Natural gas hydrates in the Qinghai-Tibet Plateau: Characteristics, formation, and evolution

作     者：You-hai Zhu Shou-ji Pang Rui Xiao Shuai Zhang Zhen-quan Lu You-hai Zhu;Shou-ji Pang;Rui Xiao;Shuai Zhang;Zhen-quan Lu

作者机构：Oil and Gas Resources SurveyChina Geological SurveyBeijing 100083China 

出 版 物：《China Geology》 (中国地质（英文）)

年 卷 期：2021年第4卷第1期

页      面：17-31页

学科分类：081803[工学-地质工程] 0709[理学-地质学] 0819[工学-矿业工程] 0908[农学-水产] 08[工学] 0710[理学-生物学] 0707[理学-海洋科学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0815[工学-水利工程] 0705[理学-地理学] 0816[工学-测绘科学与技术] 0813[工学-建筑学] 0814[工学-土木工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：the China Geological Survey entitled Comprehensive Survey of Terrestrial NGH Resources(DD20190102). 

主　　题：Natural gas hydrates(NGH) Permafrost Global climate change Qinghai-Tibet Plateau 

摘      要：The Qinghai-Tibet Plateau(also referred to as the Plateau)is the largest area bearing alpine permafrost region in the world and thus is endowed with great formation conditions and prospecting potential of natural gas hydrates(NGH).Up to now,one NGH accumulation,two inferred NGH accumulations,and a series of NGH-related anomalous indicators have been discovered in the Plateau,with NGH resources predicted to be up to 8.88×10^(12) m^(3).The NGH in the Qinghai-Tibet Plateau have complex gas components and are dominated by deep thermogenic gas.They occur in the Permian-Jurassic strata and are subject to thin permafrost and sensitive to environment.Furthermore,they are distinctly different from the NGH in the high-latitude permafrost in the arctic regions and are more different from marine NGH.The formation of the NGH in the Plateau obviously couples with the uplift and permafrost evolution of the Plateau in spatial-temporal terms.The permafrost and NGH in the Qilian Mountains and the main body of the Qinghai-Tibet Plateau possibly formed during 2.0–1.28 Ma BP and about 0.8 Ma BP,respectively.Under the context of global warming,the permafrost in the Qinghai-Tibet Plateau is continually degrading,which will lead to the changes in the stability of NGH.Therefore,The NGH of the Qinghai-Tibet Plateau can not be ignored in the study of the global climate change and ecological environment.