Jurassic to Eocene Plate Tectonic Reconstructions in the Kerguelen Plateau Region

Royer, Jean‐Yves; Coffin, Millard F.

doi:10.2973/odp.proc.sr.120.200.1992

Cited by 72 publications

(85 citation statements)

References 47 publications

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“…Middle Eocene magnetic anomalies present in the oceanic crust south of the eastwest orientated 250 km wide Diamantina Zone (Tikku and Cande, 1999) (Figs. 1 and 3) correspond to the separation of the Diamantina Zone and the Labuan Basin and the onset of fast spreading between Australia and Antarctica (Cande and Mutter, 1982;Royer and Coffin, 1992). The rapid northward motion of Greater India began ∼70 Ma and once Greater India slowed in its northward migration (∼50 Ma) the onset of fast spreading between Australia and Antarctica initiated (Cande and Mutter, 1982).…”

Section: Structural Reappraisal Of the Mentelle Basinmentioning

confidence: 99%

“…This ultimately resulted in the gradual propagation of the Southeast Indian Ridge System (e.g. Royer and Coffin, 1992;Gaina et al, 2007) to the southeast, forming a new magma poor margin and a continent ocean transition zone in the Diamantina Zone, south of the Mentelle Basin Beslier et al, 2004) (Figs. 1 and 3), younging to the east (Tikku and Direen, 2008).…”

Section: Geological Settingmentioning

confidence: 99%

“…At around 95 Ma (Cenomanian) Coffin et al, 2002) there was mafic volcanism and the onset of rifting of the Broken Ridge microcontinent from the Kerguelen Plateau, west of the Naturaliste Plateau (Royer and Coffin, 1992;Cande, 1999, 2000). Final breakup between these features appears to have taken place at C34 time (Coniacian-Santonian: ∼85 Ma) (Tikku and Cande, 2000;Tikku and Direen, 2008).…”

Section: Geological Settingmentioning

confidence: 99%

“…1 and 2) is the northern arm of a triple junction that formed during the final stages of Gondwana breakup (e.g. Powell et al, 1988;Royer and Coffin, 1992;Direen et al, , 2008. The tectonic history of the Mentelle Basin within this milieu is poorly defined (Borissova, 2002;Bradshaw et al, 2003;Borissova et al, 2010a, b), with basin history largely extrapolated from better-studied areas to the north (e.g.…”

Section: Geological Settingmentioning

confidence: 99%

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Re-evaluation of the Mentelle Basin, a polyphase rifted margin basin, offshore southwest Australia: new insights from integrated regional seismic datasets

et al. 2011

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Abstract.Vintage 2-D (two-dimensional) seismic reflection surveys from the sparsely explored Mentelle Basin (western Australian margin) have been reprocessed and integrated with a recent high-quality 2-D seismic survey and stratigraphic borehole data. Interpretation of these data sets allows the internal geometry of the Mentelle Basin fill and depositional history to be reanalysed and new insights into its formation revealed. Basin stratigraphy can be subdivided into several seismically defined megasequences separated by major unconformities related to both breakup between IndiaMadagascar and Australia-Antarctica in the ValanginianLate Hauterivian and tectonically-driven switches in deposition through the Albian.Resting on the Valanginian-Late Hauterivian breakup unconformity are several kilometre-scale mounded structures that formed during Late Jurassic to Early Cretaceous extension. These have previously been interpreted as volcanic edifices although direct evidence of volcanic feeder systems is lacking. An alternative interpretation is that these features may be carbonate build-ups. The latter interpretation carries significant climatic ramifications since carbonate build-ups would have formed at high palaeolatitude, ∼60 • S.Soon after breakup, initial subsidence resulted in a shallow marine environment and deposition of Barremian-Aptian silty-sandy mudstones. As subsidence continued, thick successions of Albian ferruginous black clays were deposited. Internally, seismic megasequences composed of successions of black clays show previously unresolved unconformities, onlapping and downlapping packages, which reflect a com-

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Section: Structural Reappraisal Of the Mentelle Basinmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

