ORCID Profile
0000-0003-3096-5658
Current Organisation
University of Tasmania
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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 | Ore Deposit Petrology | Geochemistry | Geochronology And Isotope Geochemistry | Igneous And Metamorphic Petrology | Exploration Geochemistry | Ore Deposit Petrology | Exploration Geochemistry | Geochemistry Not Elsewhere Classified | Chemical Characterisation of Materials | Agroforestry | Mineralogy And Crystallography | Igneous and Metamorphic Petrology | Groundwater Hydrology | Geochronology | Inorganic Geochemistry Not Elsewhere Classified | Mineral Processing/Beneficiation | Marine And Estuarine Ecology (Incl. Marine Ichthyology) | Microbial Ecology | Geomorphology | Quaternary Environments | Analytical Spectrometry | Electromagnetism | Geodynamics | Isotope Geochemistry | Sedimentology | Volcanology | Tectonics
ANZSRC Socio-Economic Objective (SEO)
Mineral Exploration not elsewhere classified | Earth sciences | Expanding Knowledge in the Earth Sciences | Precious (Noble) Metal Ore Exploration | Copper Ore Exploration | Management of Solid Waste from Mineral Resource Activities | Hardwood plantations | Energy Exploration not elsewhere classified | Concentrating processes of other base metal ores | Climate change | Environmentally Sustainable Mineral Resource Activities not elsewhere classified | Effects of Climate Change and Variability on Australia (excl. Social Impacts) | Rehabilitation of degraded mining lands | Land and water management | First stage treatment of ores and minerals |
Related Links
Publications
Geochronology and significance of volcanic rocks in the Ning-Wu Basin of China
Publisher: Springer Science and Business Media LLC
Date: 11-01-2011
Ore Genesis and Deposit Model of Carbonatite‐host REE Deposits: the Mianning‐Dechang REE Belt, Western Sichuan Province, China
Publisher: Wiley
Date: 12-2014
Structural Evolution of the Rio Blanco-Los Bronces District, Andes of Central Chile: Controls on Stratigraphy, Magmatism, and Mineralization
Publisher: Society of Economic Geologists
Date: 09-11-2015
Apatite texture, composition, and O-Sr-Nd isotope signatures record magmatic and hydrothermal fluid characteristics at the Black Mountain porphyry deposit, Philippines
Publisher: Society of Economic Geologists, Inc.
Date: 08-2021
DOI: 10.5382/ECONGEO.4827
Abstract: The trace elemental and isotopic signatures in apatite can be modified during hydrothermal alteration. This study investigates the suitability of apatite as an indicator of the source, chemistry, and evolution of magma and hydrothermal fluids. In situ textural, elemental, and O-Sr-Nd isotope analyses were performed on apatite in thin sections, from fresh and propylitically altered pre- and synmineralized dioritic porphyries from the Black Mountain porphyry Cu deposit in the Philippines. All studied apatite crystals have similar subhedral to euhedral shapes and are homogeneous in the grayscale in backscattered electron images. In cathodoluminescence images, the apatite in fresh and altered rocks displays yellow to yellow-green and green to brown luminescence, respectively. Apatite in fresh rocks has a higher Cl and Mn content, and lower Fe, Mg, Sr, Pb, and calculated XOH-apatite, compared to apatite in altered rocks. The content of F, rare earth elements (REEs), Y, U, Th, and Zr, and the Sr-Nd isotope signatures of apatite from fresh and altered rocks are similar in all apatite grains (87Sr/86Sr = 0.7034–0.7042 vs. 0.7032–0.7043, εNd(t) = 5.3–8.0 vs. 5.1–8.4). The X-ray maps and elemental and oxygen isotope signatures across in idual apatite crystals are typically homogeneous in apatite from both fresh and altered rocks. The distinct luminescence colors, coupled with distinct mobile element compositions (Cl, OH, Mn, Mg, Fe, Sr, Pb), indicate modification of primary magmatic apatite during interaction with hydrothermal fluids. The similarities in Sr isotope ratios (87Sr/86Sr = 0.7032–0.7043) but slight differences in O isotope signatures (δ18O = 6.0 ± 0.3‰ vs. 6.6 ± 0.3‰) in apatite from fresh and altered rocks are consistent with the magma and hydrothermal fluids having the same source and suggest significant phase separation in the hydrothermal fluids given that 18O preferentially fractionates into the residual liquid relative to 16O during phase separation. The similarity of immobile element (REE, Y, U, Th, and Zr) contents in both populations of apatite, consistency of textures and Nd isotope compositions, and absence of obvious dissolution-reprecipitation features all suggest that altered apatite retains some magmatic characteristics. The apatite in fresh rocks has oxygen isotope compositions similar to that of zircons from the same s le (δ18O = 5.9 ± 0.3‰), indicating little to no oxygen isotope fractionation between zircon and apatite and that apatite can be a good proxy for the oxygen isotope composition of the magma. Based on the Cl contents of the magmatic and replacement apatite, and assuming their equilibrium with high-temperature magma fluid and replacement hydrothermal fluid, respectively, the calculated Cl content of the early magmatic fluid and the later replacement fluid can be estimated to be 6.4 to 15.1 wt % and ~0.25 ± 0.03 wt %, respectively. This indicates a depletion of Cl from the early high-temperature fluid to the replacement fluid, consistent with phase separation. This study demonstrates that cathodoluminescence, elemental compositions (such as Cl, Mn, Mg, Fe, Sr, Pb) and Sr-O isotope signatures in apatite can be modified during hydrothermal alteration, whereas other components (REE, Y, U, Th, and Zr) and the Nd isotope composition are preserved. These features can be used to constrain the origin, chemistry, and evolution of the primary magma and ore-forming hydrothermal fluids.
A Microscale Analysis of Hydrothermal Epidote: Implications for the Use of Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry Mineral Chemistry in Complex Alteration Environments
Publisher: Society of Economic Geologists
Date: 06-2020
DOI: 10.5382/ECONGEO.4705
Abstract: High-resolution, quantitative imaging of epidote from the Ann Mason fault block, Yerington district, Nevada, using scanning electron microscopy (SEM), X-ray fluorescence (XRF), and laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) has revealed at least two types of epidote (type 1 and type 2), each with different major and trace element chemistry. Type 1 epidote is coarser grained, typically greater than 50 μm in diameter, and forms euhedral crystals that display twins and sector zones enriched in Fe, Sr, and Mn. Type 2 epidote is finer grained, typically less than 30 μm in diameter, irregularly zoned with respect to Fe and Al, and forms polycrystalline aggregates that include void space. Two sources of intragranular compositional variability are defined in this study—one related to different generations of epidote only visible on the microscale, and the other related to crystallographic features such as sector zones and twins. Intragranular compositional variations within Yerington epidotes highlight the potential importance of detailed s le characterization in complex alteration environments prior to undertaking mineral chemistry studies in the context of resource exploration. Based on statistical analysis of LA-ICP-MS spot data from one s le, the optimal number of spot analyses to adequately represent the range in element concentrations within zoned or twinned crystals is determined to be at least 40.
Chlorite and Epidote Mineral Chemistry in Porphyry Ore Systems: A Case Study of the Northparkes District, New South Wales, Australia
Publisher: Society of Economic Geologists
Date: 06-2020
DOI: 10.5382/ECONGEO.4700
Abstract: Propylitic alteration, characterized by the occurrence of chlorite and epidote, is typically the most extensive and peripheral alteration facies developed around porphyry ore deposits. However, exploration within this alteration domain is particularly challenging, commonly owing to weak or nonexistent whole-rock geochemical gradients and the fact that similar assemblages can be developed in other geologic settings, particularly during low-grade metamorphism. We document and interpret systematic spatial trends in the chemistry of chlorite and epidote from propylitic alteration around the E48 and E26 porphyry Cu-Au deposits of the Northparkes district, New South Wales, Australia. These trends vary as a function of both distance from hydrothermal centers and alteration paragenesis. The spatial trends identified in porphyry-related chlorite and epidote at Northparkes include (1) a deposit-proximal increase in Ti, As, Sb, and V in epidote and Ti in chlorite, (2) a deposit-distal increase in Co and Li in chlorite and Ba in epidote, and (3) a pronounced halo around deposits in which Mn and Zn in chlorite, as well as Mn, Zn, Pb, and Mg in epidote, are elevated. Chlorite Al/Si ratios and epidote Al/Fe ratios may show behavior similar to that of Mn-Zn or may simply decrease outward, and V and Ni concentrations in chlorite are lowest in the peak Mn-Zn zone. In comparison to porphyry-related s les, chlorite from the regional metamorphic assemblage in the district contains far higher concentrations of Li, Ca, Ba, Pb, and Cu but much less Ti. Similarly, metamorphic epidote contains higher concentrations of Sr, Pb, As, and Sb but less Bi and Ti. These chlorite and epidote compositional trends are the net result of fluid-mineral partitioning under variable physicochemical conditions within a porphyry magmatic-hydrothermal system. They are most easily explained by the contribution of spent magmatic-derived ore fluid(s) into the propylitic domain. It is envisaged that such fluids experience progressive cooling and reduction in fs2 during outward infiltration into surrounding country rocks, with their pH controlled by the extent of rock-buffering experienced along the fluid pathway.
