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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/40690

Title: A first application of marine-controlled source method on gas-hydrate study off SW Taiwan
Authors: C. Chiang
Shu-Kun Hsu
Chiajung Chen
Rob L. Evans
Contributors: 國立臺灣海洋大學:應用地球科學研究所
Date: 2011-12
Issue Date: 2017-02-06T05:33:41Z
Publisher: Fall Meeting, San Francisco, USA
Abstract: Abstract: Bottom simulating reflector (BSR), high methane flux, shallow sulfide/methane interface, fluid gushed from the seafloor, self-carbonate within sediment, methane reef, and self-biome are widely distributed in the offshore of the southwestern Taiwan. These geophysical and geochemistry signatures imply a high gas hydrate reservoir area. However, the upper bound of the gas hydrate and shallow section of the sediment are still unclear. This study shows the results of our first marine controlled-source electromagnetic survey in 2010 and provides the information of shallow sediment around the offshore of southwestern Taiwan. Three target areas were conducted: the southeast of Small Ryukyu Islands (seepage, G96), west of Yung-An Ridge (YAR) and northwest of Good Weather Ridge (GWR). In total, fourteen survey lines have been carried out, and the total survey length is about 72 km. Our preliminary result shows that the resistivity/porosity anomalies within pockmarks and seepages correspond to the features from the sub-bottom profilers. The range of porosity change is 4 % in G96 and YAR sites, while in the GWR site there is up to 8 % of porosity change and implies a high gas hydrate potential area.
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/40690
Appears in Collections:[應用地球科學研究所] 演講及研討會

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