高岭石与片钠铝石成因联系的岩石学证据：以松辽盆地南部含片钠铝石砂岩为例  

Petrological Evidence for Transformation of Kaolinite to Dawsonite: Study Case of Dawsonite-bearing Sandstones from Changling Depression and Huazijing Terrace in Songliao Basin

作　　者：桂丽黎[1,2] 刘立[2] 于志超[1] 杨会东[3] 于淼[2] 吴凡[4] 李福来 

机构地区：[1]中国石油勘探开发研究院,提高采收率国家重点实验室,中国石油天然气集团公司盆地构造与油气成藏重点实验室,北京100083 [2]吉林大学地球科学学院,长春130061 [3]中国石油吉林油田公司勘探开发研究院,松原138001 [4]中联煤层气有限责任公司,北京100016 [5]中国石油大学,青岛266580

出　　处：《科学技术与工程》2015年第15期111-117,共7页Science Technology and Engineering

基　　金：吉林省科技发展计划重点项目(20110426);国家自然科学基金面上项目(41172091,40672074);中国石油天然气股份有限公司科技管理部项目(2011A-0207)资助

摘　　要：松辽盆地南部长岭凹陷乾安地区青山口组和华字井阶地孤店地区泉头组四段含片钠铝石砂岩中次生黏土矿物分布广泛,其中自生高岭石最为常见。以松辽盆地南部长岭凹陷-华字井阶地50余口钻井资料为基础,选择其中23个含片钠铝石砂岩样品进行普通薄片鉴定、扫描电镜观察、茜素红-S染色薄片观察和X-射线衍射分析。对片钠铝石与高岭石之间的关系进行了详细研究表明:在含片钠铝石砂岩中高岭石与片钠铝石的含量互为消长,并且在扫描电镜下可观察到高岭石溶解并被片钠铝石交代的现象。将这些岩石学的证据与国外热力学及地球化学实验成果总结归纳,进一步肯定了高岭石在碱性、富CO2流体环境中化学性质不稳定,并最终向片钠铝石转化。Clay minerals, especially for authigene kaolinite, is abundant in dawsonite-bearing sandstones trom Changling depression and Huazijing terrace, southern part of Songliao basin. The relationship between dawsonite and kaolinite has been investigated based on 50 sets of original petrographic data from Jilin Oil Field and the petro- logical characteristics analysis on a total of 23 core samples in Changling depression and Huazijing terrace. Kaolin- ite was replaced by dawsonite and there is a negative relationship between the contents of dawsonite and kaolinite. Combining with the thermodynamics and geochemical analysis, a conclusion was drew that dawsonite could be a product of transformation from kaolinite under abundant CO2 fluid conditions.

关 键 词：高岭石 片钠铝石 矿物转化 松辽盆地 

分 类 号：P581[天文地球—岩石学]