SEG Release: A New Compilation on Porphyry Deposits: Porphyry Copper, Gold, and Molybdenum Deposits: 1905–2012
Publisher: Society of Economic Geologists, Inc.
Date: 10-2013
DOI: 10.5382/SEGNEWS.2013-95.FEA
Abstract: With the publication of this collection of papers on porphyry deposits, SEG offers a signifıcant addition to its popular Compilation series. Introduced in 2007, the series brings together papers on a single theme, collected from the entire archive of Economic Geology and other SEG publications, in a searchable, digital format—on CD-ROM or, as is the case with the newest release, on a DVD. The porphyry compilation, organized by Editor David Cooke, was available at the Whistler 2013 Conference in September and can now be purchased online through the SEG bookstore (tore). We include below the preface written by Cooke, which also appears on the DVD.
Tectonic setting of porphyry Cu – Au mineralisation in the Ordovician – Early Silurian Macquarie Arc, Eastern Lachlan Orogen, New South Wales
Publisher: Informa UK Limited
Date: 03-2007
GEOLOGY, MINERALIZATION, ALTERATION AND STRUCTURAL EVOLUTION OF EL TENIENTE PORPHYRY Cu-Mo DEPOSIT--A REPLY
Publisher: Society of Economic Geologists
Date: 09-2007
Tourmaline-rich features in the Heemskirk and Pieman Heads granites from western Tasmania, Australia: Characteristics, origins, and implications for tin mineralization
Publisher: Mineralogical Society of America
Date: 04-2017
DOI: 10.2138/AM-2017-5838
Geology, geochemistry and genesis of the Makou magnetite-apatite deposit in the Luzong volcanic basin, Middle-Lower Yangtze River Valley Metallogenic Belt, Eastern China
Publisher: Elsevier BV
Date: 12-2017
Mesozoic iron oxide copper-gold mineralization in the Central Andes and the Gondwana supercontinent breakup
Publisher: Society of Economic Geologists
Date: 2013
In situ elemental and sr isotope characteristics of magmatic to hydrothermal minerals from the black mountain porphyry deposit, Baguio District, Philippines
Publisher: Society of Economic Geologists
Date: 06-2020
DOI: 10.5382/ECONGEO.4701
Abstract: At the Black Mountain porphyry Cu-Au deposit in the Baguio district, Northern Luzon (Philippines), pre- and synmineralized rocks preserve magmatic and hydrothermal minerals (e.g., plagioclase, hibole, titanite, and epidote) spanning the complete paragenesis of the deposit. Strontium isotope values in early crystallized plagioclase phenocrysts from all felsic porphyries can be ided into two types. The type-I plagioclase crystals show relatively homogeneous Sr isotope values (0.7035–0.7038, 1σ & .0001), indicating crystallization from a relatively stable and long-lived felsic magma chamber. The type-II plagioclase grains have a wider range of Sr isotope compositions (0.7032–0.7039, 1σ & .0001), indicating mafic and/or felsic magma recharge. In magmatic titanite, Nb/Ta values are higher than those in the whole rock, while Zr/Hf and Y/Ho values are lower. In hydrothermal titanite and epidote, the ratios are similar to those in the whole rock. These patterns reflect crystallization effects imposed during the magmatic stage but an absence of differentiation during the hydrothermal stage. The consistent gradual decrease in total rare earth element, Y, Zr, and U contents in both hydrothermal titanite and epidote from early to late stages indicates the effect of hydrothermal fluid evolution with decreasing temperature. The variation of 87Sr/86Sr values in magmatic hibole, plagioclase, and hydrothermal epidote in felsic and mafic rocks indicates the addition of mafic magma-derived fluid into the felsic magma-derived fluid. One extra source of fluid (probably derived from wall-rock limestone) was required to generate the highly radiogenic 87Sr/86Sr values of some epidote (0.7038–0.7053). Thus, in situ elemental and Sr isotope variation in minerals from different paragenetic stages can be used to interpret formation process and source for both magmas and hydrothermal fluids.
Geology and Genesis of the Cerro la Mina Porphyry-High Sulfidation Au (Cu-Mo) Prospect, Mexico
Publisher: Society of Economic Geologists
Date: 03-04-2017
Arc-oblique fault systems: their role in the Cenozoic structural evolution and metallogenesis of the Andes of central Chile
Publisher: Elsevier BV
Date: 08-2016
Epithermal Au-Ag-Te Mineralization, Acupan, Baguio District,Philippines: Numerical Simulations of Mineral Deposition
Publisher: Society of Economic Geologists
Date: 2001
Endeavour Copper-Gold Porphyry Deposits, Northparkes, New South Wales: Intrusive History and Fluid Evolution
Publisher: Society of Economic Geologists
Date: 12-2003
Cathodoluminescence features, trace elements, and oxygen isotopes of quartz in unidirectional solidification textures from the Sn-mineralized Heemskirk Granite, western Tasmania
Publisher: Mineralogical Society of America
Date: 2019
DOI: 10.2138/AM-2019-6534
Mechanisms of arsenic attenuation in acid mine drainage from Mount Bischoff, western Tasmania
Publisher: Elsevier BV
Date: 06-2005
DOI: 10.1016/J.SCITOTENV.2004.10.030
Abstract: There is a dearth of research concerning the geochemistry of arsenic in acid mine drainage (AMD) in western Tasmania. To help address this, the controls on the mobility and fate of arsenic in AMD and its associated sediment at the Mount Bischoff mine site in western Tasmania were investigated. AMD issuing from the adit mouth contained dissolved arsenic and iron concentrations of 2.5 and 800 mg L(-1), respectively. The aqueous concentration of both arsenic and iron decreased markedly over a 150-m stretch from the adit mouth due to precipitation of hydrous ferric oxides (HFO) and jarosite, both of which are effective scavengers of arsenic. Microwave-assisted digestion of the sediment collected at the adit mouth revealed that the arsenic concentration exceeded 1%. Sequential extraction of this sediment showed that the bulk of arsenic was associated with amorphous and crystalline hydrous oxides of Al and/or Fe. Extended X-ray absorption fine structure (EXAFS) analysis indicated that the solid phase arsenic exists as As(V). EXAFS data were consistent with arsenate tetrahedra substituting for sulphate in jarosite and with corner-sharing complexes adsorbed on ferric oxyhydroxide octahedra. Erosional transport of AMD sediment downstream to higher pH waters may increase the mobility (and hence bioavailablity) of arsenic through dissolution of As-rich jarosite.
Epithermal gold mineralization, Acupan, Baguio District, Philippines; geology, mineralization, alteration, and the thermochemical environment of ore deposition
Publisher: Society of Economic Geologists
Date: 04-1996
Use of Non‐Matrix Matched Reference Materials for the Accurate Analysis of Calcium Carbonate by LA‐ICP‐MS
Publisher: Wiley
Date: 29-10-2021
DOI: 10.1111/GGR.12405
Abstract: Advances in laser ablation inductively coupled plasma‐mass spectrometry have improved analytical precision for mineral analysis, expanding geological interpretations from LA‐ICP‐MS results. However, with improvements in analytical precision, systematic errors from calibration can become more obvious and affect data quality. To improve the accuracy of the LA‐ICP‐MS technique, a fully quantified method is presented for the analysis of minerals with a CaCO 3 matrix. An in‐house calcite s le (P‐Cal) was developed with an independently constrained composition and compared with measurement results from LA‐ICP‐MS analysis, generated using multiple spot sizes, laser fluences and calibration methods. For many elements, calibration against NIST SRM 612 as a calibration reference material and USGS GSD‐1G and USGS BCR‐2G as secondary reference materials (calibration B) provided the best accuracy for CaCO 3 analysis. Ablation rates and element yield (ICP‐MS signal intensity in counts per second for a given isotope relative to the mass fraction of the respective element) in calcium carbonate closely resembles NIST SRM 612 however, the down‐hole fractionation curves of USGS BCR‐2G (basaltic glass matrix) are a better fit for carbonate. Variations in accuracy for measurements at different spot sizes are negligible compared with the other effects discussed. Additionally, ablation characteristics for powdered crystals versus large fragments produce a negligible effect on the accuracy of the results for calcium carbonate.
