摘要
在川东北地区下三叠统飞仙关组沉积相模式研究成果的基础上,详细研究了区内鲕粒白云岩、具残余鲕粒结构的粗粉晶-细晶白云岩、泥微晶白云岩、藻纹层白云岩、粗粉晶-细晶白云岩的岩石学特征,并结合碳氧同位素、微量元素、流体包裹体3种地球化学特征资料认为:鲕粒白云岩和具残余结晶鲕粒白云岩为混合水白云石化作用形成;泥微晶白云岩和藻纹层白云岩为回流渗透白云石化作用形成;粗粉晶-细晶白云岩为埋藏白云岩化作用形成。
Based on the research of sedimentary facies model of Feixianguan formation of the Lower Triassic Series in northeast Siehuan this paper mainly deals with the petrological characteristics of oolitic dolomite, coarse crystal powder dolomite-fine crystal dolomite with residual oolitic texture, micritic dolomite, alga-laminated dolomite and coarse crystal powder-fine crystal dolomite. Combined with data of C, O isotopic, microelement and fluid inclusion researches the author thinks that oolitic dolomite, coarse crystal powder dolomite-fine crystal dolomite with residual oolitic texture are the result of mixed water do- lomitization, micritic dolomite, alga-laminated dolomite the result of seepage reflux dolomitization and coarse crystal powder dolomite-fine crystal dolomite the result of burial dolomitization.
出处
《地质找矿论丛》
CAS
CSCD
2010年第3期241-245,共5页
Contributions to Geology and Mineral Resources Research
关键词
飞仙关组
白云岩
成因分析
岩石学特征
地球化学特征
川东北地区
Feixianguan formation
dolomite
genetic analysis
petrological character
geochemical character
the northeast Sichuan
