| 晋城矿区粘土矿物特征及沉积-成岩响应 |
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| 引用本文： | 温兆翠,姜波,刘明银.晋城矿区粘土矿物特征及沉积-成岩响应[J].中国煤炭地质,2011(7):10-13. |
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| 作者姓名： | 温兆翠 姜波 刘明银 |
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| 作者单位： | [1]中国矿业大学资源与地球科学学院,江苏徐州221116 [2]煤炭工业太原设计研究院,山西太原030000 |
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| 摘 要： | 在X射线衍射和扫描电镜观测的基础上,结合区域沉积演化分析,探讨了晋城矿区粘土类型、组合特征、微观结构与沉积-成岩作用的关系。结果表明,晋城矿区粘土矿物以高岭石为主,其次为伊利石和伊利石/蒙脱石混层,还有少量的绿泥石和蒙脱石;山西组粘土矿物颗粒排列定向性优于太原组,多呈带状或平叠状产出,而太原组多为蜂巢状、花朵状或凝絮状;由于太原期频繁的海侵海退致使煤层顶底板处于pH值较高的碱性环境,使成岩过程中高岭石向伊利石转化,造成太原组粘土矿物的伊利石含量明显高于山西组,而高岭石含量相对较低。
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| 关 键 词： | 粘土矿物 X射线衍射 扫描电镜 沉积-成岩响应 晋城矿区 |
Clay Mineral Characteristics and Sedimentary-Diagenetic Responses in Jincheng Mining Area |
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| Wen Zhaocui,Jiang Bo and Liu Mingyin.Clay Mineral Characteristics and Sedimentary-Diagenetic Responses in Jincheng Mining Area[J].Coal Geology of China,2011(7):10-13. |
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| Authors: | Wen Zhaocui Jiang Bo and Liu Mingyin |
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| Institution: | 1.School of Resource and Earth Science,CUMT,Xuzhou,Jiangsu 221116; 2.Taiyuan Design Research Institute for Coal Industry,Taiyuan,Shanxi 030000) |
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| Abstract: | Based on the X-ray diffraction and scanning electronic microscopic observations,combining with regional sedimentary evolution analysis,discussed relation between clay types,combination features,microstructures and sedimentation-digenesis.The result shows that clay minerals in the Jincheng mining area are mainly kaolinite,then illite and illite/montmorillonite mixed layers and a small quantity of chlorite and montmorillonite.Grain packing directionalities of clay minerals in Shanxi Formation are superior to those in Taiyuan Formation and present banded or flat-stacked occurrences,while in Taiyuan Formation mainly alveolar,rosette or floccular.Since frequent transgression and regression during Taiyuan Stage caused coal floor stood in higher pH basic environment,brought kaolinite converted into illite during diagenesis,caused illite content in Taiyuan Formation obviously higher than in Shanxi Formation,while kaolinite content relatively lower. |
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| Keywords: | clay mineral X-ray diffraction scanning electronic microscope sedimentary-diagenetic response Jincheng mining area |
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