| Sedimentary environments of organic matter from Middle Permian source rocks in northern Xinjiang, China |
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| 作者姓名： | 苗建宇 寇韩生 周立发 韩宗元 |
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| 作者单位： | State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China，Changqing Petroleum Exploration Bureau Training Center Qingyang 745217 China，State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China，State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 1IntroductionThe formation of the Junggar,Turpan and Ili ba-sins is ascribed to Hercynian orogeny between theJunggar and Tianshan Mountains during the MiddlePermian.The rock assemblage of thick and stable sedi-mentary dark muddy shales interbedded with th…
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| 关 键 词： | 烃源岩 沉淀性 二叠纪 新疆 有机物质 石油 |
Sedimentary environments of organic matter from Middle Permian source rocks in northern Xinjiang, China |
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| Miao Jianyu,Kou Hansheng,Zhou Lifa,Han Zhongyuan.Sedimentary environments of organic matter from Middle Permian source rocks in northern Xinjiang, China[J].Chinese Journal of Geochemistry,2006,25(3):258-265. |
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| Authors: | Miao Jianyu Kou Hansheng Zhou Lifa Han Zhongyuan |
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| Institution: | (1) State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, 710069 Xián, China;(2) Changqing Petroleum Exploration Bureau Training Center, 745217 Qingyang, China |
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| Abstract: | A systematic analysis of the inorganic and organic geochemistry of Middle Permian source rocks comprising carbonate rocks and mudstones was carried out, with samples collected from the outcrop and bore of the Junggar, Turpan and Ili basins in northern Xinjiang. This study confirmed that sedimentary parameters for an ancient water body, such as inorganic geochemistry and paleosalinity, have a close relation to the organic matter of source rocks. It is also disclosed that phytane predominance in the source rocks is mainly due to a reducing environment. Biomarkers, such as gammacerane and β-carotene, in the samples reflect a specific salinity in the sedimentary environments. Sedimentary zones with a strong reducing environment are more likely to produce deposits of primary organic matter, which will be buried and preserved contemporarily. Consequently, the source rocks are generally high in organic content and better in organic type than ordinary ones, and vice versa. |
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| Keywords: | source rock geochemistry Middle Permian northern Xinjiang China |
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