准噶尔盆地南缘上二叠统芦草沟组碳质页岩岩矿特征及页岩气意义  

The Petrologic Characteristics of Carbonaceous Shale and Its Significance of Shale Gas,Lucaogou Formation,Southern Junggar Basin

作　　者：白洪海[1] 周继兵[1] 吴超[1] 王正和[2] 

机构地区：[1]新疆维吾尔自治区地质矿产勘查开发局第九地质大队,乌鲁木齐830009 [2]中国地质调查局成都地质调查中心,成都610081

出　　处：《矿物岩石地球化学通报》2016年第6期1310-1317,共8页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：新疆维吾尔自治区地勘基金(N13-4-XJ02)

摘　　要：准噶尔盆地南缘上二叠统芦草沟组具页岩气勘探潜力。为了详细了解与评价芦草沟组页岩气地质特征,对其中的碳质页岩岩矿特征进行了较为全面的系统分析研究,结果表明:(1)芦草沟组上、中、下三段碳质页岩中的脆性矿物百分含量均值均超过50%,但以中段最高,其次为下段,上段则显著低于中、下段;(2)各段碳质页岩中的脆性矿物均以石英+长石为主,且石英+长石含量与总的脆性矿物含量变化规律具有相似性,即中段碳质页岩中石英+长石含量最高,其次为下段,而上段明显偏低;(3)由下段往上至上段,碳质页岩中碳酸盐岩矿物含量渐次减少;(4)在上、中、下三段中,上段碳质页岩中的黏土矿物含量远高于中、下段;各段碳质页岩中的黏土矿物组分皆以伊利石及伊/蒙间层为主;(5)在准噶尔盆地南缘博格达山北缘西段,由西往东至阜康,碳质页岩中的脆性矿物含量大致呈现为减小的趋势。In the margin of southern Junggar basin,there is a potential of shale gas with the upper Permian Lucaogou For-mation.For a detailed understanding and evaluation with the shale gas geological characteristics of Lucaogou Formation, the petrologic characteristics of the carbonaceous shale was researched,and the results show that：（1）in Lucaogou Forma-tion,the mean value of the brittle mineral percentages of the upper member,the middle member and the lower member are all more than 50%,but it is the highest in the middle member,and it is second in the lower member.At the same time, in the lower member,the mean value of the brittle mineral percentages is significantly lower than the upper and middle members;（2）the main brittle mineral in each member are quartz＋feldspar,and there is a same change rule between the quartz＋feldspar content and the total brittle mineral,that is：The quartz＋feldspar content is the highest in the middle member,followed with the lower member,and it is obviously low in the upper member;（3）from the lower member to the upper member,the content of carbonate in the carbonaceous shale are gradually reduced;（4）the clay mineral content of the carbonaceous shale of the upper member is far higher than the lower and middle members.And the clay mineral in each member are mainly constituted with illite and illite/Mongolia interlayer;（5 ）in the northern margin of the western part of the Bogda Mountain,south Junggar Basin,the brittle mineral content of the carbonaceous shale generally present as a decreasing trend from west to east to Fu Kang.

关 键 词：碳质页岩 岩矿特征 页岩气 芦草沟组 准南 

分 类 号：P618.13[天文地球—矿床学]