ORCID Profile
0000-0002-4430-4212
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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.
Surface Processes | Seismology and Seismic Exploration | Natural Hazards | Structural Geology | Geology | Geodynamics | Physical Geography and Environmental Geoscience | Tectonics
Natural Hazards not elsewhere classified | Expanding Knowledge in the Earth Sciences | Mineral Exploration not elsewhere classified |
Publisher: Geological Society of London
Date: 2010
DOI: 10.1144/SP346.13
Publisher: Elsevier BV
Date: 05-2017
Publisher: American Chemical Society (ACS)
Date: 08-2023
Publisher: Springer Science and Business Media LLC
Date: 05-07-2019
Publisher: American Geophysical Union (AGU)
Date: 22-07-2022
DOI: 10.1029/2022GL099155
Abstract: The Nullarbor Plain is underlain by thick cratonic lithospheric mantle that is almost devoid of contemporary seismicity. Analysis of high‐resolution digital elevation models indicates neotectonic fault‐propagation fold traces on the nearly flat karst landscape that locally extend to lengths of km, suggesting potential for hosting large ( .3–7.5) moment magnitude earthquakes. Along‐strike maximum displacements are not proportional to neotectonic fold surface trace length but are spatially associated with crust‐scale electrical conductors identified in magnetotelluric surveys. Two major conductors penetrate from the upper crust to the uppermost mantle (at depths 60 km) along crustal scale shear zones. Conductivity in the uppermost mantle shear zones is higher than conductivity at increased depth, suggesting fluid‐enhanced enrichment with hydrogen and/or carbon. Lithospheric fluid localization associated with ancient slab subduction and/or hydrothermal alteration may have weakened pre‐existing faults and enhanced neotectonic faulting in the Nullarbor Plain.
Publisher: Elsevier BV
Date: 2020
Publisher: Elsevier BV
Date: 12-2017
Publisher: American Geophysical Union (AGU)
Date: 04-2023
DOI: 10.1029/2022JB024358
Abstract: The fast‐slipping Alpine (∼30 mm/yr), Hope (∼10–20 mm/yr) and Kelly (∼6 mm/yr) faults in the South Island of New Zealand form a complex intersection zone that accommodates tectonic strain along the Australian‐Pacific plate boundary. Analysis of digital topography reveals evidence for stream capture, drainage ide migration, landscape responses to incipient fault development, and preserved enclaves of relic topography that collectively reflect complex interplays between active faulting and landscape evolution. (U‐Th)/He thermochronology of zircon (ZHe) and apatite (AHe) is used to investigate the low‐temperature thermal evolution of rocks in the intersection zone. Weighted mean s le ages for ZHe single grain ages ( n = 13 s les) range from ∼9 to 2 Ma, and AHe multi‐grain and single grain aliquot ages ( n = 9 s les) range from ∼1.5 to 0.5 Ma. Inverse and forward thermal history modeling reveals distinct spatiotemporal variations in thermal histories. Late Miocene exhumation rates (∼0.6–3.5 km/Myr, assuming geothermal gradients of 33–40 °C/km) through crustal depths of approximately 5–6 km, are interpreted to be controlled by proximity to the Alpine fault, with rocks proximal to the fault recording faster exhumation rates relative to distal s les. Establishment of the Hope‐Kelly fault system in the Quaternary structurally juxtaposed rocks with discordant cooling histories. Rocks throughout the study region record increased cooling rates from ∼2 Ma. Possible causal mechanisms include, spatial changes in rock uplift associated with transport toward the Alpine Fault, increased erosion rates associated with Quaternary climate change, or increased rock mass erodibility associated with development of the Hope‐Kelly fault system.
