四川盆地东北部飞仙关组白云岩成因分析  

An Analysis of the Feixianguan Formation Dolomite Origin in Northeastern Sichuan Basin

作　　者：彭军[1] 唐丹[1] 张桂瑞 李斌[1] 曹脊翔[1] 

机构地区：[1]西南石油大学资源与环境学院,四川成都601500 [2]国石油安全环保技术研究院,北京海淀100083

出　　处：《西南石油大学学报（自然科学版）》2012年第6期169-174,共6页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：四川省应用基础研究计划项目(2009JY0058)

摘　　要：在综述四川盆地东北部飞仙关组白云岩成因研究现状及存在问题的基础上,通过对研究区内主要由泥—微晶白云石和细—中晶白云石组成的岩石进行岩石学特征、有序度特征、阴极发光特征、同位素特征的研究,并对成岩流体温度、古盐度分析,认为:主要由泥—微晶白云石组成的岩石,如泥—微晶白云岩、藻纹层白云岩等,这类岩石的白云石化作用为准同生白云石化作用;而主要由细—中晶白云石组成的岩石,如晶粒白云岩、鲕粒白云岩、残余鲕粒白云岩等,这类岩石的白云石化作用是由埋藏白云石化作用引起。通过对锶同位素的聚集分布规律分析后认为,该埋藏白云石化作用发生在一个封闭体系中。On the basis of the overview of status and problems of Feixianguan Formation dolomitite origin in the Northeastern Sichuan Province,through the study of the micrite-microcrystalline dolomite and fine grain-microtek dolomite＇s petrological features,degree of order characteristics,cathodoluminescence characteristics,isotopic,and the diagenetic fluid temperature, paleosalinity：we think that dolomitization of rocks formed by the microcrystalline dolomite,such as micrite-microcrystalline dolomitite,algal-laminated dolomitite,etc.,are Quasi-syngenetic dolomitization,but dolomitization of rocks mainly composed of the fine grain-microtek dolomite,like crystalline dolomitite,oolitic dolomitite,etc.,are formed by burial dolomitization, The analysis of the distribution features of strontium isotope we come to the conclusion that the burial dolomitization occurred in a closed system.

关 键 词：埋藏白云石化 白云岩 成因 飞仙关组 川东北地区 

分 类 号：TE121[石油与天然气工程—油气勘探]