Seismic stratigraphy of the Raggatt Basin, southern Kerguelen Plateau: tectonic and paleoceanographic implications
During Cenozoic and late Mesozoic time, sediment accumulated in the Raggatt Basin on the southern Kerguelen Plateau. We describe the seismic stratigraphy of the Raggatt Basin, utilizing multichannel seismic (MCS) data obtained by the Bureau of Mineral Resources, Geology and Geophysics (Australia) an...
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Assoc Engineering Geologists Geological Society Amer
1990
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ftunivtasecite:oai:ecite.utas.edu.au:73892 2023-05-15T14:02:30+02:00 Seismic stratigraphy of the Raggatt Basin, southern Kerguelen Plateau: tectonic and paleoceanographic implications Coffin, MF Munschy, M Colwell, JB Schlich, R Davies, HL Li, ZG 1990 application/pdf https://doi.org/10.1130/0016-7606(1990)102<0563:SSOTRB>2.3.CO;2 http://ecite.utas.edu.au/73892 en eng Assoc Engineering Geologists Geological Society Amer http://ecite.utas.edu.au/73892/1/Coffin_et_al_GSABull_1990.pdf http://dx.doi.org/10.1130/0016-7606(1990)102<0563:SSOTRB>2.3.CO;2 Coffin, MF and Munschy, M and Colwell, JB and Schlich, R and Davies, HL and Li, ZG, Seismic stratigraphy of the Raggatt Basin, southern Kerguelen Plateau: tectonic and paleoceanographic implications, Geological Society of America. Bulletin, 102, (5) pp. 563-579. ISSN 0016-7606 (1990) [Refereed Article] http://ecite.utas.edu.au/73892 Earth Sciences Geology Marine Geoscience Refereed Article PeerReviewed 1990 ftunivtasecite https://doi.org/10.1130/0016-7606(1990)102<0563:SSOTRB>2.3.CO;2 2019-12-13T21:40:58Z During Cenozoic and late Mesozoic time, sediment accumulated in the Raggatt Basin on the southern Kerguelen Plateau. We describe the seismic stratigraphy of the Raggatt Basin, utilizing multichannel seismic (MCS) data obtained by the Bureau of Mineral Resources, Geology and Geophysics (Australia) and the Institut de Physique du Globe de Strasbourg (France). Seven major seismic stratigraphic sequences in the Raggatt Basin overlie a basement complex of Early Cretaceous age. The underlying basement complex is characterized by two types of seismic images: acoustic basement and a layered basement which includes dipping reflectors. The seismic stratigraphic sequences include terrestrial and shallow-water units K1 and K2 of Early to Late Cretaceous age, which fill depressions in the basement; a thick unit, K3, of Late Cretaceous to Paleocene age, which is of mixed shallow-water and open-marine facies and in places has a mounded (carbonate) upper surface; a depression-filling pelagic deposit, P1, of Late Cretaceous to Eocene age; a thick pelagic unit, P2, which is mainly Eocene in age; and two post-Eocene pelagic sequences, PN1 and NQ1, which are relatively thin and more limited in areal extent than the underlying sequences. Highlights in the geologic history of the Raggatt Basin include formation and erosion of the basement complex in a subaerial or shallow-water environment in Early Cretaceous time; differential subsidence, probably thermal in origin, and development of carbonate mounds and a major western boundary transform fault in Late Cretaceous time; renewed subsidence near the Cretaceous-Tertiary boundary possibly related to formation of the Labuan Basin/Diamantina Zone by sea-floor spreading; and vigorous Antarctic Circumpolar Current activity beginning by Oligocene time, probably related to the breakup of the northern Kerguelen Plateau and Broken Ridge. Article in Journal/Newspaper Antarc* Antarctic eCite UTAS (University of Tasmania) Antarctic Broken Ridge ENVELOPE(-92.318,-92.318,79.552,79.552) Kerguelen |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Geology Marine Geoscience |
spellingShingle |
Earth Sciences Geology Marine Geoscience Coffin, MF Munschy, M Colwell, JB Schlich, R Davies, HL Li, ZG Seismic stratigraphy of the Raggatt Basin, southern Kerguelen Plateau: tectonic and paleoceanographic implications |
