柴西地区第三系发育平行层面缝岩石的粘土矿物特征  

Clay Characteristics of Tertiary Rocks with Parallel Level Fractures in Western Qaidam Basin

作　　者：畅斌[1] 张金功[1] 

机构地区：[1]西北大学地质学系大陆动力学国家重点实验室,陕西西安710069

出　　处：《矿物学报》2013年第1期57-62,共6页Acta Mineralogica Sinica

基　　金：国家油气专项(批准号:XQ-2004-01)

摘　　要：柴西地区第三系地层中多发育平行层面缝,通过岩心及荧光显微镜观察并借助扫描电子显微镜(SEM)和X射线衍射仪(XRD),确定了柴西地区第三系发育平行层面缝岩石自上而下存在2种粘土矿物组合:伊/蒙间层+伊利石+绿泥石+(高岭石)→伊利石+绿泥石+伊/蒙间层+绿/蒙间层+(高岭石),粘土矿物占全岩矿物比例介于7%～27%之间,粘土矿物吸附并保存了有机质,这是异常高压、强还原环境、有机质及平行层面缝优势输导体系和强水动力作用多种因素叠加影响的结果。Core sample and microscopic fluorescent observation, SEM and X-ray diffraction research showed that there are two types of clay minerals combination from top to bottom of parallel level fractures, the Tertiary in western Qaidam basin： I/S＋I＋CH＋（K）-I＋CH＋I/S＋C/S＋（K）. Contents of clay minerals lie between 7%-27%, and tend to decrease gradually with increasing depth. Organo clay complexe is the consequence of abnormal high fluid pressure, reduction environment, orlzanic matter, passage system of fractures and hydrodynamic force.

关 键 词：柴西 第三系 平行层面缝 粘土矿物 

分 类 号：P571[天文地球—矿物学] P575.2[天文地球—地质学]