Mesozoic/Cenozoic tectonic events around Australia

Müller, R. Dietmar; Gaina, Carmen; Tikku, A. A.; Mihut, Dona; Cande, S. C.; Stock, J. M.

doi:10.1029/gm121p0161

Cited by 66 publications

(47 citation statements)

References 65 publications

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“…Heinemann et al (1999) and Stock (1997) suggest that the MBS province formed in the vicinity of the Antarctic-Pacific-Bellingshausen triple junction. Between C27 and C25/ C24 (57-54 Ma), a substantial drop in spreading rate occurred at the Pacific-Antarctic Ridge, and together with a gradual rotation of the spreading direction (Müller et al, 2000), an increase in fracture zone density is notable (Eagles et al, 2004a). At the same time, the West Antarctic Rift System (WARS) continued its crustal extension in Marie Byrd Land and possibly into the Amundsen Sea Embayment just south of the MBS (Gohl et al, 2013).…”

Section: Tectonic and Magmatic Evolution Of The Sw-pacific Over The Pmentioning

confidence: 99%

Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism

et al. 2014

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Section: Tectonic and Magmatic Evolution Of The Sw-pacific Over The Pmentioning

confidence: 99%

Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism

et al. 2014

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“…The first break-up occurred with separation of Greater India from Australia and East Antarctica during the Early Cretaceous (Curray et al 1982;Royer and Coffin 1992;Gopala Rao et al 1997;Müller et al 2000). In the second stage, the Elan Bank, a micro-continent, which presently lies on the western margin of the Kerguelen Plateau in the southern Indian Ocean, got detached from the eastern margin of India at about 120 Ma (Gaina et al 2003).…”

Section: Discussionmentioning

confidence: 96%

Magnetic anomalies of offshore Krishna-Godavari basin, eastern continental margin of India

et al. 2009

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The marine magnetic data acquired from offshore Krishna-Godavari (K-G) basin, eastern continental margin of India (ECMI), brought out a prominent NE-SW trending feature, which could be explained by a buried structural high formed by volcanic activity. The magnetic anomaly feature is also associated with a distinct negative gravity anomaly similar to the one associated with 85 • E Ridge. The gravity low could be attributed to a flexure at the Moho boundary, which could in turn be filled with the volcanic material. Inversion of the magnetic and gravity anomalies was also carried out to establish the similarity of anomalies of the two geological features (structural high on the margin and the 85 • E Ridge) and their interpretations. In both cases, the magnetic anomalies were caused dominantly by the magnetization contrast between the volcanic material and the surrounding oceanic crust, whereas the low gravity anomalies are by the flexures of the order of 3-4 km at Moho boundary beneath them. The analysis suggests that both structural high present in offshore Krishna-Godavari basin and the 85 • E Ridge have been emplaced on relatively older oceanic crust by a common volcanic process, but at discrete times, and that several of the gravity lows in the Bay of Bengal can be attributed to flexures on the Moho, each created due to the load of volcanic material.

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“…Tasman Sea spreading (Australia-WNZ) is quantified by magnetic anomalies (Gaina et al, 1998), as is ENZ-MBL spreading . It is not clear that magnetic lineations in the southeast Indian Ocean are isochrons, but detailed analyses and published reconstructions exist Cande, 1999, 2000;Muller et al, 2000). It is notable that substantial overlaps between Tasmania and Wilkes Land region have been predicted by some regional analyses and are inconsistent with local restoration of seafloor (Royer and Rollet, 1997;Tikku and Cande, 2000); this suggests some internal deformation (extension) of either the Australian or Antarctic plates, or the regional data are open to alternate interpretation (Whittaker et al, 2007).…”

Section: -56 Mamentioning

confidence: 92%

The significance of Antarctica for studies of global geodynamics

Sutherland¹

2007

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Mesozoic/Cenozoic tectonic events around Australia

Cited by 66 publications

References 65 publications

Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism

Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism

Magnetic anomalies of offshore Krishna-Godavari basin, eastern continental margin of India

The significance of Antarctica for studies of global geodynamics

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