| 淮北煤田祁东煤矿煤和瓦斯中稳定碳同位素分布特征及其地质成因 |
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| 引用本文： | 徐超,陈冰宇,吴盾,丁典识,夏源源,刘桂建.淮北煤田祁东煤矿煤和瓦斯中稳定碳同位素分布特征及其地质成因[J].煤田地质与勘探,2017,45(3):54-58. |
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| 作者姓名： | 徐超 陈冰宇 吴盾 丁典识 夏源源 刘桂建 |
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| 基金项目： | 国家自然科学基金项目（41373110，41502152） |
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| 摘 要： | 对淮北煤田祁东煤矿6个煤层的24个煤样和12个气样的稳定有机碳同位素分析，分别研究了煤和瓦斯中碳同位素的分布特征和变化趋势，为不同煤层及瓦斯源分析提供理论依据。研究表明:祁东煤矿煤的δ13C为-25.11‰~-22.76‰，6-1煤层至9煤层碳同位素均值呈波动变化，可能受当时成煤时期沉积环境的影响；瓦斯的δ13C1为-63.65‰~-52.51‰，表现出次生生物成因气的变化特征，二氧化碳碳同位素特征（-22.61‰~-17.96‰）表明其均是煤热解而来。
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| 关 键 词： | 祁东煤矿 淮北煤田 碳同位素 煤层气 |
| 收稿时间： | 2016-08-12 |
Distribution characteristics of isotope carbon and its geological origin in coal & gas carbon of Qidong coal mine,Huaibei coalfield |
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| Abstract: | Based on stable organic carbon isotopic analysis for 24 coal sample and 12 gas samples from six coal seams in Qidong coal mine, Huaibei coalfield, the paper has studied distribution characteristics and variation trend of the coal and gas carbon isotope, providing the theoretical basis for the analysis of different coal seams and gas sources. The study shows:Variation range of δ13C is -22.76‰~-25.11‰. δ13C value in coal seams 6-1 to 9 presents undulated variation, probably influenced by the coal depositional environment; Variation range of methane δ13C1 is -52.51‰~-63.65‰, The variation range of δ13C1 is characterized by containing secondary biogenic gas. And the CO2 carbon isotopic values (-22.61‰~-17.96‰) demonstrated that CO2 in methane was resulted from coal pyrolysis. |
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