Publisher: Elsevier BV
Date: 09-2007
Publisher: Geological Society of America
Date: 17-02-2017
DOI: 10.1130/B31373.1
Publisher: American Geophysical Union (AGU)
Date: 17-11-2005
DOI: 10.1029/2004TC001679
Publisher: Elsevier BV
Date: 11-2022
Publisher: Elsevier BV
Date: 09-2019
Publisher: Elsevier BV
Date: 03-2016
Publisher: American Geophysical Union (AGU)
Date: 06-2013
DOI: 10.1002/TECT.20048
Publisher: California Digital Library (CDL)
Date: 08-10-2018
Publisher: SAGE Publications
Date: 12-07-2010
Abstract: New high-resolution MC-ICPMS U/Th ages and C and O isotopic analyses from a Holocene speleothem in arid south-central Australia provide evidence for increased effective precipitation (EP) relative to present at c. 11.5 ka and c. 8—5 ka, peak moisture at 7—6 ka, and onset of an arid climate similar to present by c. 5 ka. δ 18 O and δ 13 C time-series data exhibit marked ( +1‰) contemporaneous excursions over base-line values of −5.3‰ and −11.0‰, respectively, suggesting pronounced moisture variability during the early middle Holocene ‘climatic optimum’. Optically stimulated luminescence and 14 C ages from nearby terraced aggradational alluvial deposits indicate a paucity of large floods in the Late Pleistocene and at least five large flood events in the last c. 6 kyr, interpreted to mark an increased frequency of extreme rainfall events in the middle Holocene despite overall reduced EP. Increased EP in south-central Australia during the early to middle Holocene resulted from (1) decreased El Niño-Southern Oscillation (ENSO) variability, which reduced the frequency of El Niño-triggered droughts, (2) the prevalence of a more La Niña-like mean climatic state in the tropical Pacific Ocean, which increased available atmospheric moisture, and (3) a southward shift in the Intertropical Convergence Zone (ICTZ), which allowed tropical summer storms associated with the Australian summer monsoon (ASM) to penetrate deeper into the southern part of the continent. The onset of heightened aridity and apparent increase in large flood frequency at c. 5 ka is interpreted to indicate the establishment of an ENSO-like climate in arid Australia in the late Holocene, consistent with a variety of other terrestrial and marine proxies. The broad synchroneity of Holocene climate change across much of the Australian continent with changes in ENSO behavior suggests strong teleconnections amongst ENSO and the other climate systems such as the ASM, Indian Ocean Dipole, and Southern Annular Mode.
Publisher: Informa UK Limited
Date: 04-2006
Publisher: Wiley
Date: 20-09-2007
Publisher: Seismological Society of America (SSA)
Date: 12-05-2020
DOI: 10.1785/0120190266
Abstract: The 20 May 2016 surface-rupturing intraplate earthquake in the Petermann Ranges is the largest onshore earthquake to occur in the Australian continent in 19 yr. We use in situ and Interferometric Synthetic Aperture Radar surface observations, aftershock distribution, and the fitting of P-wave source spectra to determine source properties of the Petermann earthquake. Surface observations reveal a 21-km-long surface rupture trace (strike=294°±29°) with heterogeneous vertical displacements (& .1–0.96 m). Aftershock arrays suggest a triangular-shaped rupture plane (dip ≈ 30°) that intersects the subsurface projection of the major geophysical structure (Woodroffe thrust [WT]) proximal to the preferred location of the mainshock hypocenter, suggesting the mainshock nucleated at a fault junction. Footwall seismicity includes apparent southwest-dipping Riedel-type alignments, including possible activation of the deep segment of the WT. We estimate a moment magnitude (Mw) of 6.0 and a corner frequency (fc) of 0.2 Hz, respectively, from spectral fitting of source spectra in the 0.02–2 Hz frequency band. These translate into a fault area of 124 km2 and an average slip of 0.36 m. The estimated stress drop of 2.2 MPa is low for an intraplate earthquake we attribute this to low-frictional slip (effective coefficient of friction & .015) along rupture-parallel phyllosilicate-rich surfaces within the host rock fabric with possible additional contributions from elevated pore-fluid pressures.
