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《Geological Science and Technology Information》 2010-02
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Tectonic Settings Analysis of Gas Hydrate Deposits Development

WANG Jian1,QIU Wen-xian1,ZHAO Li-hong2a,2b,3(1. Graduate School,China University of Geosciences,Wuhan 430074,China;2a.Second Institute of Oceanography; 2b.Key Laboratory of Submarine Geosciences,State Oceanic Administration,Hangzhou 310012,China;3.Shandong University of Science and Technology,Qingdao Shandong 266510,China)  
Natural gas hydrates are an important potential energy source for the 21st century. Based on the published drilling data and seismic reflection profiles,the accretionary prism,fault-folded system,mud volcano/mud diapir,slide,submarine fan,pockmark and permafrost region were recognized for the tectonic settings of gas hydrate. On the one hand,this tectonics can be regarded as good conduits for the formation of gas hydrate deposits,and on the other hand,the deposits can be destructed by this tectonics. Gas hydrate concentration in sediments is relatively high because of rapid transport of gas from great depth along these highly permeable tectonic conduits. Hence,gas hydrates can be dissociated when their equilibrium conditions are broken by the tectonic movements or the heat flow transported along these tectonic conduits. This gas hydrate dissociation may also lead to the submarine landslide.
【Fund】: 国家海洋局第二海洋研究所基本科研业务费专项(JB0701);; 山东省教育厅科技计划项目(J08LB53);; 浙江省博士后科研项目择优资助项目
【CateGory Index】: P744.4
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