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Evolution of the Southern Kerguelen Plateau deduced from seismic stratigraphic studies and Drilling at Sites 748 and 750.pdf (2.06 MB)

Evolution of the Southern Kerguelen Plateau deduced from seismic stratigraphic studies and Drilling at Sites 748 and 750

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posted on 2023-05-17, 08:41 authored by Fritsch, B, Schlich, R, Munschy, M, Fezga, F, Mike CoffinMike Coffin
The evolution of the Raggatt Basin in the Southern Kerguelen Plateau, since the Late Cretaceous, was deduced from seismic stratigraphic interpretations of the multichannel seismic data and Ocean Drilling Program results at Sites 748 and 750. Synthetic seismograms were built using in situ and corrected core velocity values. Corrections were based on Wyllie's law, and exponential variations of porosity were calculated from logging data at Site 750. The synthetic seismograms in conjunction with the seismic sections allowed us to correlate the lithologic units and the seismic sequences. After the emplacement of oceanic basaltic basement at 110 Ma, the Late Cretaceous history of the Raggatt Basin was controlled by two rifting episodes at 88 Ma to the east and at 66 Ma to the west. The first rifting episode, with an axis of extension striking northwest-southeast, formed the eastern flank of the Southern Kerguelen Plateau. The second rifting episode, along a north-south axis, formed the 77°E Graben. At 45-42 Ma, the separation by seafloor spreading of the Kerguelen Plateau-Labuan Basin and Broken Ridge-Diamantina Zone marks a third rifting episode, which was recorded on the Southern Kerguelen Plateau by erosion.


Publication title

Proceedings of the Ocean Drilling Program, Scientific Results








Institute for Marine and Antarctic Studies


Texas A & M University, Ocean Drilling Program

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United States

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How To Obtain Copyright Permission (updated 5 September 2007) The Proceedings of the Ocean Drilling Program are designed to consolidate, preserve, and disperse knowledge of the Earth gained through scientific research of the oceans. As a result, our publications are distributed as widely and freely as possible for use by the scientific community and the public. Permission is not required for the use of our publications, but we do wish to be acknowledged.

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