A5066679834- Geological and Geophysical Studies
- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- earthquake and tectonic studies
- Seismic Imaging and Inversion Techniques
- Geological Modeling and Analysis
- Paleontology and Stratigraphy of Fossils
- Geophysical and Geoelectrical Methods
- Hydrocarbon exploration and reservoir analysis
- Pacific and Southeast Asian Studies
- Geological formations and processes
- Geological Formations and Processes Exploration
- Invertebrate Taxonomy and Ecology
- Seismic Waves and Analysis
- Hydraulic Fracturing and Reservoir Analysis
Geological Survey of Western Australia
2011-2018
United States Geological Survey
2012
Commonwealth Scientific and Industrial Research Organisation
2011
Abstract The Australian continent records c. 1860–1800 Ma orogenesis associated with rapid accretion of several ribbon micro-continents along the southern and eastern margins proto-North Craton during Nuna assembly. boundaries these accreted are imaged in crustal-scale seismic reflection data, regional gravity aeromagnetic datasets. Continental growth ( 1860–1850 Ma) margin is recorded by a micro-continent that included Aileron Terrane (northern Arunta Inlier) Gawler Craton. Eastward North...
Deep seismic reflection imaging combined with geochronological, palaeomagnetic and stratigraphic data indicate that the world class sediment-hosted Pb–Zn deposits of northern Australia are preferentially concentrated in post-extensional syn-inversion fraction Calvert Isa superbasins. These fractions were deposited at 1650–1640 Ma 1615–1575 respectively, overlap age known orogenic events both western Laurentia, pointing to a common origin linked crustal shortening supercontinent assembly....
timescales, supporting suggestions that the late Paleoproterozoic-early Mesoproterozoic rift basins of Mount Isa and Broken Hill similarly evolved to continental breakup formed part a margin sequence no later than 1640 Ma possibly as early 1670 Ma.This rifted predates assembly Neoproterozoic Rodinia supercontinent which Australia once belonged best accords with pre-Rodinia, SWEAT-like (Nuna) matches E-facing sequences eastern against rocks comparable age in western Canada.Reconstructions...
The Mt Isa–McArthur region is renowned for a range of commodities and deposit types world-class proportions. described here in the context 'mineral system,' through consideration processes that operate across scales, from geodynamics crustal architecture, to fluid sources, pathways, drivers depositional processes. objective improve targeting Pb–Zn, Cu Cu–Au deposits. Repeated extension high heat flow characterise much history prior 1640 Ma. pre-Barramundi Orogeny (pre-1.87 Ga) metamorphic...
Inlier, comprising a central Kalkadoon-Leichhardt basement block flanked by eastern and western fold belts (Figure 1).More comments on the geodynamic setting of Mount Isa Inlier are given in Gibson et al. (2012).Thick pre-mineralisation clastic successions became important metal reservoirs fluid aquifers (Polito al., 2006) during formation world-class Pb-Zn deposits Superbasin.Extensional environments also provided complex network syndepositional faults that were later reactivated to provide...
Deep seismic reflection surveys in north Queensland that were collected 2006 and 2007 discovered a previously unknown sedimentary basin, now named the Millungera Basin, which is completely covered by thin succession of sediments Jurassic–Cretaceous, Eromanga-Carpentaria Basin. Interpretation regional aeromagnetic data suggests basin could have areal dimensions up to 280 km 95 km. Apart from geophysical data, virtually no confirmed geological information exists on basin. To complement new...
We use seismic tomography, exploiting group velocities derived from ambient noise, to delineate the crustal structure beneath Mt Isa and surrounding blocks basins. The depth extent of can be traced into mid-crust spatial associated velocity anomalies mapped over an area approximately 500 km by km. Proterozoic block is imaged as a region elevated comparable Yilgarn craton in Western Australia, while basins have relatively low velocities. Seismic display correlations with regional Bouguer...
An unknown sedimentary sequence was first recorded during a Geoscience Australia/ Geological Survey of Queensland/ pmd*CRC deep seismic reflection survey in the Mount Isa Inlier and adjacent undercover terrains, 2006/07. The occurs unconformably underneath Carpentaria Basin succession Julia Creek area, east Cloncurry north Queensland, is named Millungera Basin. A section through basin along line 07GA–IG1, between to Croydon. In this three internal sequences are noted—with two strongly...
Presented at the IAGR Conference in Adelaide 2012.Outlines Ordovician to Silurian evolution of North Queensland and concludes that tectonic setting is related development continental ribbons formed during subduction roll-back subsequently re-amalgamated eastern margin Gondwana.Compares with Proterozoic Australia.