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Seismic Structures of the Eastern Bransfield Basin, Antarctic Peninsula

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Title
Seismic Structures of the Eastern Bransfield Basin, Antarctic Peninsula
Other Titles
남극반도 동부 브랜스필드분지의 탄성파구조
Authors
Jin, Young Keun
Nam, SangHeon
Lee, Ju-Han
Kim, Yeadong
Subject
Environmental Sciences & Ecology
Keywords
Eastern Bransfield Basin; Antarctic Peninsula; seismic structure; marginal basin; extension
Issue Date
2004
Citation
Jin, Young Keun, et al. 2004. "Seismic Structures of the Eastern Bransfield Basin, Antarctic Peninsula". Korean Geophysical Society: 97-108.
Abstract
The Basin, a marginal basin located between the Antarctic Peninsula and the South Shetland Islands, isconsist of three small basins, the Central, Eastern, Western Basins. Seismic data obtained on December1995 show well-defined spreading ridges, basement highs, faults, morphology of the basin, distribution ofsediments, crustal and sedimentary deformation, diapirs, and contourites. The main spreading axis of theCentral Bransfield Basin connecting Deception and Bridgeman Islands continues up to the central part ofthe Eastern Basin, whereas deep basin covered by thick sediments without any spreading structures developsin the northeastern part. This indicates that back-arc spreading along the axis of the Bransfield Basin hasbeen taken place in the southwestern part of the Eastern Basin, not in the northeastern part. Many NW-SEtrending faults perpendicular to the axis of the basin would be related with strike-slip movement of theShackleton Fracture. Zone. Extensinal strutures like deep basin without any spreading structures in thenortheastern part, normal faults and diapirs on both continental slopes of the Eastern Basin would be formedby extension as a consequence of the sinistral movement between Antarctic and the Scotia plates.
URI
http://repository.kopri.re.kr/handle/201206/6630
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