• 责任者：Yang Deshou (Qinghai Coal Geological Exploration Institute ; Xining 810001 ; China) ; Gong Jianming
• 刊名：Geoscience
• 出版年：2013
• 卷期：27(6)
• 关键词：二氧化碳 ; carbon dioxide ; 天然气成因 ; natural gas origin ; 青藏高原 ; Qinghai-Tibetan Plateau
• 页码：p.1392-1398
• 图表：3 illus., 4 tables, 18 refs.
• 分类号：1003
• issnNo：ISSN1000-8527
• isbnNo：CN11-2035/P

     In order to understand the component and origin of gases from gas-hydrate drillhole （ZK1）in Wuli permafrost zone,Qinghai-Tibetan Plateau,the gas components and the carbon isotopes of headspace gas samples and resolving gas samples from hole ZK1 and its adjacent drillholes and gas samples from lake water are ana-lyzed.At the same time,the carbon isotopes of carbonate rocks from cores are also analyzed.The results show that more than 98% natural gas is composed of carbon dioxide with a little hydrocarbon gas（mainly methane）, the main maximum values of δ13 CCOδ13 CCH 4 2 are between -4‰ and -6‰（VPDB）,the main maximum values of from a few rich-methane samples are between -32.38‰ and -27.82‰（VPDB）,while the mean val-ue of δ13 CCaCO 3 is -3.87‰（VPDB）.Integrated with regional geology,it could be drawn a conclusion that the CO2 of Wuli permafrost zone is mainly of volcanic mantle type,which is related with strong tectonic movement and magma activities.