云南雪龙山韧性剪切带研究新进展

雪龙山变质带，变质级别达高绿片岩相到低角闪岩相，在区域上为一条韧性剪切带，具逆冲兼左行走滑的特点。左行走滑位移量达9.4km。流体包裹体研究表明，在韧性剪切阶段，属降温的退变质作用；构造地球化学研究表明，韧性剪切作用对元素的迁移和富集有较大影响，因此，对构造变形带中元素迁移富集规律的研究，对于探明矿床形成和指导找矿具有重要的理论意义和实际意义。

Advances in the research on the Xuelongshan ductile shear zone in Yunnan

The metamorphic facies of the Xuelongshan metamorphic zone in Yunnan vary from the higher green schist facies to lower amphibolite facies. Regionally the metamorphic zone is considered to be a ductile shear zone characteristic of thrusting and left-lateral slipping with a displacement distance of 94 km. The decrease in temperatures and pressures during the ductie shearing as indicated by fluid inclusion data suggests a retrogressive metamorphism of the ductile shear zone. The structural- geochemical approaches also show that the ductile shearing might have exerted an important effect on the migration and enrichment of various elements. Therefore the studies of migration and enrichment of the elements in the tectonically deformed zones are definitely of theoretical and practical values to the prospecting and exploration of ore deposits in the study area.