| A study on Emei mantle plume activity and the origin of high-As coal in southwestern Guizhou Province |
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| 作者姓名： | 聂爱国 谢宏 |
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| 作者单位： | Kunming University of Science and Technology Kunming 650039 China，Guizhou University Guiyang 550003 China，Guizhou University Guiyang 550003 China |
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| 基金项目： | The research project was financially supported by the Foundation of Visiting Scholars under the Ministry of Education, Key Laboratory for the Controlling Engineering of Southwestern Resource Developmerct, Environment and Calamity, Chongqing University （Grant No. 3 [2001] ） Document issued by the Department of Education and Technology; the Scientific Research Project of Guizhou Provincial Department of Education （Grant No. Qian Jiao Ke 2001016）. |
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| 摘 要： | 1IntroductionIn recent years deep-going investigations into thestructure of the deep interior of the Earth have provedthat the region of Southwest China where the Emeishanbasalts are widespread is an igneous rock provincecommonly accepted by the internati…
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| 关 键 词： | 地幔 活动性 煤 贵州 地质条件 |
A study on Emei mantle plume activity and the origin of high-As coal in southwestern Guizhou Province |
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| Nie Aiguo,Xie Hong.A study on Emei mantle plume activity and the origin of high-As coal in southwestern Guizhou Province[J].Chinese Journal of Geochemistry,2006,25(3):238-244. |
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| Authors: | Nie Aiguo Xie Hong |
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| Institution: | (1) Kunming University of Science and Technology, 650039 Kunming, China;(2) Guizhou University, 550003 Guiyang, China |
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| Abstract: | The Emei mantle plume activity lasted for a long period of time ranging from the whole Late Paleozoic to Mesozoic. The large-scale Emeishan basalt eruption marked the summit period of mafic magmatic activity between Early and Late Permian. Lots of Au, As, Hg, Sb and other trace elements, in the form of extreme dispersion, found their way into coal seams of the Longtan Formation in the transitional zone between platform facies and slope facies at the margin of the platform around the areas of Xingyi, Anlong, Xingren and Zhenfeng in southwestern Guizhou Province. During the Yanshanian Emei mantle plume activity, large amounts of ore-forming elements such as As, Au, Hg, Sb, etc. were extracted from the Emeishan basalt and coal seams by hydrothermal solutions, followed by their mobilization and transport. When the hydrothermal solutions passed through the coal measures of the Longtan Formation, the element As was enriched locally to form high-As coal.; The intensive Emei plume activity provided the material source of As and dynamic source for the formation of high-As coal in southwestern Guizhou Province. |
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| Keywords: | Emei mantle plume activity high-As coal origin southwestern Guizhou Province |
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