摘要
下扬子二叠系龙潭组是我国南方重要的含煤地层之一,广泛发育暗色页岩,为研究含煤地层中页岩黏土矿物与有机质的关系,对下扬子无为凹陷二叠系页岩样品进行X射线衍射(XRD)分析、总有机碳(TOC)分析和扫描电镜(SEM)分析。并对其黏土矿物含量与总有机碳含量做相关性分析。结果显示:该研究区页岩矿物组成以黏土矿物和石英为主。黏土矿物主要有伊利石、绿泥石,基本不含蒙脱石。扫描电镜显示:黏土矿物中孔隙发育,孔长1~3μm,孔宽数百纳米。有机质富集在溶蚀孔内。页岩的总有机碳含量与黏土矿物含量相关系数高,呈正相关。
In order to study the relationship between clay minerals and organic matter in the Lower Yangtze Wuwei sag,the Permian shale samples were analyzed by X-ray diffraction(XRD),total organic carbon(TOC)and scanning electron microscopy(SEM).The correlation between clay mineral content and total organic carbon content was analyzed.The results showed that the shale minerals in the study area were mainly composed of clay minerals and quartz.The clay minerals were mainly illite and chlorite,and basically did not contain montmorillonite.Scanning electron microscopy showed that the pores developed in the clay minerals,with pore lengths of 1~3μm and pored widths of hundreds of nanometers.Organic matter was enriched in the solution hole.The correlation coefficient between total organic carbon content and clay mineral content of shale was high and positive.
作者
许乃岑
张静
金凡
沈加林
李华玲
方朝刚
XU Nai-cen;ZHANG Jing;JIN Fan;SHEN Jia-lin;LI Hua-ling;FANG Chao-gang(Nanjing Center,China Geological Survey,Nanjing,Jiangsu 210016,China)
出处
《煤炭加工与综合利用》
CAS
2024年第11期95-98,104,共5页
Coal Processing & Comprehensive Utilization
基金
中国地质调查局地质调查项目“苏皖沿江凹陷带油气页岩气调查评价”(DD20221662)
自然科学基金联合基金重点支持项目“浙闽火山岩区蚀变岩帽叶腊石和明矾石矿物指针研究”(U234420091)。