Assessing Thallium Elemental Systematics and Isotope Ratio Variations in Porphyry Ore Systems: A Case Study of the Bingham Canyon District
Publisher: MDPI AG
Date: 26-11-2018
DOI: 10.3390/MIN8120548
Abstract: The Bingham Canyon porphyry deposit is one of the world’s largest Cu-Mo-Au resources. Elevated concentrations of thallium (Tl) compared to average continental crust have been found in some brecciated and igneous s les in this area, which likely result from mobilization of Tl by relatively low temperature hydrothermal fluids. The Tl-enrichment at Bingham Canyon therefore provides an opportunity to investigate if Tl isotope ratios reflect hydrothermal enrichment and whether there are systematic Tl isotope fractionations that could provide an exploration tool. We present a reconnaissance study of nineteen s les spanning a range of lithologies from the Bingham district which were analysed for their Tl content and Tl isotope ratios, reported as parts per ten thousand (ε205Tl) relative to the NIST SRM997 international standard. The range of ε205Tl reported in this study (−16.4 to +7.2) is the largest observed in a hydrothermal ore deposit to date. Unbrecciated s les collected relatively proximal to the Bingham Canyon porphyry system have ε205Tl of −4.2 to +0.9, similar to observations in a previous study of porphyry deposits. This relatively narrow range suggests that high-temperature ( °C) hydrothermal alteration does not result in significant Tl isotope fractionation. However, two s les ~3–4 km away from Bingham Canyon have higher ε205Tl values (+1.3 and +7.2), and s les from more distal (~7 km) disseminated gold deposits at Melco and Barneys Canyon display an even wider range in ε205Tl (−16.4 to +6.0). The observation of large positive and negative excursions in ε205Tl relative to the mantle value (ε205Tl = −2.0 ± 1.0) contrasts with previous investigations of hydrothermal systems. S les displaying the most extreme positive and negative ε205Tl values also contain elevated concentrations of Tl-Sb-As. Furthermore, with the exception of one s le, all of the Tl isotopic anomalies occur in hydrothermal breccia s les. This suggests that ε205Tl excursions are most extreme during the migration of low-temperature hydrothermal fluids potentially related to sediment-hosted gold mineralization. Future investigation to determine the host phase(s) for Tl in breccias displaying both chalcophile element enrichment and ε205Tl excursions can potentially provide new information about hydrothermal fluid composition and could be used to locate sites for future porphyry exploration.
Assessing copper fertility of intrusive rocks using field portable X-ray fluorescence (pXRF) data
Publisher: Geological Society of London
Date: 14-06-2020
Ultra-Deep Oxidation and Exotic Copper Formation at the Late Pliocene Boyongan and Bayugo Porphyry Copper-Gold Deposits, Surigao, Philippines<subtitle>Geology, Mineralogy, Paleoaltimetry, and Th
Publisher: Society of Economic Geologists
Date: 2009
DOI: 10.5382/SP.14.10
Petrogenesis of volcanic and intrusive rocks of the Zhuanqiao stage, Luzong Basin, Yangtze metallogenic belt, east China: implications for ore deposition
Publisher: Informa UK Limited
Date: 03-11-2010
pXRF assessment of new magmatic fertility indicators in the Macquarie Arc
Publisher: Informa UK Limited
Date: 11-11-2019
Porphyry and epithermal deposits and <sup>40</sup>Ar/ <sup>39</sup>Ar geochronology of the Baguio district, Philippines
Publisher: Society of Economic Geologists
Date: 17-11-2011
Geochemistry and age of magmatic rocks in the unexposed Narromine, Cowal and Fairholme Igneous Complexes in the Ordovician Macquarie Arc, New South Wales
Publisher: Informa UK Limited
Date: 03-2007
The Macquarie Arc, Lachlan Orogen, New South Wales: its evolution, tectonic setting and mineral deposits
Publisher: International Union of Geological Sciences
Date: 03-2012
Alkaline industrial wastes – Characteristics, environmental risks, and potential for mine waste management
Publisher: Elsevier BV
Date: 04-2023
The nature of magmatism at Palinpinon geothermal field, Negros Island, Philippines: Implications for geothermal activity and regional tectonics
Publisher: Elsevier BV
Date: 2004
Cracking the sulfate isotopic determination problem in ancient hydrothermal systems: A pilot assessment of the use of the carbonate-associated sulfate (CAS) method
Publisher: Elsevier BV
Date: 08-2006
Hydrothermal Alteration, Mineralization, and Structural Geology of the Zijinshan High-Sulfidation Au-Cu Deposit, Fujian Province, Southeast China
Publisher: Society of Economic Geologists, Inc.
Date: 06-2019
DOI: 10.5382/ECONGEO.4657
Wall-Rock Petrology and Geochemistry in Alteration Halos Associated with Mesothermal Gold Mineralization, Central Victoria, Australia
Publisher: Society of Economic Geologists
Date: 03-2000
Regional Geochemistry of Tertiary Igneous Rocks in Central Chile: Implications for the Geodynamic Environment of Giant Porphyry Copper and Epithermal Gold Mineralization
Publisher: Society of Economic Geologists
Date: 08-2005
Supergene and Hypogene Halloysite in a Porphyry-Epithermal Environment at Cerro la Mina, Chiapas, Mexico
Publisher: Society of Economic Geologists, Inc.
Date: 08-2013
DOI: 10.2113/ECONGEO.108.5.1147
Abstract: Halloysite, a phyllosilicate clay mineral chemically similar to but structurally different from kaolinite, occurs in a variety of mineral deposit types. It is, however, difficult to identify and dehydrates quite readily. When identified in a porphyry or epithermal environment, halloysite is often interpreted to be a low-temperature polymorph of kaolinite and an indication of supergene processes. The occurrence of halloysite in the Cerro la Mina Au (Cu-Mo) prospect, Chiapas, Mexico, was investigated to determine if halloysite in porphyry-epithermal deposits might also be the product of hypogene processes. The prospect consists of Quaternary volcaniclastic breccias intruded by monzodiorites and trachyandesites crosscut by a volcanic-hydrothermal breccia pipe. Gold-copper-molybdenum mineralization at Cerro la Mina is structurally and lithologically controlled by matrix-rich breccia pipes hosting all of the significant alteration and mineralization drilled to date. Average grades within the prospect are 0.4 ppm Au, 0.16% Cu, and 131 ppm Mo. A total of 100 s les were obtained from 22 diamond drill holes over a range of stratigraphic levels. X-ray diffraction (XRD) and SWIR techniques were employed to identify the different clay minerals found within these s les, including halloysite, kaolinite, dickite, and illite. Identification of halloysite and kaolinite were facilitated by the use of formamide intercalation to produce distinctive peaks for the two minerals in X-ray diffractograms. Halloysite and kaolinite were found to occur from the current erosional surface to depths of over 800 m. Halloysite occurs as both the hydrated 10Å and dehydrated 7Å forms within the deposit. The morphology of the halloysite present is that of well-developed tubes and spheroids. Results of the study show that halloysite associated with gypsum and jarosite is of supergene origin, whereas halloysite occurring with quartz, alunite, dickite, kaolinite, and pyrite is of hypogene origin.