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Re-evaluation of the Mentelle Basin, a polyphase rifted margin basin, offshore southwest Australia: new insights from integrated regional seismic datasets

et al. 2011

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“…The break-up was preceded by rifting phases that formed NW-SE-, N-S-and E-W-trending structures in the plateau basalts. The NW-SEstriking structures are normal to the extension direction and correspond to ridges and normal faults, which sometimes delimit tilted blocks, formed between 88 Ma and 43 Ma (Coffin et al, 1986;Fritsch et al, 1992;Rotstein et al, 1992;Rotstein et al, 1991;Royer and Coffin, 1992;Könnecke and Coffin, 1994;Angoulvant-Coulon and Schlich, 1994;Munschy et al, 1993). Two N-S striking grabens named the 77°E and 75°E grabens are pull-apart related to sinistral strike-slip movements along the NW-SE structures (Munschy at al., 1993).…”

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confidence: 99%

The field and remote sensing analysis of the Kerguelen Archipelago structure, Indian Ocean

Mathieu

Byrne

Guillaume

et al. 2011

Journal of Volcanology and Geothermal Research

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1The Kerguelen Archipelago is part of an oceanic plateau with a complex history. Little work has been done on the tectonics of the onshore areas, even though the extensive outcrop renders the islands especially good for structural work. We present the results of three field campaigns and remote sensing analysis carried out in the main Kerguelen Island, around Val Travers valley and Mt Ross volcano (Central Plateau) and in the Rallier du Baty peninsula (SW part of the archipelago). We have mapped faults, fracture sets, and the location and geometry of intrusive bodies. We found that the plateau basalt lavas that make up most of the area are densely fractured, crossed by many veins, dykes and some small faults. This work provides a general framework for the structure of Kerguelen Archipelago that is dominated by 110°-striking faults and veins, dyke swarms and an alignment of recent central volcanoes, which have formed in N-S to NNW-SSE directed extensional stress field. The other structures are fractures, veins and dykes which strike 130°-150°, 000° and 030°-050°. They are likely related to transform faults of the Indian oceanic crust and to faults of the north Kerguelen Plateau (offshore basement of the archipelago). These buried structures were likely re-activated by a low magnitude stress field.

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Seismic evidence of continental margin influence on the NinetyEast Ridge in the Bay of Bengal

Moeremans

Singh

2014

Geophysical Research Letters

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The NinetyEast Ridge (NER), one of the most enigmatic features in the Indian Ocean, is covered by thick Bengal Fan sediment north of 9°N. We present seismic reflection data on the eastern flank of the NER, at 10°N, that show the presence of 4-5 km thick sediments beneath the Bengal Fan sediments. These sediments can be imaged up to 60 km beneath the Andaman fore-arc accretionary wedge, suggesting that the décollement lies above these sediments. The presence of thick sediments above the northernmost segment of the NER suggests that this segment was close to a continental margin during its emplacement. We propose that these sediments were deposited soon after the breakup of India and Antarctica, between 130 and 100 Ma, and might act as source rocks for oil and gas generation beneath recent Bengal Fan sediments. Furthermore, subducting thick sediments can significantly change the seismogenic behavior of the Andaman subduction zone.

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Jurassic to Eocene Plate Tectonic Reconstructions in the Kerguelen Plateau Region

Abstract: We present a series of preliminary reconstructions for the Kerguelen Plateau region from the Late Jurassic to the Eocene that summarize and review the outstanding questions about its plate tectonic evolution.

Cited by 72 publications

References 47 publications

Re-evaluation of the Mentelle Basin, a polyphase rifted margin basin, offshore southwest Australia: new insights from integrated regional seismic datasets

Re-evaluation of the Mentelle Basin, a polyphase rifted margin basin, offshore southwest Australia: new insights from integrated regional seismic datasets

The field and remote sensing analysis of the Kerguelen Archipelago structure, Indian Ocean

Seismic evidence of continental margin influence on the NinetyEast Ridge in the Bay of Bengal

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