ORCID Profile
0000-0003-2380-3896
Current Organisations
The University of Western Australia Faculty of Science
,
University of Western Australia
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Publisher: American Geophysical Union (AGU)
Date: 10-2015
DOI: 10.1002/2015GC005930
Publisher: Elsevier BV
Date: 11-2017
Publisher: Elsevier BV
Date: 04-2016
Publisher: Oxford University Press (OUP)
Date: 11-07-2018
DOI: 10.1093/GJI/GGY281
Publisher: SEPM (Society for Sedimentary Geology)
Date: 08-09-2017
Publisher: Elsevier BV
Date: 2015
Publisher: American Geophysical Union (AGU)
Date: 07-2019
DOI: 10.1029/2019JB017639
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. We present paleomagnetic poles for 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 Ma: ϕ =291.8°E, λ =64.6°N, K =10.1, A 95 =8.8°, N =29/31, Q =6), and Hillsborough volcanic provinces (33.1–34.1 Ma: ϕ =301.4°E, λ =67.1°N, K =32.2, A 95 =7.1, N =14/18, Q =7), as well as data from Buckland and Nebo volcanic provinces. Using our new results, we resolve ambiguities present in published paleomagnetic data for Australia during the Oligocene epoch (23–34 Ma) and calculate a combined Oligocene paleomagnetic pole of ϕ =289.2°E, λ =71.0°N, ( K =24.6, A 95 =1.9°, N =227/274, Q =6). We update the continental apparent polar wander path for Australia and find evidence for accelerated seafloor spreading in the Southern Ocean after ∼34 Ma (anomaly C13). Lastly, we take advantage of the large number of paleomagnetic sites ( N =97) along the Cosgrove hot spot track to empirically evaluate the TK03.GAD geomagnetic field model. Paleomagnetic directions from rocks along the Cosgrove track have an elongation ( E ) of 1.6, remarkably consistent with TK03.GAD expected values for hot spot paleolatitudes ( E =1.4–1.6, λ =36.6–43.3°S).
Location: Australia
No related grants have been discovered for Jeroen Hansma.