Publisher: American Geophysical Union (AGU)
Date: 07-12-2010
DOI: 10.1029/2010EO490001
Publisher: Wiley
Date: 05-05-2013
DOI: 10.1002/ESP.3427
Publisher: MDPI AG
Date: 23-03-2020
DOI: 10.3390/GEOSCIENCES10030114
Abstract: Earthquakes can influence flood hazards by altering the flux, volumes, and distributions of surface and/or subsurface waters and causing physical changes to natural and engineered environments (e.g., elevation, topographic relief, permeability) that affect surface and subsurface hydrologic regimes. This paper analyzes how earthquakes increased flood hazards in Christchurch, New Zealand, using empirical observations and seismological data. Between 4 September 2010 and 4 December 2017, this region hosted one moment magnitude (Mw) 7.1 earthquake, 3 earthquakes with Mw ≥ 6, and 31 earthquakes with local magnitude (ML) ≥ 5. Flooding related to liquefaction-induced groundwater pore-water fluid pressure perturbations and groundwater expulsion occurred in at least six earthquakes. Flooding related to shaking-induced ground deformations (e.g., subsidence) occurred in at least four earthquakes. Flooding related to tectonic deformations of the land surface (fault surface rupture and/or folding) occurred in at least two earthquakes. At least eight earthquakes caused damage to surface (e.g., buildings, bridges, roads) and subsurface (e.g., pipelines) infrastructure in areas of liquefaction and/or flooding. Severe liquefaction and associated groundwater-expulsion flooding in vulnerable sediments occurred at peak ground accelerations as low as 0.15 to 0.18 g (proportion of gravity). Expected return times of liquefaction-induced flooding in vulnerable sediments were estimated to be 100 to 500 years using the Christchurch seismic hazard curve, which is consistent with emerging evidence from paleo-liquefaction studies. Liquefaction-induced subsidence of 100 to 250 mm was estimated for 100-year peak ground acceleration return periods in parts of Christchurch.
Publisher: Geological Society of America
Date: 02-2013
DOI: 10.1130/G33420.1
Publisher: Elsevier BV
Date: 06-2010
Publisher: Elsevier BV
Date: 08-2006
Publisher: Wiley
Date: 10-2016
DOI: 10.1002/JQS.2895
Publisher: Geological Society of London
Date: 08-2011
Publisher: Geological Society of America
Date: 21-12-2012
DOI: 10.1130/B30753.1
Publisher: Wiley
Date: 03-05-2021
DOI: 10.1002/ESP.5090
Abstract: The 20 May 2016 M W 6.1 Petermann earthquake in central Australia generated a 21 km surface rupture with 0.1 to 1 m vertical displacements across a low‐relief landscape. No paleo‐scarps or potentially analogous topographic features are evident in pre‐earthquake Worldview‐1 and Worldview‐2 satellite data. Two excavations across the surface rupture expose near‐surface fault geometry and mixed aeolian‐sheetwash sediment faulted only in the 2016 earthquake. A 10.6 ± 0.4 ka optically stimulated luminescence (OSL) age of sheetwash sediment provides a minimum estimate for the period of quiescence prior to 2016 rupture. Seven cosmogenic beryllium‐10 ( 10 Be) bedrock erosion rates are derived for s les 5 km distance from the surface rupture on the hanging‐wall and foot‐wall, and three from s les 19 to 50 km from the surface rupture. No distinction is found between fault proximal rates (1.3 ± 0.1 to 2.6 ± 0.2 m Myr −1 ) and distal s les (1.4 ± 0.1 to 2.3 ± 0.2 m Myr −1 ). The thickness of rock fragments (2–5 cm) coseismically displaced in the Petermann earthquake perturbs the steady‐state bedrock erosion rate by only 1 to 3%, less than the erosion rate uncertainty estimated for each s le (7–12%). Using 10 Be erosion rates and scarp height measurements we estimate approximately 0.5 to 1 Myr of differential erosion is required to return to pre‐earthquake topography. By inference any pre‐2016 fault‐related topography likely required a similar time for removal. We conclude that the Petermann earthquake was the first on this fault in the last ca. 0.5–1 Myr. Extrapolating single nuclide erosion rates across this timescale introduces large uncertainties, and we cannot resolve whether 2016 represents the first ever surface rupture on this fault, or a 1 Myr interseismic period. Either option reinforces the importance of including distributed earthquake sources in fault displacement and seismic hazard analyses.