40Ar/ 39Ar and Re-Os geochronology of porphyry copper-molybdenum deposits and related copper-silver veins in the Collahuasi district, Northern Chile
Publisher: Society of Economic Geologists
Date: 06-2004
Geochemical characteristics of the Shujiadian Cu deposit related intrusion in Tongling: Petrogenesis and implications for the formation of porphyry Cu systems in the Middle–Lower Yangtze River Valley
Publisher: Elsevier BV
Date: 05-2016
Giant Porphyry Deposits: Characteristics, Distribution, and Tectonic Controls
Publisher: Society of Economic Geologists
Date: 08-2005
From crucible to graben in 2.3 Ma: A high-resolution geochronological study of porphyry life cycles, boyongan-bayugo copper-gold deposits, Philippines
Publisher: Geological Society of America
Date: 05-2012
DOI: 10.1130/G33125.1
Granites in the Sawuer region of the west Junggar, Xinjiang Province, China: Geochronological and geochemical characteristics and their geodynamic significance
Publisher: Elsevier BV
Date: 12-2008
A model for carbonatite hosted REE mineralisation — the Mianning–Dechang REE belt, Western Sichuan Province, China
Publisher: Elsevier BV
Date: 10-2015
Geology and Geochronology of the Golpu Porphyry and Wafi Epithermal Deposit, Morobe Province, Papua New Guinea
Publisher: Society of Economic Geologists
Date: 2018
Space Shuttle stability and control derivatives estimated from the first entry
Publisher: American Institute of Aeronautics and Astronautics (AIAA)
Date: 07-1983
DOI: 10.2514/3.19828
The Structure and Significance of Anhydrite-Bearing Vein Arrays, Lienetz Orebody, Lihir Gold Deposit, Papua New Guinea
Publisher: Society of Economic Geologists, Inc.
Date: 2018
ERRATUM
Publisher: Society of Economic Geologists
Date: 2012
The Anatomy of an Alkalic Porphyry Cu-Au System: Geology and Alteration at Northparkes Mines, New South Wales, Australia
Publisher: Society of Economic Geologists
Date: 05-2019
DOI: 10.5382/ECONGEO.4644
Geology and geochronology of the Two-Thirty prospect, Northparkes district, NSW
Publisher: Informa UK Limited
Date: 17-01-2021
Processes of ore formation in the stratiform sediment-hosted ZnPbdeposits of Northern Australia: testing the Century model
Publisher: Elsevier BV
Date: 05-2003
THE RIDGEWAY GOLD-COPPER DEPOSIT: A HIGH-GRADE ALKALIC PORPHYRY DEPOSIT IN THE LACHLANFOLD BELT, NEW SOUTH WALES, AUSTRALIA--A REPLY
Publisher: Society of Economic Geologists
Date: 2005
DOI: 10.2113/100.1.0177
Platinum-group element geochemistry of the Forest Reef Volcanics, southeastern Australia: Implications for porphyry Au-Cu mineralisation
Publisher: Elsevier BV
Date: 2018
Trace elements in sulfide minerals from eastern Australian volcanic-hosted massive sulfide deposits; Part I, Proton microprobe analyses of pyrite, chalcopyrite, and sphalerite, and Part II, Selenium l
Publisher: Society of Economic Geologists
Date: 08-1995
Igneous Geochemistry of Mineralized Rocks of the Baguio District, Philippines: Implications for Tectonic Evolution and the Genesis of Porphyry-Style Mineralization
Publisher: Society of Economic Geologists
Date: 17-11-2011
Sulfur isotopic zonation in the Cadia district, southeastern Australia: exploration significance and implications for the genesis of alkalic porphyry gold–copper deposits
Publisher: Springer Science and Business Media LLC
Date: 11-07-2006
Synextensional Emplacement of Porphyry Cu-Mo and Epithermal Mineralization: The Zijinshan District, Southeastern China
Publisher: Society of Economic Geologists
Date: 06-2017
Mineralization, U-Pb Geochronology, and Stable Isotope Geochemistry of the Lower Main Zone of the Lorraine Deposit, North-Central British Columbia: A Replacement-Style Alkalic Cu-Au Porphyry
Publisher: Society of Economic Geologists
Date: 17-03-2014
Geology of the Didipio Region and Genesis of the Dinkidi Alkalic Porphyry Cu-Au Deposit and Related Pegmatites, Northern Luzon, Philippines
Publisher: Society of Economic Geologists
Date: 17-11-2011
Geological evolution and metallogenesis of the Ordovician Macquarie Arc, Lachlan Orogen, New South Wales
Publisher: Informa UK Limited
Date: 03-2007
Evidence for magmatic-hydrothermal fluids and ore-forming processes in epithermal and porphyry deposits of the Baguio district, Philippines
Publisher: Society of Economic Geologists
Date: 17-11-2011
Alkalic porphyry Au – Cu and associated mineral deposits of the Ordovician to Early Silurian Macquarie Arc, New South Wales
Publisher: Informa UK Limited
Date: 03-2007
Tectonics and Geology of Porphyry Cu-Au Deposits along the Eastern Sunda Magmatic Arc, Indonesia
Publisher: Society of Economic Geologists
Date: 2018
Recent advances in the application of mineral chemistry to exploration for porphyry copper–gold–molybdenum deposits: detecting the geochemical fingerprints and footprints of hypogene mineralization an
Publisher: Geological Society of London
Date: 12-02-2020
Shoshonitic magmatism and the formation of the Northparkes porphyry Cu – Au deposits, New South Wales
Publisher: Informa UK Limited
Date: 03-2007
Lithological and Hydrothermal Alteration Mapping of Epithermal, Porphyry and Tourmaline Breccia Districts in the Argentine Andes Using ASTER Imagery
Publisher: MDPI AG
Date: 30-01-2018
DOI: 10.3390/RS10020203
Timing of volatile and magma ascent in the formation of the Bajo de la Alumbrera porphyry Cu-Au deposit
Publisher: Springer Berlin Heidelberg
Date: 2005
Sulfur isotopic zonation in the Cadia porphyry Au–Cu deposits, NSW
Publisher: Elsevier BV
Date: 08-2006
Tectonic triggers for giant porphyry and epithermal deposits of the circum-Pacific region
Publisher: Elsevier BV
Date: 08-2006
Geochemical Modeling of the Zoned Footwall Alteration Pipe, Hellyer Volcanic-Hosted Massive Sulfide Deposit, Western Tasmania, Australia
Publisher: Society of Economic Geologists
Date: 08-2001
DOI: 10.2113/96.5.1037
Evolution of pyrite trace element compositions from porphyry-style and epithermal conditions at the Lihir gold deposit: Implications for ore genesis and mineral processing
Publisher: Society of Economic Geologists, Inc.
Date: 2018
Porphyry fertility in the Northparkes district: indicators from whole-rock geochemistry
Publisher: Informa UK Limited
Date: 06-02-2020
Evaluation of the role of Cambrian granites in the genesis of world class VHMS deposits in Tasmania
Publisher: Elsevier BV
Date: 05-1996
The impact of weather on time allocation to physical activity and sleep of child-parent dyads
Publisher: Elsevier BV
Date: 07-2023
Petrogenetic–metallogenetic setting and temporal–spatial framework of the Yueshan district, Anhui Province, east-central China
Publisher: Informa UK Limited
Date: 29-07-2010
Geology, Mineralization, Alteration, and Structural Evolution of the El Teniente Porphyry Cu-Mo Deposit
Publisher: Society of Economic Geologists
Date: 08-2005
Geochronology of the Tumpangpitu Porphyry Au-Cu-Mo and High-Sulfidation Epithermal Au-Ag-Cu Deposit: Evidence for Pre- and Postmineralization Diatremes in the Tujuh Bukit District, Southeast Java, Ind
Publisher: Society of Economic Geologists
Date: 2018
Physicochemical processes in the magma chamber under the Black Mountain porphyry Cu-Au deposit, Philippines: Insights from mineral chemistry and implications for mineralization
Publisher: Society of Economic Geologists
Date: 2018
Geology of the Boyongan and Bayugo Porphyry Cu-Au Deposits: An Emerging Porphyry District in Northeast Mindanao, Philippines
Publisher: Society of Economic Geologists, Inc.
