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| Geochemical characteristics of Jurassic coal and significance for the evolution of the environment, Yanqi Basin, China | |
| 作者姓名： | WU Chaodong XU Youling GUO Zhaojie QUAN Shujin LI Yonglin FENG Xue |
| 作者单位： | 1. Key Laboratory of Orogenic Belts and Crustal Evolution of Department of Education, Peking University, Beijing 100871, China; 2. 3rd Geological Survey Brigade, Henan Bureau of Mineralogical and Resources, Xinyang 476000, China; 3. Exploration & Development Research Institute of Henan Oilfield, SINOPEC, Nanyang 473132, China |
| 基金项目： | 国家重点基础研究发展计划(973计划) |
| 摘 要： | The Mesozoic strata of the Yanqi Basin consists of coarse debris with coal beds, characterized by the developments of coal seams of the Jurassic sediments whose main petrologic contents are glutenite, fine sandstone, mudstone, carbonaceous shale and coal. Based on the analyses of the minerals, trace elements and REEs, we try to find geochemical characteristics of the coal seam formation process. The analysis results indicate that the contents of ash and sulfur are low while the content of phosphor is comparatively high, and that the specific value of Al2O3/SiO2 is relatively high and that of （Al2O3+SiO2）／（Fe2O3+CaO+MgO） is near 1. All these results indicate that the coal seams are formed in the relatively deep marsh, which is favorable for the evolvement of hydrocarbon at the diagenesis stage. |
| 关 键 词： | coal sedimentary geochemistry trace elements Jurassic. |
Geochemical characteristics of Jurassic coal and significance for the evolution of the environment, Yanqi Basin, China |
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| WU Chaodong,XU Youling,GUO Zhaojie,QUAN Shujin,LI Yonglin,FENG Xue.Geochemical characteristics of Jurassic coal and significance for the evolution of the environment, Yanqi Basin, China[J].Progress in Natural Science,2006,16(9):974-982. | |
| Authors: | WU Chaodong XU Youling GUO Zhaojie QUAN Shujin LI Yonglin FENG Xue |
| Institution: | 1. Key Laboratory of Orogenic Belts and Crustal Evolution of Department of Education, Peking University, Beijing 100871, China 2. 3rd Geological Survey Brigade, Henan Bureau of Mineralogical and Resources, Xinyang 476000, China 3. Exploration & Development Research Institute of Henan Oilfield, SINOPEC, Nanyang 473132, China |
| Abstract: | The Mesozoic strata of the Yanqi Basin consists of coarse debris with coal beds, characterized by the developments of coal seams of the Jurassic sediments whose main petrologic contents are glutenite, fine sandstone, mudstone, carbonaceous shale and coal. Based on the analyses of the minerals, trace elements and REEs, we try to find geochemical characteristics of the coal seam formation process. The analysis results indicate that the contents of ash and sulfur are low while the content of phosphor is comparatively high, and that the specific value of Al2O3/SiO2 is relatively high and that of (Al2O3 + SiO2)/(Fe2O3 + CaO+ MgO) is near 1. All these results indicate that the coal seams are formed in the relatively deep marsh, which is favorable for the evolvement of hydrocarbon at the diagenesis stage. |
| Keywords: | coal sedimentary geochemistry trace elements Jurassic |
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