 28 Si crystals were produced to enable a better determination of the Avogadro constant through removing the uncertainty associated with the abundance determination of the minor isotopes 29 Si and 30 Si.
New insight into the dynamic development of the Southern Alps, New Zealand, from detailed thermochronological investigation of the Mataketake Range pergmatites
Publisher: Geological Society of London
Date: 1999
Bioinspired Scaffolding by Supramolecular Amines Allows the Formation of One‐ and Two‐Dimensional Silica Superstructures
Publisher: Wiley
Date: 19-10-2020
Ba isotopic compositions in stardust SiC grains from the Murchison meteorite: Insights into the stellar origins of large SiC grains
Publisher: Elsevier BV
Date: 11-2013
SIMS Measurement of Stable Isotopes
Publisher: Elsevier
Date: 2004
Light Stable Isotopes (H, B, C, O and S) in Ore Studies—Methods, Theory, Applications and Uncertainties
Publisher: Springer International Publishing
Date: 2023
DOI: 10.1007/978-3-031-27897-6_8
Abstract: Variations in the abundances of light stable isotopes, particularly those of hydrogen, boron, carbon, oxygen and sulfur, were essential in developing mineralization models. The data provide constraints on sources of hydrothermal fluids, carbon, boron and sulfur, track interaction of these fluids with the rocks at both the deposit and district scales, and establish processes of ore deposition. In providing such constraints, isotopic data have been integral in developing genetic models for porphyry-epithermal, volcanic-hosted massive sulfide, orogenic gold, sediment-hosted base metal and banded-iron formation-hosted iron ore systems, as discussed here and in other chapters in this book. After providing conventions, definitions and standards used to present stable isotope data, this chapter summarizes analytical methods, both bulk and in situ, discusses processes that fractionate stable isotopes, documents the isotopic characteristics of major fluid and rock reservoirs, and then shows how stable isotope data have been used to better understand ore-forming processes and to provide vectors to ore. Analytical procedures, initially developed in the 1940s for carbon–oxygen analysis of bulk s les of carbonate minerals, have developed so that, for most stable isotopic systems, spots as small as a few tens of μm are routinely analyzed. This precision provides the paragenetic and spatial resolution necessary to answer previously unresolvable genetic questions (and create new questions). Stable isotope fractionation reflects geological and geochemical processes important in ore formation, including: (1) phase changes such as boiling, (2) water–rock interaction, (3) cooling, (4) fluid mixing, (5) devolatilization, and (6) redox reactions, including SO 2 disproportionation caused by the cooling of magmatic-hydrothermal fluids and photolytic dissociation in the atmosphere. These processes commonly produce gradients in isotopic data, both in time and in space. These gradients, commonly mappable in space, provide not only evidence of process but also exploration vectors. Stable isotope data can be used to estimate the conditions of alteration or mineralization when data for coexisting minerals are available. These estimates use experimentally- or theoretically-determined fractionation equations to estimate temperatures of mineral formation. If the temperature is known from isotopic or other data (e.g., fluid inclusion data or chemical geothermometers), the isotopic composition of the hydrothermal fluid components can be estimated. If fluid inclusion homogenization and compositional data exist, the pressure and depth of mineralization can be estimated. One of the most common uses of stable isotope data has been to determine, or more correctly delimit, fluid and sulfur sources. Estimates of the isotopic compositions of hydrothermal fluids, in most cases, do not define unequivocal sources, but, rather, eliminate sources. As an ex le, the field of magmatic fluids largely overlap that of metamorphic fluids in δ 18 O-δD space, but are significantly different to the fields of meteoric waters and seawater. As such, a meteoric or seawater origin for a fluid source may be resolvable, but a magmatic source cannot be resolved from a metamorphic source. Similarly, although δ 34 S ~ 0‰ is consistent with a magmatic-hydrothermal sulfur source, the signature can also be produced by leaching of an igneous source. Recent analytical and conceptual advances have enabled gathering of new types of isotopic data and application of these data to resolve new problems in mineral deposit genesis and geosciences in general. Recent developments such as rapid isotopic analysis of geological materials or clumped isotopes will continue to increase the utility of stable isotope data in mineral deposit genesis and metallogeny, and, importantly, for mineral exploration.