Date: 2018
A new paradigm for the origin of propylitic alteration in porphyry ore systems
Publisher: Informa UK Limited
Date: 03-04-2019
Long-Term Impact of Historical Mining on Water Quality: A Case Study on Mount Lyell, Western Tasmania, Australia
Publisher: Elsevier BV
Date: 2022
DOI: 10.2139/SSRN.4040013
The Importance of Oxidized Brines for the Formation of Australian Proterozoic Stratiform Sediment-Hosted Pb-Zn (Sedex) Deposits
Publisher: Society of Economic Geologists
Date: 2000
Correction
Publisher: Informa UK Limited
Date: 27-09-2020
Langfristige Auswirkungen des Altbergbaus auf die Wasserbeschaffenheit am Mount Lyell, Westtasmanien, Australien
Publisher: Springer Science and Business Media LLC
Date: 19-07-2023
DOI: 10.1007/S10230-023-00943-5
Abstract: During the twentieth century, inadequate management of mine waste at the Mount Lyell Copper Mine affected the ecology of the Queen–King Rivers and Macquarie Harbour, western Tasmania, Australia. Over the past two decades, the water quality of the river system has been measured semi-annually to investigate the long-term hydrochemical and environmental impacts caused by these historical mine practices and the waste associated with the Mount Lyell mine to the Queen–King Rivers. At s le sites below the confluence of Haulage Creek, the water pH was below pH 3.5, remaining below pH 5 across all sites to Macquarie Harbour. Local baseline rivers ranged from pH 4.0 to 8.4. Elemental concentrations of dissolved metals in water s les downstream of Haulage Creek were above the Australian and New Zealand Environment and Conservation Council (ANZECC) water quality guidelines. Copper, Fe, and Zn were not attenuated along the length of the river, with concentrations remaining elevated to the King River Delta. Mineralogical analyses demonstrated secondary minerals in sediments at Haulage Creek and pyrite concentrated at the King River Delta. Static tests on mining-affected sediments indicated risk of AMD and metal(loid) leaching in the river system. Since 2016, after flooding of the Prince Lyell mine, dissolved metal levels in the Queen–King Rivers have decreased however, concentrations remain above guidelines. Almost three decades after legacy mine waste disposal ended, it still poses a long-term risk to the downstream environment, implying that without effective management of these historical mine wastes, the Queen–King Rivers will continue to be severely impacted. Graphical Abstract
Geochemistry of Au-bearing pyrite from the Sepon Mineral District, Laos DPR, Southeast Asia: Implications for ore genesis
Publisher: Elsevier BV
Date: 09-2018
New Advances in Detecting the Distal Geochemical Footprints of Porphyry Systems—Epidote Mineral Chemistry as a Tool for Vectoring and Fertility Assessments
Publisher: Society of Economic Geologists
Date: 2014
DOI: 10.5382/SP.18.07
From Source to Sinks in Auriferous Magmatic-Hydrothermal Porphyry and Epithermal Deposits
Publisher: Mineralogical Society of America
Date: 10-2009
Textures, trace elements, and Pb isotopes of sulfides from the Haopinggou vein deposit, southern North China Craton: implications for discrete Au and Ag–Pb–Zn mineralization
Publisher: Springer Science and Business Media LLC
Date: 19-11-2016
LA-ICP-MS trace element analysis of pyrite from the Chang'an gold deposit, Sanjiang region, China: Implication for ore-forming process
Publisher: Elsevier BV
Date: 09-2014
Marine Volcanosedimentary Basins Hosting Porphyry Au-Cu Deposits, Cadia Valley, New South Wales, Australia
Publisher: Society of Economic Geologists
Date: 17-03-2014
Epithermal and subjacent porphyry mineralization, Acupan, Baguio District, Philippines: a fluid-inclusion and paragenetic study
Publisher: Elsevier BV
Date: 1990
NEAR-INFRARED EFFECTIVENESS ON DEGRADED CORE IN TROPICAL CLIMATES
Publisher: Society of Economic Geologists
Date: 03-04-2017
Genesis and Exploration Implications of Epithermal Gold Mineralization and Porphyry-Style Alteration at the Endeavour 41 Prospect, Cowal District, New South Wales, Australia
Publisher: Society of Economic Geologists
Date: 17-03-2014
Chlorite chemistry as a new exploration tool in the propylitic halo of porphyry-epithermal systems: a case study of the Batu Hijau porphyry Cu-Au system, Indonesia
Publisher: Informa UK Limited
Date: 02-04-2016
Philippine Porphyry and Epithermal Deposits: An Introduction
Publisher: Society of Economic Geologists
Date: 17-11-2011
Fluid chemistry, structural setting, and emplacement history of the Rosario Cu-Mo porphyry and Cu-Ag-Au epithermal veins, Collahuasi district, northern Chile
Publisher: Society of Economic Geologists
Date: 08-2005
Distal Pb-Zn-Ag veins associated with the world-class Donggou porphyry Mo deposit, southern North China craton
Publisher: Elsevier BV
Date: 04-2017
Zircon O and Lu-Hf isotope evidence of mantle and supracrustal origins of Tasmanian Devonian granites
Publisher: Elsevier BV
Date: 10-2022
Geochemistry of Tertiary Igneous Rocks of Northern Luzon, Philippines: Evidence for a Back-Arc Setting for Alkalic Porphyry Copper-Gold Deposits and a Case for Slab Roll-Back?
Publisher: Society of Economic Geologists
Date: 17-11-2011
Five questions for fun and profit: A mineral system perspective on metallogenic epochs, provinces and magmatic hydrothermal Cu and Au deposits
Publisher: Springer Berlin Heidelberg
Date: 2005
Bismoclite (BiOCl) in the San Francisco de los Andes Bi–Cu–Au Deposit, Argentina. First Occurrence of a Bismuth Oxychloride in a Magmatic–Hydrothermal Breccia Pipe and Its Usefulness as an Indicator P
Publisher: MDPI AG
Date: 28-06-2016
DOI: 10.3390/MIN6030062
Geological, geochemical characteristics and isotope systematics of the Longqiao iron deposit in the Lu-Zong volcano-sedimentary basin, Middle-Lower Yangtze (Changjiang) River Valley, Eastern China
Publisher: Elsevier BV
Date: 12-2011
Epidote Trace Element Chemistry as an Exploration Tool in the Collahuasi District, Northern Chile
Publisher: Society of Economic Geologists
Date: 06-2020
DOI: 10.5382/ECONGEO.4739
Abstract: The Collahuasi district of northern Chile hosts several late Eocene-early Oligocene world-class porphyry Cu-Mo deposits, including Rosario, Ujina, and Quebrada Blanca deposits, and associated high-sulfidation epithermal mineralization at La Grande. Mineralization is hosted by intermediate to felsic intrusive and volcanic rocks of the upper Paleozoic to Lower Triassic Collahuasi Group, which experienced lower greenschist facies regional metamorphism prior to mineralization. Extensive hydrothermal alteration zones surround the porphyry and epithermal deposits, associated with hypogene ore-forming processes. However, outside of the observed sulfide halo the limits of geochemical anomalism associated with mineralization are difficult to define due to mineralogical similarities between weak, distal propylitic alteration and regional metamorphism affecting the host rocks. Recent advancements in laser ablation-inductively coupled plasma-mass spectrometry analysis of epidote from hydrothermal alteration zones around porphyry and skarn deposits have shown that low-level hypogene geochemical anomalies can be detected at distances farther from the center of mineralization than by conventional rock chip s ling. Selective analysis of propylitic epidote from the Collahuasi district indicates that anomalous concentrations of distal pathfinder elements in epidote, including As (& ppm), Sb (& ppm), Pb (& ppm), and Mn (& ,000 ppm), were detectable 1.5 to 4.0 km from deposit centers. Significantly, the concentrations of these trace elements in epidote were obtained from s les that contained whole-rock concentrations of & ppm As, & ppm Sb, & ppm Pb, and & ,000 ppm Mn. Systematic increases in Cu, Mo, and Sn concentrations in epidote near deposit centers, and corresponding decreasing As, Sb and Pb concentrations, also provide effective tools for assessing the fertility and locating the centers of porphyry mineralization. In addition, anomalous concentrations in epidote of Cu (up to 1 wt %) and Zn (up to 6,000 ppm) effectively discriminate epidote associated with high-sulfidation epithermal veins in the Collahuasi district (e.g., La Grande, Poderosa-Rosario) from alteration associated with porphyry mineralization.
