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.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
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)
关键词
埋藏白云石化
白云岩
成因
飞仙关组
川东北地区
burial dolomitization
dolomite
origin
Feixianguan Formation
northeastern Sichuan Basin
