A5034565099- Geomagnetism and Paleomagnetism Studies
- Methane Hydrates and Related Phenomena
- Geological and Geophysical Studies
- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- Drilling and Well Engineering
- Reservoir Engineering and Simulation Methods
- Offshore Engineering and Technologies
- Geophysics and Gravity Measurements
- Spacecraft and Cryogenic Technologies
- Geophysical and Geoelectrical Methods
- Astronomical Observations and Instrumentation
- earthquake and tectonic studies
- Astro and Planetary Science
- Hydraulic Fracturing and Reservoir Analysis
- Geochemistry and Geologic Mapping
- Geological Modeling and Analysis
- Scientific Research and Discoveries
- Paleontology and Stratigraphy of Fossils
- Geological formations and processes
- Astronomy and Astrophysical Research
- Seismic Imaging and Inversion Techniques
- Inertial Sensor and Navigation
- Seismic Waves and Analysis
- Solar and Space Plasma Dynamics
Geological Survey of Western Australia
2010-2021
University of Newcastle Australia
2007-2020
The University of Sydney
2016-2019
NSW Department of Planning and Environment
2018-2019
United States Geological Survey
2007-2018
University of Tasmania
1991-2015
International Ocean Discovery Program
2015
La Trobe University
1996-2007
New South Wales Department of Primary Industries
2007
Monash University
2005-2006
The timing of flood basalt volcanism associated with formation the Ontong Java Plateau (OJP) is estimated from paleomagnetic and paleontologic data. Much OJP formed rapidly in less than 3 million years during early Aptian, at beginning Cretaceous Normal Polarity Superchron. Crustal emplacement rates are inferred to have been several times those Deccan Traps. These estimates consistent an origin by impingement base oceanic lithosphere head a large mantle plume. Formation may led rise sea...
High‐resolution three‐dimensional (3‐D) seismic reflection data acquired on the R/V Thomas G. Thompson in 2000 reveal a pair of bottom simulating reflections (BSRs) across broad region southern Hydrate Ridge, offshore Oregon. The primary BSR (BSR p ) is regionally extensive that lies 120–150 m below seafloor and exhibits typical characteristics gas hydrate BSR. We also imaged second weaker s ), 20–40 , with similar characteristics. interpreted as remnant probably formed during Last Glacial...
Simple models involving the gradual outboard accretion of material along curvilinear subduction zones are often inconsistent with field-based evidence. A recent study using 3-D geodynamic modelling has shown that entrainment an exotic continental fragment within a simple system can result in complex phase growth. Although kinematic based on structural mapping and high-resolution gravity magnetic maps indicate pre-Carboniferous Tasmanides southeastern Australia may have been subjected to this...
We present a resistivity model of the southern Tasmanides southeastern Australia using Australian Lithospheric Architecture Magnetotelluric Project (AusLAMP) data. Modelled lower crustal conductivity anomalies resemble concentric geometries revealed in upper crust by potential field and passive seismic These are key part architecture predicted Lachlan Orocline for evolution Tasmanides, which Proterozoic Selwyn Block drives oroclinal rotation against eastern Gondwana margin during Silurian...
Abstract Surface scatters of stone artefacts are ubiquitous in the Australian landscape and form basis for majority archaeological conservation decisions. The research reported here proposes a distributional approach analysing this record founded on artefact as minimal recording unit rather than site. A method assemblage definition is proposed to permit study composition across space. applied exposed surface result recent erosion at TIB 13 (Sturt National Park, NSW). All greater 20mm maximum...
Research Article| February 01, 2006 Rise of the base gas hydrate zone since last glacial recorded by rock magnetism Robert J. Musgrave; Musgrave 1School Geosciences, Monash University, Clayton, VIC 3800, Australia Search for other works this author on: GSW Google Scholar Nathan L. Bangs; Bangs 2University Texas, Institute Geophysics, 4412 Spicewood Springs Road, Austin, Texas 78759, USA Juan Cruz Larrasoaña; Larrasoaña 3Laboratori de Paleomagnetisme, Consejo Superior Investigaciones...
Most tectonic models for the Solomon Islands Arc invoke a Miocene collision with Ontong Java Plateau (OJP) to halt cessation of Pacific Plate subduction, initiate Australian and emplace Malaita Terrane, which shares characteristic basement age geochemistry OJP. Existing paleomagnetic evidence, however, required Terrane have been fixed arc from at least Late Eocene. New sampling has yielded pole Aptian–Albian limestones mudstones that falls between apparent polar wander paths OJP, confirming...
