西南石油大学学报(自然科学版) ›› 2012, Vol. 34 ›› Issue (6): 169-174.

• 博导论评 • 上一篇    下一篇

四川盆地东北部飞仙关组白云岩成因分析

彭军1,唐丹1,张桂瑞2,李斌1,曹脊翔1   

  1. 1. 西南石油大学资源与环境学院,四川成都6015002. 中国石油安全环保技术研究院,北京海淀100083
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-12-01 发布日期:2012-12-01

An Analysis of the Feixianguan Formation Dolomite Origin inNortheastern Sichuan Basin

Peng Jun1, Tang Dan1, Zhang Guirui2, Li Bin1, Cao Jixiang1   

  1. 1. School of Resources and Environment,Southwset Petroleum University,Chengdu,Sichuan 610500,China2. Chian Petroleum Safety and Environment Protection Technology Research Institute,Haidian,Beijing 100083,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-12-01 Published:2012-12-01

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。

关键词: 埋藏白云石化, 白云岩, 成因, 飞仙关组, 川东北地区

Abstract: 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.

Key words: burial dolomitization, dolomite, origin, Feixianguan Formation, northeastern Sichuan Basin