Exploration Targeting in Porphyry Cu Systems Using Propylitic Mineral Chemistry: A Case Study of the El Teniente Deposit, Chile
Publisher: Society of Economic Geologists
Date: 06-2020
DOI: 10.5382/ECONGEO.4738
Abstract: The mineral chemistry of epidote and chlorite from the propylitic halo at El Teniente, in s les collected at distances up to 6.6 km from the deposit center, was determined by microprobe and laser ablation-inductively coupled plasma-mass spectrometry. Results show that both minerals systematically incorporated a range of trace elements that define a much larger footprint to the system than is easily recognized using conventional means such as whole-rock geochemistry. Apart from Fe and Mg in chlorite, there is no significant control of mineral chemistry by bulk-rock composition. For chlorite, geothermometry temperatures and Ti and V concentrations are high proximal, whereas Li, As, Co, Sr, Ca, and Y are low proximal and elevated in distal positions. Ratios of these elements define gradients toward ore varying over three to five orders of magnitude. The proximal-high Ti content is thought to reflect crystallization temperature, whereas proximal-low signatures are believed to characterize elements that are relatively fluid mobile in the inner parts of the propylitic halo in the presence of mildly alkaline to mildly acidic and oxidized fluids so that they are not incorporated into crystallizing chlorite, despite being generally compatible within the mineral structure. These elements begin to substitute into chlorite in the distal parts of the propylitic halo where fluids are largely rock buffered in terms of major element chemistry. In epidote, As defines a broad proximal low and is generally elevated at distances of at least 3 km from the edge of the ore shell. Zinc, La, Yb, Y, and Zr in epidote, among others, appear to define a geochemical shoulder that surrounds the deposit. These patterns are broadly similar to those observed in previous work at Batu Hijau and in the Baguio district, suggesting that these minerals behave consistently in porphyry systems and can therefore provide useful exploration tools within propylitic green rocks.
Assessment of magmatic fertility using pXRF on altered rocks from the Ordovician Macquarie Arc, New South Wales
Publisher: Informa UK Limited
Date: 03-08-2021
Multimillion year thermal history of a porphyry copper deposit: application of U-Pb, Ar-40/Ar-39 and (U-Th)/He chronometers, Bajo de la Alumbrera copper-gold deposit, Argentina
Publisher: Springer Science and Business Media LLC
Date: 16-08-2008
The chlorite proximitor: A new tool for detecting porphyry ore deposits
Publisher: Elsevier BV
Date: 05-2015
The Formation of Magmatic-Hydrothermal Features in Sn-Mineralized and Barren Tasmanian Intrusions, Southeast Australia: Insights from Quartz Textures, Trace Elements, and Microthermometry
Publisher: Society of Economic Geologists
Date: 12-2021
DOI: 10.5382/ECONGEO.4853
Abstract: Tasmania is the most important tin province in Australia, having been endowed with & .65 Mt Sn. Some granitic intrusions in western Tasmania have distinctive tourmaline- and quartz-rich magmatic-hydrothermal features, whether they are mineralized (e.g., Heemskirk Granite) or barren (Pieman Heads Granite). The Devonian Heemskirk and Pieman Heads plutons crop out on the western coast of Tasmania and are characterized by similar mineralogical and geochemical compositions and ages. The magmatic-hydrothermal textural features include tourmaline patches, tourmaline orbicules, and tourmaline-muscovite veins, as well as miarolitic cavities and quartz-fluorite-sulfide veins in the Heemskirk Granite. Cathodoluminescence (CL) imaging, laser ablation-inductively coupled plasma-mass spectrometry, and microthermometric analyses of quartz have revealed the physicochemical evolution of the magmatic-hydrothermal fluids from which these tourmaline- and quartz-bearing assemblages precipitated. High Ti quartz (20–28 ppm) in tourmaline patches, orbicules, and cavities typically have homogeneous CL-bright intensity, whereas CL-dark fractures have cut and/or offset the CL-bright and -gray domains that characterize low Ti quartz (3.4–8.5 ppm) from the tourmaline veins. The earliest fluid inclusion assemblages in the quartz-tourmaline orbicules and cavities have a salinity range from 3 to 14 wt % NaCl equiv with intermediate density and were probably trapped at lithostatic pressures of 1.57 ± 0.2 kbar and temperatures of 550° to 570°C, suggesting a depth of 5.9 ± 0.8 km. Prolonged depressurization and cooling may have led to the evolution of a brine (~39 wt % NaCl equiv salinity) from the primary magmatic liquid, which formed halite-bearing hypersaline inclusions in the tourmaline orbicules. Continuous pressure decrease explains the intense brittle failure and fluid migration outward from the apical portions of the pluton, where magmatic fluids partially mixed with and were cooled by external meteoric water. These mechanisms triggered the formation of tourmaline-muscovite-quartz veins and local cassiterite-bearing greisens from a moderate-salinity fluid (~12 wt % NaCl equiv) at temperatures of ~300°C and hydrostatic pressures of 120 bars. Retrograde dissolution textures evident from CL-bright quartz cores surrounded by oscillatory growth zones with gray CL response characterize the low Ti (& ppm) and high Al (500–1,000 ppm) quartz from the fluorite-sulfide veins that precipitated from a low-salinity (5.7 wt % NaCl equiv) acidic fluid at temperatures of 200° ± 25°C and hydrostatic pressures of & bars. High Sb concentrations (up to 80 ppm) in quartz may be an indicator of low-temperature base metal mineralization related to granitic intrusions. Abundant fluid percolation, protracted fractional crystallization, and high tin concentrations in exsolved hydrothermal fluids may explain why the Heemskirk Granite is well endowed in Sn and base metal deposits, whereas the Pieman Heads Granite is barren.
Using Mineral Chemistry to Aid Exploration: A Case Study from the Resolution Porphyry Cu-Mo Deposit, Arizona
Publisher: Society of Economic Geologists
Date: 06-2020
DOI: 10.5382/ECONGEO.4735
Abstract: The giant, high-grade Resolution porphyry Cu-Mo deposit in the Superior district of Arizona is hosted in Proterozoic and Paleozoic basement and in an overlying Cretaceous volcaniclastic breccia and sandstone package. Resolution has a central domain of potassic alteration that extends more than 1 km outboard of the ore zone, overlapping with a propylitic halo characterized by epidote, chlorite, and pyrite that is particularly well developed in the Laramide volcaniclastic rocks and Proterozoic dolerite sills. The potassic and propylitic assemblages were overprinted in the upper parts of the deposit by intense phyllic and advanced argillic alteration. The district was disrupted by Tertiary Basin and Range extension, and the fault block containing Resolution and its Cretaceous host succession was buried under thick mid-Miocene dacitic volcanic cover, obscuring the geologic, geophysical, and geochemical footprint of the deposit. To test the potential of propylitic mineral chemistry analyses to aid in the detection of concealed porphyry deposits, a blind test was conducted using a suite of epidote-chlorite ± pyrite-altered Laramide volcaniclastic rocks and Proterozoic dolerites collected from the propylitic halo, with s les taken from two domains located to the north and south and above the Resolution ore zone. Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) data of epidote provided indications of deposit fertility and proximity. Competition for chalcophile elements (As, Sb, Pb) between coexisting pyrite and epidote grains led to a subdued As-Sb fertility response in epidote, consistent with epidote collected between 0.7 and 1.5 km from the center of a large porphyry deposit. Temperature-sensitive trace elements in chlorite provided coherent spatial zonation patterns, implying a heat source centered at depth between the two s le clusters, and application of chlorite proximitor calculations based on LA-ICP-MS analyses provided a precisely defined drill target in this location in three dimensions. Drilling of this target would have resulted in the discovery of Resolution, confirming that epidote and chlorite mineral chemistry can potentially add value to porphyry exploration under cover.
