现代地质Issue(6)：1392-1398,7.
青藏高原乌丽冻土区二氧化碳成因探讨
Discussion about the CO2 Origins of Wuli Permafrost Zone in Qinghai-Tibetan Plateau
摘要
Abstract
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.关键词
成因/二氧化碳/乌丽冻土区/青藏高原Key words
origin/carbon dioxide/Wuli permafrost zone/Qinghai-Tibetan Plateau分类
能源科技引用本文复制引用
杨德寿,龚建明,贺行良,王慧东,陈俊文,杨志承,蒋玉波..青藏高原乌丽冻土区二氧化碳成因探讨[J].现代地质,2013,(6):1392-1398,7.基金项目
国家自然科学基金项目（41273066）；青海省治多县乌丽地区天然气水合物调查项目。 （）
