The characteristics of geophysical field and tectonic evolution in the Bransfield Strait

Having analyzed the data collected by our survey ship "Ocean IV" in the Bransfield Strait in 1991, we recognized that the geomorphology, gravity and magnetic anomalies trending NE direction along bandings. The sediments in the Bransfield Strait can be subdivided into two sequences: the fir...

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Bibliographic Details
Main Authors: Bochu, Yao, Guangyu, Wang, Bangyan, Chen, Shengyuan, Chen
Format: Article in Journal/Newspaper
Language:English
Published: Polar Research Institute of China - PRIC 1995
Subjects:
Antarctic
The Antarctic
Antarctic Peninsula
South Shetland Islands
Bransfield Strait
Bransfield Trough
Advances in Polar Science
Antarc*
Polar Science
Online Access:http://library.arcticportal.org/2088/
http://library.arcticportal.org/2088/1/A501.001.pdf
Description
Summary:Having analyzed the data collected by our survey ship "Ocean IV" in the Bransfield Strait in 1991, we recognized that the geomorphology, gravity and magnetic anomalies trending NE direction along bandings. The sediments in the Bransfield Strait can be subdivided into two sequences: the first rifting sequence and the second rifting sequence. The basement was faulted into a half-graben in northwestern side of the Bransfield trough. Considering the crustal structure crossing the South Shetland Islands, the Bransfield Strait and the Antarctic Peninsula, we propose a two-phase rifting tectonic evolution model and a layered-shear model for the lithospheric deformation under the effects of extensional stress field.

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