Ion Microscopes and Microprobes
Publisher: Elsevier
Date: 2013
Comparative geochemical study of scheelite from the Shizhuyuan and Xianglushan tungsten skarn deposits, South China: Implications for scheelite mineralization
Publisher: Elsevier BV
Date: 06-2019
Invited Review Article: Recent developments in isotope-ratio mass spectrometry for geochemistry and cosmochemistry
Publisher: AIP Publishing
Date: 2013
DOI: 10.1063/1.4765055
Abstract: Mass spectrometry is fundamental to measurements of isotope ratios for applications in isotope geochemistry, geochronology, and cosmochemistry. Magnetic-sector mass spectrometers are most common because these provide the best precision in isotope ratio measurements. Where the highest precision is desired, chemical separation followed by mass spectrometric analysis is carried out with gas (noble gas and stable isotope mass spectrometry), liquid (inductively coupled plasma mass spectrometry), or solid (thermal ionization mass spectrometry) s les. Developments in in situ analysis, including ion microprobes and laser ablation inductively coupled plasma mass spectrometry, have opened up issues concerning homogeneity according to domain size, and allow ever smaller amounts of material to be analyzed. While mass spectrometry is built solidly on developments in the 20th century, there are new technologies that will push the limits in terms of precision, accuracy, and s le efficiency. Developments of new instruments based on time-of-flight mass spectrometers could open up the ultimate levels of sensitivity per s le atom.
Zircon geochemistry of two contrasting types of eclogite: Implications for the tectonic evolution of the North Qaidam UHPM belt, northern Tibet
Publisher: Elsevier BV
Date: 07-2016
Textural and geochemical investigation of pyrite in Jacobina Basin, São Francisco Craton, Brazil: Implications for paleoenvironmental conditions and formation of pre-GOE metaconglomerate-hosted Au-(U) deposits
Publisher: Elsevier BV
Date: 03-2020
Provenance analysis using conglomerate clast lithologies: a case study from the Pahau terrane of New Zealand
Publisher: Elsevier BV
Date: 05-2004
Late Pleistocene granodiorite beneath Crater Lake caldera, Oregon, dated by ion microprobe
Publisher: Geological Society of America
Date: 05-2000
Mass-spectrometric mining of Hadean zircons by automated SHRIMP multi-collector and single-collector U/Pb zircon age dating: The first 100,000 grains
Publisher: Elsevier BV
Date: 09-2009
Triple oxygen isotope variations in magnetite from iron-oxide deposits, central Iran, record magmatic fluid interaction with evaporite and carbonate host rocks
Publisher: Geological Society of America
Date: 17-12-2019
DOI: 10.1130/G46981.1
Abstract: Oxygen isotope ratios in magnetite can be used to study the origin of iron-oxide ore deposits. In previous studies, only 18O/16O ratios of magnetite were determined. Here, we report triple O isotope data (17O/16O and 18O/16O ratios) of magnetite from the iron-oxide–apatite (IOA) deposits of the Yazd and Sirjan areas in central Iran. In contrast to previous interpretations of magnetite from similar deposits, the triple O isotope data show that only a few of the magnetite s les potentially record isotopic equilibrium with magma or with pristine magmatic water (H2O). Instead, the data can be explained if magnetite had exchanged O isotopes with fluids that had a mass-independently fractionated O isotope composition (i.e., MIF-O), and with fluids that had exchanged O isotopes with marine sedimentary carbonate rocks. The MIF-O signature of the fluids was likely obtained by isotope exchange with evaporite rocks of early Cambrian age that are associated with the IOA deposits in central Iran. In order to explain the triple O isotope composition of the magnetite s les in conjunction with available iron isotope data for magnetite from the deposits, we propose that magnetite formed from magmatic fluids that had interacted with evaporite and carbonate rocks at high temperatures and at variable water/rock ratios e.g., magmatic fluids that had been released into the country rocks of a magma reservoir. Additionally, the magnetite could have formed from magmatic fluids that had exchanged O isotopes with SO2 and CO2 that, in turn, had been derived by the magmatic assimilation and/or metamorphic breakdown of evaporite and carbonate rocks.
Generation of Late Mesozoic Qianlishan A2 -type granite in Nanling Range, South China: Implications for Shizhuyuan W–Sn mineralization and tectonic evolution
Publisher: Elsevier BV
Date: 12-2016
Sources of auriferous fluids associated with a Neoarchean BIF-hosted orogenic gold deposit revealed by the multiple sulfur isotopic compositions of zoned pyrites
Publisher: Springer Science and Business Media LLC
Date: 31-03-2021
A Caledonian age for the Kiloran Bay appinite intrusion on Colonsay, inner Hebrides
Publisher: Geological Society of London
Date: 06-1997
DOI: 10.1144/SJG33010075
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