内蒙古东北部上二叠统林西组暗色泥岩有机地球化学特征及其意义  

Organic geochemical characteristics of dark mudstone in Upper Permian Linxi Formation from Northeast Inner Mongolia,China

作　　者：陈晨[1] 彭晓蕾[1] 洪雪[2] 罗琛 

机构地区：[1]吉林大学地球科学学院,长春130061 [2]中国石化集团东北石油局,长春130062 [3]吉林省地质科学研究所,长春130021

出　　处：《世界地质》2013年第2期331-336,共6页World Geology

基　　金：国土资源部油气专项(2009GYXQ12);国家自然科学基金(40972075)联合资助

摘　　要：对内蒙古东北部地区进行野外地质勘查、典型剖面实测、样品采集及实验分析,确定上二叠统林西组为暗色泥岩发育的重要层位。应用有机岩石学与有机地球化学分析方法对林西组暗色泥岩进行研究显示,林西组暗色泥岩有机碳含量为0.45%～3.55%,平均值为1.09%;有机质类型以Ⅱ1-Ⅱ2为主;82%样品镜质体反射率介于2.0%～44.0%,处于高-过成熟演化阶段。林西组暗色泥岩有机质丰度高、厚度大、分布范围广,是内蒙古东北部地区潜在烃源岩层位,具有较好的生气潜力。Through geological exploration,typical profile measuring,sampling and experimental analysis,we confirmed the Upper Permian Linxi Formation as the main horizon containing dark mudstone in Northeast Inner Mongolia.Research of organic petrology and organic geochemistry reveals that the TOC value of the dark mudstone is 0.45% -3.55%;averaging 1.09%;its organic matter type is II1-II2 in category;vitrinite reflectance of 82% samples is ranging in 2% -4%,and it falls into high to over-mature evolution stage.With the high organic abundance,large thickness and the wide distribution,the Linxi Formation in Northeast Inner Mongolia is potential in hydrocarbon source rocks,with high potential of gas generating.

关 键 词：上二叠统 林西组 烃源岩 有机地球化学 内蒙古 

分 类 号：P534.46[天文地球—古生物学与地层学] P593[天文地球—地质学]