A5054626208- Geological and Geophysical Studies
- Geomagnetism and Paleomagnetism Studies
- Geological and Geochemical Analysis
- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Geological Studies and Exploration
- Geological formations and processes
- Hydrocarbon exploration and reservoir analysis
- earthquake and tectonic studies
- Paleontology and Evolutionary Biology
- Geochemistry and Geologic Mapping
The University of Western Australia
2014-2020
Abstract We studied three partially overlapping sections with a composite thickness of ∼600 m in the upper Permian fluvial siltstones and fine‐grained sandstones Abrahamskraal Formation, basal unit Beaufort Group, Karoo Basin Western Cape Province, South Africa. Paleomagnetic analysis reveals components Natural Remanent Magnetization (NRM). Heating to ∼180°C removes remanent magnetization parallel present‐day field, which is interpreted as viscous overprint. An intermediate unblocking...
Abstract We report three high‐quality paleomagnetic poles for Oligocene Australia from volcanic provinces along the Cosgrove hot spot track in central Queensland, NE Australia. present Springsure (27.3–28.9 Ma: ϕ =300.6°E, λ =70.5°N, K =13.7, A 95 =9.7°, N =18/22, Q =6), Peak Range (28.2–31.2 =291.8°E, =64.6°N, =10.1, =8.8°, =29/31, and Hillsborough (33.1–34.1 =301.4°E, =67.1°N, =32.2, =7.1, =14/18, =7), as well data Buckland Nebo provinces. Using our new results, we resolve ambiguities...
Eastern Australian hotspots produce the longest continental tracks on Earth (>2000 km). These are generally assumed to be stationary with respect one another, an observation reinforced by our analysis. If any motion between them occurred, it is within 95% uncertainties of 370km accumulated hotspots. In contrast, eastern and spin axis indicated changing paleolatitudes through time. Reconstructing hotspot makes use global reference frame established geocentric axial dipole hypothesis. The...
The purpose of this study is to provide a new high-quality palaeomagnetic pole for mid-Miocene Australia using results from leucitite lavas in Eastern Australia, given their precise 40Ar/39Ar ages. We review published data during the and examine palaeosecular variation 15–17 Ma interval. average direction (D = 190.2°, I 57.1°, k 33.9, a95 6.7°) (λ −80.2°, ϕ 95.4°, K 20.5, A95 8.6°, N 15, Q 5) are statistically indistinguishable early poles Nandewar Volcano Port Campbell Glenample Formations,...