Seismic structures of the western Bransfield Strait, Antarctic Peninsula: rift propagation from northeast to southwest

Title
Seismic structures of the western Bransfield Strait, Antarctic Peninsula: rift propagation from northeast to southwest
Author(s)
진영근; 김예동; 남상헌; 김규중
Publication Year
2002-01-01
Abstract
Bransfield Strait is a marginal basin formed by recent extension between the northern Antarctic Peninsula and the South Shetland Islands. New seismic profiles obtained from the western Bransfield Strait show the variation of crustal structures along the strait: (1) well-defined volcanic ridges in the axial deep of the basin to the NE of Deception Island, (2) many small-scale volcanic structures in the vicinity of Deception Island associated with Deception Island volcanism, (3) extensive crustal deformation by a series of normal faults without axial volcanism to the SW of Deception Island. This variation is clear evidence of NE to SE rift propagation from initial seafloor spreading in the Central Bransfield Basin to continental crustal extension in the Western Bransfield Basin. Deception Island is a bathymetric and tectonic boundary between the two basins, and may have acted as a frontal volcanic center to initiate new seafloor spreading or a barrier to rift propagation into the Western Bransfield Basin.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/32669
Bibliographic Citation
Proceedings of the 8th International Symposium on Antarctic Earth Sciences, pp.499 - 506, 2002
Publisher
The Royal Society of New Zealand
Type
Conference
Language
English
Publisher
The Royal Society of New Zealand
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