煤系高岭岩成矿机理  

Mineralization mechanism of kaolinite rocks in coal measures

作　　者：杨晓杰[1] 刘冬明[1] 褚立孔[1] 陈开惠[2] 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]中国科学院地质与地球物理研究所,北京100029

出　　处：《煤炭学报》2006年第1期85-89,共5页Journal of China Coal Society

基　　金：北京市自然科学基金资助项目(3042013)

摘　　要：在阐述研究区高岭岩矿床地质特征的基础上,利用高倍偏光显微镜、X-射线衍射、红外吸收光谱、扫描电镜结合能谱、探针和X-荧光光谱等多种分析测试方法,对研究区高岭岩的矿物成分、化学成分、显微结构、地化特征进行了全面分析,建立了研究区高岭岩矿石宏观-微观综合分类,对该矿床的成矿机理进行了深入探讨.研究表明:研究区煤系高岭岩成矿母质主要来源于酸性岩石,包括源区花岗岩类和酸性火山灰;陆源高岭石黏粒的絮凝作用、陆源氧化铝-氧化硅溶胶的胶凝作用和陆源碎屑的转变作用是研究区高岭岩成矿的主要机理;在煤层顶底板夹矸高岭岩中,生物成矿作用占有重要地位.Based on the elaboration of the geological properties of deposit in the research area, the mineral ingredient, chemical composition, microstructures and geochemistry properties of the kaolinite rocks were analyzed by such measument methods as XRD, IR, SEM and so on, and the macroscopical and microcosmic synthetical classification of the kaolinite rocks was established, and the mineralize mechanism of the deposit was deeply probed in. It showed that the kaolinite mother rocks are mainly derived from acid rocks including granite and acid volcanic ash in the source area, the flocculating effect of kaolinites clay particles, gelation of Al2O3 - SiO2 colloid and transformation of the clastic rock from the source area are the three main mineralization of kaolinite rocks, and biomineralization effect plays an important role in the mineralization of kaolinite rocks at the roof or base of coal bed.

关 键 词：高岭岩 成矿机理 絮凝作用 胶凝作用 生物成矿作用 

分 类 号：P536[天文地球—古生物学与地层学]