| 阳泉矿区1612孔峰峰组岩石学特征及沉积环境分析 |
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| 引用本文： | 刘丽.阳泉矿区1612孔峰峰组岩石学特征及沉积环境分析[J].中国煤炭地质,2010(12):7-10. |
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| 作者姓名： | 刘丽 |
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| 作者单位： | 中国矿业大学资源与地球科学学院,江苏徐州221116 |
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| 摘 要： | 阳泉矿区是我国重要的无烟煤生产基地之一,现主采太原组15号煤,下伏中奥陶统作为一个复杂含水层以其分布广、厚度大、水量丰富、补给条件好而对下组煤(太原组)带压开采造成严重威胁。通过对矿区1612号水文孔岩心的观察描述,结合测井曲线及偏光显微镜等对峰峰组的岩石学特征及沉积相进行了研究。研究表明,峰峰组主要由碳酸盐岩、硫酸盐岩及次生角砾岩组成,成岩作用主要有压实作用、压溶作用、白云化作用、重结晶作用、溶蚀作用、充填作用等;峰峰组沉积相具二分性,一段属局限台地相,二段属开阔台地相。
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| 关 键 词： | 岩石学特征 沉积相 峰峰组 中奥陶统 阳泉矿区 |
Yangquan Mining Area No.1612 Borehole Fengfeng Formation Petrological Characteristics and Sedimentary Environment Analysis |
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| Liu Li.Yangquan Mining Area No.1612 Borehole Fengfeng Formation Petrological Characteristics and Sedimentary Environment Analysis[J].Coal Geology of China,2010(12):7-10. |
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| Authors: | Liu Li |
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| Institution: | Liu Li(School of Resources and Geoscience,CUMT,Xuzhou,Jiangsu 221116) |
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| Abstract: | The Yangquan mining area is one of the most important anthracite production bases in the country,the No.15 coal seam is the primary mineable coal bed under which lies Ordovician limestone aquifer.It is seriously threatening the mining of lower coal group in the Taiyuan Formation,due to its wide distribution,large thickness,large amount of water and rich replenishment.Through observation of rock cores from No.1612 hydrogeological exploration borehole,combined with logging traces and polarizing microscopic observations,have concluded that the Fengfeng Formation is mainly comprised of carbonate rocks,sulfate rocks and secondary breccias,the main lithogeneses have compaction,pressure solution,dolomitization,recrystallization,dissolution and cavity filling.The sedimentary facies of Fengfeng Formation is bisected,the upper member was formed in a limited tableland,while the lower member in an open tableland. |
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| Keywords: | petrological characteristics sedimentary facies Fengfeng Formation Middle Ordovician Yangquan mining area |
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