藏北扎仁地区中侏罗统布曲组白云岩的沉积环境及意义  

Sedimentary Environment of Dolomite and its Significance of Buqu Formation Middle Jura Series in Zharen Region,North Tibet

作　　者：贺永忠 李祥坤[2] 刘建清[3] 岳龙 朱勋 熊兴国 吴滔 朱鸿毅 

机构地区：[1]贵州省地质调查院,贵州贵阳550005 [2]贵州省地矿局115地质队,贵州清镇551400 [3]成都地质矿产研究所,四川成都610081

出　　处：《贵州地质》2008年第1期41-45,58,共6页Guizhou Geology

基　　金：<青藏高原油气资源战略选区调查与评价>项目:羌塘盆地扎仁区块1:5万石油地质构造详查专题。科油[2006]02号

摘　　要：本文通过对西藏南羌塘扎仁地区中侏罗统布曲组白云岩特征描述和岩石分析,并对其产出层位沉积环境作出分析判断,认为中侏罗世布曲组沉积中期(J2b2)时,该区在碾砸-勾柔噢扎尔错-晓嘎晓那-巴格底加日一带分为相区,北部为局限碳酸盐台地相区,南部为开阔碳酸盐台地相区。北部相区中分布的白云岩中含干沥青,油古场的存在为羌塘盆地寻找油气具有一定的指导意义。In this article, by the description of dolomite and the rock analyses of Buqu formation Middle Jura series in Zharen region, Qiangtang, Tibet, and it made judgment of the sedimentary environment of the occurrence position, it thinks that in the middle sediment of Buqu formation Middle Jura series, this region was divided into two belts in the Niza--Gourouaozhaereuo-Xiaogaxiaona-Bagedijiari area, the north was restricted carbonate plateau belt, the south was the open carbonate plateau belt. The dolomite in the north belt was dry pitch, the exits of the ancient gas fried has some guiding significance for seeking oil gas in Qaingtang basin.

关 键 词：寻找油气 古油场 沉积环境 白云岩 扎仁 西藏 

分 类 号：P534.52[天文地球—古生物学与地层学]