【摘要】 通过区域地质调查和伊利石的结晶度指数、晶格参数 (b0 )的测定 ,揭示川西北壤塘地区三叠纪西康群遭受了区域极低级变质作用 ,进一步讨论区域极低级变质作用与构造变形的关系 ,并指出区域极低级变质作用是成岩 -埋藏变质作用 (造山前 )和同造山变质作用的综合结果。更多还原

【Abstract】 Regional geological research and analysis of illite crystallinity,b 0 parameters indicated that Triassic Xikang Group underwent a regional very low grade metamorphism in Tangtang area, northwest Sichuan. Relation between regional very low grade metamorphism and regional deformation discussed in the paper. Regional very low grade metamorphism resulted from the combination of early diagenesis burial metamorphism(pre orogeny)and late syn orogeny metamorphism.更多还原