Complex Petrogenesis of Porphyry-Related Magmas in the Cowal District, Australia: Insights from LA ICP-MS Zircon Imaging
Publisher: Society of Economic Geologists
Date: 2021
DOI: 10.5382/SP.24.10
Abstract: Zircon-based laser ablation inductively coupled plasma-mass spectrometry (LA ICP-MS) trace element imaging and spot analysis methods are used to investigate the petrogenesis of porphyry Cu-related magmas in the Cowal district, Australia. These data discriminate premineralization magmas from synmineralization fertile magmas and provide insights into a complex petrogenesis that culminated in low-temperature, hydrous, and oxidized magma compositions. The intragrain trace element distribution in zircons from synmineralization intrusions spatially correlates with abrupt changes in zircon textures demarked by dissolution surfaces. Mapping of key fractionation, temperature, hygrometer, and oxybarometer indices (e.g., Th/U, Gd/Yb, (Ce/Nd)/Yb, and Eu/Eu*) show in some cases that multiple crystal-fractionation events, including the cofractionation of titanite, apatite, and hornblende, are recorded in single zircon grains spatially separated by dissolution surfaces. These resorbed boundaries are interpreted to record periods of discrete magma recharge events that affected the temperature and trace element budget of the magma. In many cases, the highest relative magmatic water content and highest oxidation signature are concentrated near the crystal rims, which suggests magmatic fertility increased late during the evolution of these magmas—evidently triggered as a result of magma recharge. An evolution to cooler, hydrous, oxidized conditions with transient periods of magma recharge and higher temperature conditions are considered prerequisites for fertile magma petrogenesis in the Cowal district. The relationship between zircon complexity and fertility should be a useful tool for zircon-based fertility studies informed by cathodoluminescence imagery.
Unsupervised clustering of LA-ICP-MS raster map data for geological interpretation: A case study using epidote from the Yerington district, Nevada
Publisher: Elsevier BV
Date: 12-2020
Geochronological, geochemical and Pb isotopic compositions of Tasmanian granites (southeast Australia): Controls on petrogenesis, geodynamic evolution and tin mineralisation
Publisher: Elsevier BV
Date: 06-2017
Magmatic Precursors of Hydrothermal Fluids at the Rio Blanco Cu-Mo Deposit, Chile: Links to Silicate Magmas and Metal Transport
Publisher: Society of Economic Geologists
Date: 08-2005
Propylitic alteration and metal mobility in porphyry systems: a case study of the Northparkes Cu-Au deposits, NSW, Australia
Publisher: Informa UK Limited
Date: 02-04-2016
The Trace Metal Chemistry of Deep Geothermal Water, Palinpinon Geothermal Field, Negros Island, Philippines: Implications for Precious Metal Deposition in Epithermal Gold Deposits
Publisher: Society of Economic Geologists
Date: 17-11-2011
K-metasomatism and base metal depletion in volcanic rocks from the McArthur Basin, Northern Territory; implications for base metal mineralization
Publisher: Society of Economic Geologists
Date: 12-1998
The effects of hardpan layers on the water chemistry from the leaching of pyrrhotite-rich tailings material
Publisher: Springer Science and Business Media LLC
Date: 09-2003
Epithermal Au-Ag-Te Mineralization, Acupan, Baguio District, Philippines: Numerical Simulations of Mineral Deposition
Publisher: Society of Economic Geologists
Date: 2001
DOI: 10.2113/96.1.109
Interpreting element addition and depletion at the Ann Mason porphyry-Cu deposit, Nevada, using mapped mass balance patterns
Publisher: Elsevier BV
Date: 2019
Geoenvironmental characterisation of legacy mine wastes from Tasmania – Environmental risks and opportunities for remediation and value recovery
Publisher: Elsevier BV
Date: 07-2023
Lithofacies Associations and Evolution of the Volcanic Host Succession to the Minifie Ore Zone: Ladolam Gold Deposit, Lihir Island, Papua New Guinea
Publisher: Society of Economic Geologists
Date: 17-03-2014
Alunite in the Pascua-Lama High-Sulfidation Deposit: Constraints on Alteration and Ore Deposition Using Stable Isotope Geochemistry
Publisher: Society of Economic Geologists
Date: 2005
DOI: 10.2113/100.1.0131
Diatreme Breccias at the Kelian Gold Mine, Kalimantan, Indonesia: Precursors to Epithermal Gold Mineralization
Publisher: Society of Economic Geologists
Date: 06-2008
Multidisciplinary characterisation of groundwater flow and contaminant transport in legacy mine wastes, Endurance Mine, northeast Tasmania
Publisher: European Association of Geochemistry
Date: 2022
Ultra-Deep Oxidation and Exotic Copper Formation at the Late Pliocene Boyongan and Bayugo Porphyry Copper-Gold Deposits, Surigao, Philippines: Geology, Mineralogy, Paleoaltimetry, and their Implicatio
Publisher: Society of Economic Geologists
Date: 05-2009
Platinum-group element geochemistry used to determine Cu and Au fertility in the Northparkes igneous suites, New South Wales, Australia
Publisher: Elsevier BV
Date: 07-2110
Along-strike segmentation of the Abanico Basin, central Chile: New chronological, geochemical and structural constraints
Publisher: Elsevier BV
Date: 2017
Hydrothermal Breccias and Veins at the Kelian Gold Mine, Kalimantan, Indonesia: Genesis of a Large Epithermal Gold Deposit
Publisher: Society of Economic Geologists
Date: 06-2008
Geochronology of the volcanic rocks in the Lu-Zong basin and its significance
Publisher: Springer Science and Business Media LLC
Date: 10-2008
Introduction to the Special Issue Devoted to Alkalic Porphyry Cu-Au and Epithermal Au Deposits
Publisher: Society of Economic Geologists
Date: 17-03-2014
The Boyongan porphyry Cu-Au deposit: Repeated hydrothermal cycles tied to discrete intrusive events
Publisher: Springer Berlin Heidelberg
Date: 2005
The Rosario porphyry Cu-Mo deposit, northern Chile: Hypogene upgrading during gravitational collapse of the Domeyko Cordillera
Publisher: Springer Berlin Heidelberg
Date: 2005
Four million years of thermal history—the Bajo de la Alumbrera porphyry Cu–Au deposit, Argentina
Publisher: Elsevier BV
Date: 08-2006
A preliminary investigation and evaluation of the thallium environmental impacts of the unmined Xiangquan thallium-only deposit in Hexian, China
Publisher: Springer Science and Business Media LLC
Date: 20-06-2007
A genetic model for the H.Y.C. Deposit, Australia; based on regional sedimentology, geochemistry, and sulfide-sediment relationships
Publisher: Society of Economic Geologists
Date: 12-1998
Phenocryst zonation in porphyry-related rocks of the Baguio District, Philippines: Evidence for magmatic and metallogenic processes
Publisher: Oxford University Press (OUP)
Date: 05-2018
The Productora Cu-Au-Mo Deposit, Chile: A Mesozoic Magmatic-Hydrothermal Breccia Complex with Both Porphyry and Iron Oxide Cu-Au Affinities
Publisher: Society of Economic Geologists
Date: 05-2020
DOI: 10.5382/ECONGEO.4718
Abstract: The Productora Cu-Au-Mo deposit is hosted by a Cretaceous hydrothermal breccia complex in the Coastal Cordillera of northern Chile. The current resource, which includes the neighboring Alice Cu-Mo porphyry deposit, is estimated at 236.6 Mt grading 0.48% Cu, 0.10 g/t Au, and 135 ppm Mo. Local wall rocks consist of a thick sequence of broadly coeval rhyolite to rhyodacite lapilli tuffs (128.7 ± 1.3 Ma U-Pbzircon) and two major intrusions: the Cachiyuyito tonalite and Ruta Cinco granodiorite batholith (92.0 ± 1.0 Ma U-Pbzircon). Previous studies at Productora concluded the deposit had strong affinities with the iron oxide copper-gold (IOCG) clan and likened the deposit to Candelaria. Based on new information, we document the deposit geology in detail and propose a new genetic model and alternative classification as a magmatic-hydrothermal breccia complex with closer affinities to porphyry systems. Hydrothermal and tectonic breccias, veins, and alteration assemblages at Productora define five paragenetic stages: stage 1 quartz-pyrite–cemented breccias associated with muscovite alteration, stage 2 chaotic matrix-supported tectonic-hydrothermal breccia with kaolinite-muscovite-pyrite alteration, stage 3 tourmaline-pyrite-chalcopyrite ± magnetite ± biotite-cemented breccias and associated K-feldspar ± albite alteration, stage 4 chalcopyrite ± pyrite ± muscovite, illite, epidote, and chlorite veins, and stage 5 calcite veins. The Productora hydrothermal system crosscuts earlier-formed sodic-calcic alteration and magnetite-apatite mineralization associated with the Cachiyuyito stock. Main-stage mineralization at Productora was associated with formation of the stage 3 hydrothermal breccia. Chalcopyrite is the dominant hypogene Cu mineral and occurs predominantly as breccia cement and synbreccia veins with pyrite. The Alice Cu-Mo porphyry deposit is characterized by disseminated chalcopyrite and quartz-pyrite-chalcopyrite ± molybdenite vein stockworks hosted by a granodiorite porphyry stock. Alice is spatially associated with the Silica Ridge lithocap, which is characterized by massive, fine-grained, quartz-altered rock above domains of alunite, pyrophyllite, and dickite. Rhenium-Os dating of molybdenite indicates that main-stage mineralization at Productora occurred at 130.1 ± 0.6 Ma, and at 124.1 ± 0.6 Ma in the Alice porphyry. Chalcopyrite and pyrite from Productora have δ34Ssulfide values from –8.5 to +2.2‰, consistent with a magmatic sulfur source and fluids evolving under oxidizing conditions. No significant input from evaporite- or seawater-sourced fluids was detected. Stage 3 tourmalines have average initial Sr of 0.70397, consistent with an igneous-derived Sr source. The Productora magmatic-hydrothermal breccia complex formed as a result of explosive volatile fluid release from a hydrous intrusive complex. Metal-bearing fluids were of magmatic affinity and evolved under oxidizing conditions. Despite sharing many similarities with the Andean IOCG clan (strong structural control, regional sodic-calcic alteration, locally anomalous U), fluid evolution at the Productora Cu-Au-Mo deposit is more consistent with that of a porphyry-related magmatic hydrothermal breccia (sulfur-rich, acid alteration assemblages and relatively low magnetite contents, & vol %). The Productora c is an excellent ex le of the close spatial association of Mesozoic magnetite-apatite, porphyry, and magmatic-hydrothermal breccia mineralization styles, a relationship seen throughout the Coastal Cordillera of northern Chile.
