Geothermal investigation of the thickness of gas hydrate stability zone in the north continental margin of the South China Sea

作     者：WANG Yanmin LIU Shaowen HAO Feifei ZHAO Yunlong HAO Chunyan 

作者机构：School of Geographic and Oceanographic Sciences Nanjing University Nanjing 210023 China Ministry of Education Key Laboratory for Coast and Island Development Nanjing University Nanjing 210023 China Collaborative Innovation Center of South China Sea Studies Nanjing 210093 China 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2017年第36卷第4期

页      面：72-79页

核心收录：

学科分类：0710[理学-生物学] 0908[农学-水产] 0707[理学-海洋科学] 08[工学] 0824[工学-船舶与海洋工程] 

基　　金：The National Natural Science Foundation of China under contract No.41176037 the Ministry of Science and Technology Project under contract No.2016ZX05026-002-007 the New Century Excellent Talents Program of MOE under contract No.NCET-12-263 Jiangsu Province College Student Scientific Training Program under contract No.XZ1210284007 

主　　题：gas hydrate thickness of stability zone heat flow continental margin South China Sea 

摘      要：The exploration of unconventional and/or new energy resources has become the focus of energy research worldwide,given the shortage of fossil *** a potential energy resource,gas hydrate exists only in the environment of high pressure and low temperature,mainly distributing in the sediments of the seafloor in the continental margins and the permafrost zones in *** accurate determination of the thickness of gas hydrate stability zone is essential yet challenging in the assessment of the exploitation *** majority of previous studies obtain this thickness by detecting the bottom simulating reflectors（BSRs） layer on the seismic *** phase equilibrium between gas hydrate stable state with its temperature and pressure provides an opportunity to derive the thickness with the geothermal *** on the latest geothermal dataset,we calculated the thickness of the gas hydrate stability zone（GHSZ） in the north continental margin of the South China *** results indicate that the thicknesses of gas hydrate stability zone vary greatly in different areas of the northern margin of the South China *** thickness mainly concentrates on 200–300 m and distributes in the southwestern and eastern areas with belt-like *** further confirmed a certain relationship between the GHSZ thickness and factors such as heat flow and water *** thickness of gas hydrate stability zone is found to be large where the heat flow is relatively *** GHSZ thickness increases with the increase of the water depth,but it tends to stay steady when the water depth deeper than 3 000 *** findings would improve the assessment of gas hydrate resource potential in the South China Sea.