IODP Expedition 350 was the first to be drilled in rear part of Izu-Bonin, although several sites had been arc axis fore-arc region; scientific objective understand evolution Izu arc, by drilling a deep-water volcaniclastic section with long temporal record (Site U1437). The is dominated series basaltic dacitic seamount chains up ~100-km roughly perpendicular front. Dredge samples from these are geochemically distinct front rocks, and undertaken this asymmetry. Site U1437 lies an ~20-km-wide...
Acquisition of teleseismic data in south-western New South Wales during 2007 formed the latest stage a rolling deployment seismometers over south-eastern Australia, and allowed revised tomographic model to be constructed for lithospheric mantle under Victoria southern NSW. Our aim here is link observed distribution upper-mantle P-wave velocity major geological features upper crust, which comprise terranes Delamerian Lachlan orogens. We have extended definition boundaries these cover by use...
Malaita, in the Solomon Islands, is emergent expression of Pacific Province, a geologically distinct suspect terrane which commonly held to be margin Ontong Java Plateau, thickened portion plate overthrust onto rest Islands Arc during late Miocene reversal polarity arc. Subduction Australian replaced subduction this event, and was transferred from plate. A paleomagnetic survey eastern included sampling southern Malaita. Magnetostratigraphic dating gives an age 5.8 Ma for Haruta...
Recent versions of the Australian apparent polar wander path (APWP) for late Mesozoic and Tertiary show considerable variation. Re-examination igneous data suggests that they are more reliable than assumed by some recent authors. The trajectory APWP is defined fitting position a set poles including both laterite/overprint data. This allows dated to be used determine age as function distance along trajectory. Both fitted means weighted least-squares regression, given approximate confidence limits.
Research Article| September 01, 2014 Complex continental growth along the proto-Pacific margin of East Gondwana Nicholas Rawlinson; Rawlinson 1School Geosciences, Meston Building, University Aberdeen, Aberdeen AB24 3UE, Scotland, UK Search for other works by this author on: GSW Google Scholar Pierre Arroucau; Arroucau 2Instituto Dom Luiz, Faculdade de Ciências da Universidade Lisboa, 1749-016 Lisbon, Portugal Robert Musgrave; Musgrave 3Geological Survey New South Wales, 516 High Street,...
Paleomagnetic results from Nendo record a total rotation of the northwestern corner New Hebrides Arc 52° ± 12° clockwise. Reversed magnetic polarity and nannofossil assemblage constrain age pole to 4.29 ‐ 3.58 Ma. data Malekula, farther south in same arc, imply only about 28° since late Miocene, probably because these poles have been affected by Malekula response collision arc with D'Entrecasteaux Zone aseismic ridge. A new Miocene reconstruction Vitiaz arcs based on paleomagnetic evidence...
Abstract Data from diamond drillholes and geophysically-logged wells have been combined with surface data to produce a stratigraphy for the Werribee Plains lava field, in easternmost part of Cenozoic Newer Volcanics Province, southeastern Australia. Outcrop is scarce hence nine (up 110 m deep) 40 provided fresh perspective geology this intraplate basaltic flow-field. Two three samples every flow unit identified drillcore were demagnetised (175 samples). The primary remanent magnetisation was...
Abstract Core disturbance, drilling overprints, postdepositional acquisition of remanence, authigenic growth magnetic iron sulfides, and alteration all contribute challenges to recognizing the primary magnetostratigraphy in marine sediments. We address these issues a sequence tuffaceous muds volcaniclastics at International Ocean Discovery Program Site U1437 produce longest continuous polarity stratigraphy history scientific ocean drilling. Remanence measurements were filtered remove...
Abstract International Ocean Discovery Program (IODP) Site U1437 recovered an 1,800‐m‐long sediment sequence in a volcano‐bounded basin on the Izu rear arc. Pore fluid studies revealed pattern of repeated inputs, diffusion, and methane ethane accumulations, which represent “fluid anomalies” that disturb profiles. First‐order reversal curve analysis, magnetic hysteresis, saturation isothermal remanent magnetization, low‐temperature remanence cycling reveal detrital input dominated by...