Distribution of the Bottom-Simulating Reflector in the Offshore Taiwan Collision Zone
Other Title
臺灣南部海域碰撞袋中海底仿擬反射的分布
Journal
Terrestrial, Atmospheric and Oceanic Sciences
Journal Volume
9
Journal Issue
4
Pages
779-794
Date Issued
1998
Author(s)
Abstract
A bottom-simulating reflector (BSR) has been identified in the offshore Taiwan accretionary prism using both migrated 6-channel and 120-chan nel reflection profiles. The BSR is marked by a reversed polarity reflector that increases in sub-bottom depth with increasing water depth, suggesting that the BSR marks the base of the methane hydrate stability field. The BSR is located in offscraped sediments derived from the Taiwan orogen and the Chinese continental margin, which may contain high amounts of organic carbon, thereby providing a source for the methane. Gas seepage found on land north of this region also supports the presence of methane in these strata. The BSR is typically located in the crests of anticlines and mud volcanoes, implying the migration and entrapment of methane gas.
SDGs
Publisher
中華民國地球科學學會
Type
journal article
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