Publisher: Geological Society of America
Date: 23-11-2012
DOI: 10.1130/G32528.1
Publisher: American Geophysical Union (AGU)
Date: 27-09-2021
DOI: 10.1029/2021EO163702
Abstract: Brutal university cuts are putting at risk an industry crucial to addressing climate change Down Under and around the world. Saving geoscience will require a community reckoning.
Publisher: Elsevier BV
Date: 11-2018
Publisher: American Geophysical Union (AGU)
Date: 09-2019
DOI: 10.1029/2019GL084926
Publisher: Wiley
Date: 10-03-2011
DOI: 10.1002/ESP.2058
Publisher: California Digital Library (CDL)
Date: 05-09-2019
Publisher: Springer Science and Business Media LLC
Date: 05-04-2019
Publisher: California Digital Library (CDL)
Date: 09-08-2019
Publisher: Geological Society of London
Date: 2008
DOI: 10.1144/SP306.3
Publisher: California Digital Library (CDL)
Date: 17-08-2019
Publisher: Wiley
Date: 2007
DOI: 10.1002/ESP.1459
Publisher: California Digital Library (CDL)
Date: 17-08-2019
Publisher: Wiley
Date: 10-2016
DOI: 10.1002/JQS.2905
Publisher: Informa UK Limited
Date: 02-08-2012
Publisher: Wiley
Date: 11-01-2022
Publisher: Geological Society of America
Date: 21-06-2022
DOI: 10.1130/G50061.1
Abstract: The San Andreas fault (California, USA) is near vertical at shallow (& km) depth. Geophysical surveys along the San Andreas fault reveal that, at depths of 10–20 km, it dips ~50–70° to the southwest near the Western Transverse Ranges and dips northeast in the San Gorgonio region. We investigate the possible origin of along-strike geometric variations of the fault using a three-dimensional thermomechanical model. For two blocks separated by transpressional faults, our model shows that viscous lower crustal material moves from the high-viscosity block into the low-viscosity block. Fault plane-normal flow in the viscous lower crust rotates the fault plane due to the simple shear flow at the brittle-ductile transition depth. This occurs irrespective of initial fault dip direction. Rheological variations used to model the lower crust of Southern California are verified by independent observations. Block extrusion due to lower crustal viscosity variation facilitates the formation of the Garlock Fault and sustains the geometric complexity of the fault.
Publisher: Elsevier BV
Date: 09-2009
Publisher: Springer Science and Business Media LLC
Date: 19-08-2022
DOI: 10.1007/S10669-022-09875-X
Abstract: ‘Science’ is a proportionately small but recurring constituent in the rhetorical lexicon of political leaders. To evaluate the use of science-related content relative to other themes in political communications, we undertake a statistical analysis of keywords in U.S. Presidential State of the Union (SOTU) addresses and Presidential Budget Messages (PBM) from Truman (1947) to Trump (2020). Hierarchical clustering and correlation analyses reveal proximate affinities between ‘science’ and ‘research’, ‘space’, ‘technology’, ‘education’ , and ‘climate’ . The keywords that are least correlated with ‘science’ relate to fiscal (‘inflation’, ‘tax’ ) and conflict-related themes ( ‘security’, ‘war’, ‘terror’ ). The most ubiquitous and frequently used keywords are ‘economy’ and ‘tax’ . Science-related keywords are used in a positive (promotional) rhetorical context and thus their proportionality in SOTU and PBM corpora is used to define fields of science advocacy ( public perception advocacy, funding advocacy, advocacy ) for each president. Monte Carlo simulations and randomized s ling of three elements: language (relative frequency of usage of science-related keywords), funding (proposed funding and allocated discretionary funding of science agencies), and actions (e.g. expediency of science advisor appointments, (dis-) establishment of science agencies) are used to generate a science advocacy score (SAS) for each president. The SAS is compared with independent survey-based measures of political popularity. A myriad of political, contextual, and other factors may contribute to lexical choices, policy, and funding actions. Within this complex environment ‘ science ’ may have political currency under certain circumstances, particularly where public and political perceptions of the value of science to contribute to matters of priority align.
