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Methane, (CH4)-bearing fluid inclusions in the Myanmar jadeitite

文献类型：期刊论文

作者Shi, GU; Tropper, P; Cui, WY; Tan, J; Wang, CQ
刊名GEOCHEMICAL JOURNAL
出版日期2005
卷号39期号:6页码:503-516
关键词Fluid Inclusions Jadeitite Methanogenesis Methane (Ch4) Myanmar
ISSN号0016-7002
文献子类Article
英文摘要A combined hydrogen-carbon-isotope and microthermometric study has been carried out on CH4-bearing fluid inclusions in high-pressure jadeitites from the famous jadeite tract Myanmar. Two types of fluid inclusions were found in jadeites, large H2O-rich and CH4-poor inclusions and small H2O-poor and CH4-rich inclusions, thus indicating a possible entrapment of CH4-H2O fluids under unmixing conditions. Microthermometric results yield lower temperature limits for the entrapment of the,e fluid inclusions of ca. 300 to 400 degrees C. The bulk composition of the fluid inclusions is mostly H2O (87 to 94 mol.% H2O) and the isotopic composition of methane and water in the inclusions is characterized by delta C-13(CH4) values ranging from -30.1 to -25.5 parts per thousand, and delta D(H2O) values ranging from -56.3 to -49.8 parts per thousand. The stable isotope data would be indicative of an abiogenic mechanism of CH4 formation; the occurrence of the jadeite veins in this paleo-subduction zone thus most likely point to the formation of these CH4-bearing fluid inclusions by abiogenic thermal maturation of subducted organic carbon. These data not only provide evidence for cycling of organic carbon in paleo-subduction zones but also show that CH4 not only occurs as shallow CH4-rich plumes in accretionary prisms of recent subduction zones but also occurs in deeper portions of at least the upper 20 km of paleo-subduction zones.
WOS关键词HYDROGEN ISOTOPE GEOCHEMISTRY ; ULTRAHIGH-PRESSURE ECLOGITES ; DABIE-SULU TERRANES ; MOTAGUA FAULT ZONE ; MID-ATLANTIC RIDGE ; OXYGEN-ISOTOPE ; METAMORPHIC ROCKS ; UHP METAMORPHISM ; EASTERN CHINA ; NORTHWESTERN MYANMAR
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000233735600003
出版者GEOCHEMICAL SOC JAPAN
源URL[http://ir.iggcas.ac.cn/handle/132A11/65314]  
专题中国科学院地质与地球物理研究所
通讯作者Shi, GU
作者单位1.China Univ Geosci, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
3.Univ Innsbruck, Inst Mineral & Petrog, Fac Geo & Atmospher Sci, A-6020 Innsbruck, Austria
4.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
推荐引用方式
GB/T 7714		 Shi, GU,Tropper, P,Cui, WY,et al. Methane, (CH4)-bearing fluid inclusions in the Myanmar jadeitite[J]. GEOCHEMICAL JOURNAL,2005,39(6):503-516.
APA Shi, GU,Tropper, P,Cui, WY,Tan, J,&Wang, CQ.(2005).Methane, (CH4)-bearing fluid inclusions in the Myanmar jadeitite.GEOCHEMICAL JOURNAL,39(6),503-516.
MLA Shi, GU,et al."Methane, (CH4)-bearing fluid inclusions in the Myanmar jadeitite".GEOCHEMICAL JOURNAL 39.6(2005):503-516.

入库方式： OAI收割

来源：地质与地球物理研究所

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