摘要
根据粘土矿物演化特征 ,首次提出了由蒙皂石 +伊 /蒙混层矿物 +伊利石端元 (S/I端元 )、蒙皂石 +绿 /蒙混层矿物 +绿泥石端元 (S/C端元 )、高岭石端元 (K端元 )这三个端元构成的粘土矿物三端元分析方法 ;应用粘土矿物三端元分析法查明了库车前陆盆地下侏罗统阳霞组和白垩系巴西盖组物源区粘土矿物组合特征 ,分析了下侏罗统阳霞组处于不同压力体系下的粘土矿物演化特征 ;发现静水压力体系下高岭石、绿泥石相对含量的增高、伊 /蒙混层矿物 +伊利石相对含量降低和异常高压体系下高岭石相对含量的降低、伊 /蒙混层矿物 +伊利石相对含量增高的粘土矿物演化特征。
Based on the characteristics of clay mineral evolution, a 3 unit analysis method is first proposed for analyzing clay minerals formed by the units of smectite+mixed layer minerals of illite/montmorillonite+illite unit (S/I unit), smectite+mixed layer minerals of chlorite/montmorillonite+chrorite unit (S/C unit)and kaolinic unit (Kunit). The 3 unit analytical method is used to explore the clay mineral assemblage characteristics in lower Jurassic Yangxia formation of Kuche foreland facies basin and in Brazilian cap formation of Cretaceous system, evolutional characteristics of clay minerals at different pressure systems in Yangxia formation of the lower Jurasic system are analyzed. It is found out that under the hydrostatic pressure system the clay mineral evolution characteristics include the raising of relative contents of kaolinite and chlonite, the decrease of relative contents of illite /montmorillonite mixed layer mineral+illinite and under abnormal high pressure system, the decrease of relative content of kaolinite, increase of the relative contents of mixed layer minerals of illinite/montmorillonite+the relative content of illinite.
出处
《江汉石油学院学报》
CSCD
北大核心
2004年第2期26-28,共3页
Journal of Jianghan Petroleum Institute
基金
"九五"国家重点科技攻关项目 ( 99 111 0 1 0 4 0 1)
关键词
粘土矿物
分析方法
成岩作用
应用
clay mineral
analytical method
genesis
application
