兖州矿区红层砂岩中自生绿泥石的产状和成因

运用带有Ｘ射线能谱仪的扫描电子显微镜，详细研究了兖州矿区上侏罗统红层砂岩中自生绿泥石的产状、成因及其水文地质意义．根据其在砂岩孔隙中的分布特征及其与颗粒骨架的关系，自生绿泥石的产状可分为网膜式，渡桥式和填隙式（玫瑰花状集合体）３种；依据扫描电镜图片中矿物间的赋存关系并参考其化学成分、矿物成分和成岩环境，自生绿泥石的成因被划分为高岭石蚀变形、钾长石蚀变形和酸性热液生成３类．

Occurrence and Genesis of Authigenic Chlorite in Late Jurassic Red Bed Sandstone in Yanzhou Coal Mining Area

Using scanning electron microscope with X ray energy dispersive spectrometer, the authors studied the occurrence and genesis of authigenic chlorite in Late Jurassic red bed sandstone in Yanzhou Coal Mining Area. According to its occurrence feature in pores or fissures and relationship with grain, authigenic chlorites can be divided into the following three types: net film like (grain coating), bridge like between pore or fissures and pore filling (rosette like clusters of crystal plates). Based on its occurrence featrue and relations with other minerals, and taking into account of chemical, mineral composition and diagenetic environmental conditions of red bed, the authigenic chlorite can be divided into three genetic types: kaolinite chlorization type, potassium feldspar chloritization type and the type formed by acidic thermal flow from intrusive rock.