Citation: F. J. Hernández-Molina, F. Bohoyo, A.
Summary The Scan Basin is a small oceanic basin located in the southern central Scotia Sea, north of the Bruce Passage (BP) which represents the main gateway between the Weddell Sea and the Scotia Sea. A seismic stratigraphic analysis has been carried out on multichannel seismic reflection profiles...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.559.4523 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea086.pdf |
| Summary: | Summary The Scan Basin is a small oceanic basin located in the southern central Scotia Sea, north of the Bruce Passage (BP) which represents the main gateway between the Weddell Sea and the Scotia Sea. A seismic stratigraphic analysis has been carried out on multichannel seismic reflection profiles to determine the Miocene to present evolution of the basin. Five seismic units are identified. The oldest unit (Sc5) was deposited during seafloor spreading in the Scan Basin. The upper four units represent the post-spreading deposits and show three major evolutionary stages: A) pre-BP opening (unit Sc-4); B) BP opening (units Sc3 and Sc2) and C) post-BP opening (unit Sc1). Stage B occurred once the BP was deep enough to allow Weddell Sea Deep Water (WSDW) into the Scotia Sea. This led to the development of large, northwards-migrating contourite drifts. Stage C developed during the present-day sinistral transcurrent compressive regime. |
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