Publisher: California Digital Library (CDL)
Date: 17-08-2019
Publisher: Wiley
Date: 20-03-2013
DOI: 10.1111/BRE.12004
Publisher: Springer Science and Business Media LLC
Date: 16-05-2020
Publisher: American Geophysical Union (AGU)
Date: 05-2019
DOI: 10.1029/2019JB017508
Publisher: American Geophysical Union (AGU)
Date: 10-2023
DOI: 10.1029/2023TC007823
Publisher: Informa UK Limited
Date: 07-2009
Publisher: Wiley
Date: 23-11-2022
DOI: 10.1002/ESP.5490
Abstract: Analysis of TanDEM‐X and Shuttle Radar Topography Mission (SRTM) data reveals geomorphic evidence for 292 fault‐propagation fold scarps across the Miocene Nullarbor and Pliocene Roe Plains in south‐central Australia. Vertical displacements (VD) are determined using topographic profiling of a subset ( n = 48) of the fold traces. Fault dips (mean = 44 +16/−14° at 1σ) are estimated from seismic reflection data the mean dip is assigned to faults with unknown dip and combined with VD to estimate net displacements (ND) and average net displacements (AD) for each fault. AD exceeds single‐event displacements estimated from fault‐length scaling regressions, indicating the identified faults have hosted multiple earthquakes. Combining AD with (i) faulted surface ages (Nullarbor ~10–5 Ma, Roe ~2.5 Ma), (ii) ages of faulted erosional–depositional features (e.g. relic Late Miocene dune fields and Pliocene paleochannels), and (iii) onset of the neotectonic regime in Australia at ~10 Ma yields average slip rates from .1 m Myr −1 to m Myr −1 (mean = 1.1 m Myr −1 ). Summation of displacements across faults yields crustal horizontal shortening rates lower than geodetically detectable resolution (≤0.01 mm yr −1 ) since the Late Miocene. The ca. 10 Myr‐long record of neotectonic faulting on the Nullarbor Plain provides important insights into earthquake spatial–temporal behaviours in a slowly deforming intraplate continental region.
Publisher: California Digital Library (CDL)
Date: 08-11-2018
Publisher: California Digital Library (CDL)
Date: 09-08-2019
Publisher: MDPI AG
Date: 26-10-2022
DOI: 10.3390/GEOSCIENCES12110395
Abstract: Using ground penetrating radar (GPR) we investigate the near surface (~0–10 m depth) geophysical structure of neotectonic fault-propagation folds and thrust faults in south-central Australia in varying stages of fold and fault growth. Variations in neotectonic fold scarp heights are interpreted to reflect variations in accumulated slip on the underlying reverse faults. Fold scarps on the Nullarbor and Roe Plains are characterized by broad, asymmetric morphologies with vertical displacements of ~5 to ~40 m distributed over 1 to 2 km widths (~0.5 to ~4 m per 100 m). Within increasing scarp height there is an increase in the frequency and spatial density of strong reflector packages in the hanging wall that are attributed to material contrasts imposed by co-seismic fracturing and associated lithological and weathering variations. No evidence for discrete faulting is found at scarp heights up to 40 m (maximum relief of 4 m per 100 m). Where the principal slip zone of a fault ruptures to the surface, scarp morphologies are characterized by steep gradients (ca. 10 m per 100 m). Discrete faulting is imaged in GPR as structural lineaments, abrupt changes in the thickness of reflector packages with variations of litude, and/or hyperbolic diffraction packages indicative of the disturbance of reflector packages. Geophysical imaging of subtle changes in the shallow geological structure during growth of fault-propagation folds can be conducted using GPR informing the identification of locations for invasive investigations (e.g., trenching).
Publisher: Elsevier BV
Date: 2008
Publisher: California Digital Library (CDL)
Date: 17-08-2019
Publisher: Elsevier BV
Date: 05-2012
Publisher: Elsevier BV
Date: 06-2011
No related organisations have been discovered for MARK QUIGLEY.
Start Date: 03-2017
End Date: 12-2020
Amount: $345,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 09-2022
End Date: 08-2025
Amount: $436,000.00
Funder: Australian Research Council
View Funded Activity