topic_facet |
Earth Sciences Geology Marine Geoscience |
description |
During Cenozoic and late Mesozoic time, sediment accumulated in the Raggatt Basin on the southern Kerguelen Plateau. We describe the seismic stratigraphy of the Raggatt Basin, utilizing multichannel seismic (MCS) data obtained by the Bureau of Mineral Resources, Geology and Geophysics (Australia) and the Institut de Physique du Globe de Strasbourg (France). Seven major seismic stratigraphic sequences in the Raggatt Basin overlie a basement complex of Early Cretaceous age. The underlying basement complex is characterized by two types of seismic images: acoustic basement and a layered basement which includes dipping reflectors. The seismic stratigraphic sequences include terrestrial and shallow-water units K1 and K2 of Early to Late Cretaceous age, which fill depressions in the basement; a thick unit, K3, of Late Cretaceous to Paleocene age, which is of mixed shallow-water and open-marine facies and in places has a mounded (carbonate) upper surface; a depression-filling pelagic deposit, P1, of Late Cretaceous to Eocene age; a thick pelagic unit, P2, which is mainly Eocene in age; and two post-Eocene pelagic sequences, PN1 and NQ1, which are relatively thin and more limited in areal extent than the underlying sequences. Highlights in the geologic history of the Raggatt Basin include formation and erosion of the basement complex in a subaerial or shallow-water environment in Early Cretaceous time; differential subsidence, probably thermal in origin, and development of carbonate mounds and a major western boundary transform fault in Late Cretaceous time; renewed subsidence near the Cretaceous-Tertiary boundary possibly related to formation of the Labuan Basin/Diamantina Zone by sea-floor spreading; and vigorous Antarctic Circumpolar Current activity beginning by Oligocene time, probably related to the breakup of the northern Kerguelen Plateau and Broken Ridge. |
format |
Article in Journal/Newspaper |
author |
Coffin, MF Munschy, M Colwell, JB Schlich, R Davies, HL Li, ZG |
author_facet |
Coffin, MF Munschy, M Colwell, JB Schlich, R Davies, HL Li, ZG |
author_sort |
Coffin, MF |
title |
Seismic stratigraphy of the Raggatt Basin, southern Kerguelen Plateau: tectonic and paleoceanographic implications |
title_short |
Seismic stratigraphy of the Raggatt Basin, southern Kerguelen Plateau: tectonic and paleoceanographic implications |
title_full |
Seismic stratigraphy of the Raggatt Basin, southern Kerguelen Plateau: tectonic and paleoceanographic implications |
title_fullStr |
Seismic stratigraphy of the Raggatt Basin, southern Kerguelen Plateau: tectonic and paleoceanographic implications |
title_full_unstemmed |
Seismic stratigraphy of the Raggatt Basin, southern Kerguelen Plateau: tectonic and paleoceanographic implications |
title_sort |
seismic stratigraphy of the raggatt basin, southern kerguelen plateau: tectonic and paleoceanographic implications |
publisher |
Assoc Engineering Geologists Geological Society Amer |
publishDate |
1990 |
url |
https://doi.org/10.1130/0016-7606(1990)102<0563:SSOTRB>2.3.CO;2 http://ecite.utas.edu.au/73892 |
long_lat |
ENVELOPE(-92.318,-92.318,79.552,79.552) |
geographic |
Antarctic Broken Ridge Kerguelen |
geographic_facet |
Antarctic Broken Ridge Kerguelen |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://ecite.utas.edu.au/73892/1/Coffin_et_al_GSABull_1990.pdf http://dx.doi.org/10.1130/0016-7606(1990)102<0563:SSOTRB>2.3.CO;2 Coffin, MF and Munschy, M and Colwell, JB and Schlich, R and Davies, HL and Li, ZG, Seismic stratigraphy of the Raggatt Basin, southern Kerguelen Plateau: tectonic and paleoceanographic implications, Geological Society of America. Bulletin, 102, (5) pp. 563-579. ISSN 0016-7606 (1990) [Refereed Article] http://ecite.utas.edu.au/73892 |
op_doi |
https://doi.org/10.1130/0016-7606(1990)102<0563:SSOTRB>2.3.CO;2 |
_version_ |
1766272778789453824 |