Application of alkaline industrial wastes in the remediation of acid and metalliferous drainage generated by legacy mine wastes
Publisher: European Association of Geochemistry
Date: 2021
Large Paleozoic and Mesozoic porphyry deposits in the Central Asian Orogenic Belt: Geodynamic settings, magmatic sources, and genetic models
Publisher: Elsevier BV
Date: 06-2018
Physicochemical Conditions of Formation for Bismuth Mineralization Hosted in a Magmatic-Hydrothermal Breccia Complex: An Example from the Argentine Andes
Publisher: MDPI AG
Date: 26-10-2018
DOI: 10.3390/MIN8110486
Abstract: The San Francisco de los Andes breccia-hosted deposit (Frontal Cordillera, Argentina) is characterized by complex Bi–Cu–Pb–Zn–Mo–As–Fe–Ag–Au mineralization. After magmatic-hydrothermal brecciation, tourmaline and quartz partially cemented open spaces, followed by quiescent periods where Bi–Cu–Pb–Zn ore formed. Bismuth ore precipitation is characterized by Bi-sulfides, sulfosalts, and tellurosulfide inclusions, which temporally co-exist with Ag-telluride inclusions and chalcopyrite. Three distinct Bi mineralizing stages have been defined based on the following mineral assemblages: (1) Bismuthinite (tetradymite–hessite inclusions) (2) Bismuthinite (tetradymite–hessite inclusions) + cosalite (tetradymite inclusions) + chalcopyrite and (3) Cosalite (tetradymite inclusions) + chalcopyrite. Overall, Ag-poor bismuthinite hosts both Bi-tellurosulfide and Ag-telluride inclusions, whereas Ag-rich cosalite only hosts tetradymite inclusions.
Quantifying Exhumation at the Giant Pulang Porphyry Cu-Au Deposit Using U-Pb-He Dating
Publisher: Society of Economic Geologists
Date: 08-2018
Geochemistry of the Xiangquan Thallium deposit, China
Publisher: Elsevier BV
Date: 08-2006
Geological and structural controls on gold mineralization in the Tanami District, Northern Territory
Publisher: Springer Science and Business Media LLC
Date: 11-11-2006
U-Pb and Re-Os Geochronologic Evidence for Two Alkalic Porphyry Ore-Forming Events in the Cadia District, New South Wales, Australia
Publisher: Society of Economic Geologists
Date: 2007
Vertical and Lateral Variation of Mineralogy and Chemistry in the Early Jurassic Mt. Milligan Alkalic Porphyry Au-Cu Deposit, British Columbia, Canada
Publisher: Society of Economic Geologists
Date: 17-03-2014
Mineralogical and Isotopic Zonation in the Sur-Sur Tourmaline Breccia, Rio Blanco-Los Bronces Cu-Mo Deposit, Chile: Implications for Ore Genesis
Publisher: Society of Economic Geologists
Date: 08-2005
Exploration Tools for Linked Porphyry and Epithermal Deposits: Example from the Mankayan Intrusion-Centered Cu-Au District, Luzon, Philippines*
Publisher: Society of Economic Geologists
Date: 12-2011
Potential Use of Industrial Wastes in the Treatment of Mine Wastes: A Case Study of Legacy Mine Sites in Tasmania
Publisher: Geochemical Society
Date: 2020
A Model for the Lithospheric Architecture of the Central Andes and the Localization of Giant Porphyry Copper Deposit Clusters
Publisher: Society of Economic Geologists, Inc.
Date: 09-2023
DOI: 10.5382/ECONGEO.5010
Abstract: In the central Andes, giant porphyry copper deposits of similar ages group into discrete geographic clusters that are regularly spaced and aligned within orogen-parallel belts. This clustering highlights how exceptional geologic processes affected localized regions of the lithosphere during mineralization and that the spatial and temporal distribution of giant porphyry deposits is nonrandom. Development of favorable regions of lithosphere for significant metal concentration are linked to the overlap of structural pathways that focus fluid and magma flow from the mantle to upper crust during high-horizontal-compressive-strain events. These structural pathways are notoriously difficult to identify in the field due to their often-subtle surficial manifestations and continental scale. Field mapping at multiple scales in northwest Argentina and southern Peru, as well as regional structural traverses throughout the central Andes, indicates the presence of regional-scale structural corridors 5 to 25 km wide and hundreds of km long that consist of myriad fault planes. The variable width and diffuse surface expression of these corridors is interpreted to reflect the upward propagation of underlying zones of basement weakness through younger supracrustal sequences in the overriding plate. Such structural corridors are (1) apparent at multiple scales of investigation, (2) long-lived, (3) preferentially reactivated though time, and (4) evident in geophysical data sets. This structural architecture formed in response to the interplay of pre-Cenozoic tectonics and the orientation of inherited structural weaknesses. These fault systems persist in the upper crust as steep zones of enhanced permeability that can preferentially reactivate as pathways for ascending hydrous magmas and fluids during major deformation events. Linear orogen-parallel structural belts cogenetic with the magmatic arc provide the first-order control to giant porphyry copper deposit distribution. The second-order control is the intersection of orogen-oblique structural corridors with the orogen-parallel belts, localizing deposit clusters at these intersections. Such regions are inferred to have been zones of deep permeability, with vertical translithospheric pathways activated during high-strain tectonic events that affected the intra-arc stress field.
Ordovician Intrusive‐related Gold‐Copper Mineralization in West‐Central New South Wales, Australia
Publisher: Wiley
Date: 12-2000
Geochemical Modeling of the Zoned Footwall Alteration Pipe,Hellyer Volcanic-Hosted Massive Sulfide Deposit, Western Tasmania,Australia
Publisher: Society of Economic Geologists
Date: 08-2001
The Ridgeway Gold-Copper Deposit: A High-Grade Alkalic Porphyry Deposit in the Lachlan Fold Belt, New South Wales, Australia
Publisher: Society of Economic Geologists
Date: 12-2003
Porphyry Au-Cu mineralization controlled by reactivation of an arc-transverse volcanosedimentary subbasin
Publisher: Geological Society of America
Date: 28-07-2015
DOI: 10.1130/G36992.1
B- and O-isotopic compositions of tourmaline constrain late-stage magmatic volatile exsolution in Tasmanian tin-related granite systems
Publisher: Springer Science and Business Media LLC
Date: 27-04-2019
Micro- and nano-scale textural and compositional zonation in plagioclase at the Black Mountain porphyry Cu deposit: Implications for magmatic processes
Publisher: Mineralogical Society of America
Date: 03-2019
DOI: 10.2138/AM-2019-6609
Geochemistry of Porphyry Deposits
Publisher: Elsevier
Date: 2014
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