云南地质(断裂)构造骨架新认识

云南最主要的骨架断裂构造是德钦-阿墨江西部大洋向东部扬子大陆及其增生带俯冲的深大断裂（F5），其西部为澜沧．西盟微板块，崇山微板块，高黎贡山微板块。从华力西运动开始至喜马拉雅运动期间，从5SW向NNE方向漂移，逐一拼贴而显今日之貌。F5深大断裂两侧，矿产形成地质环境、形成机理差异大，找矿勘查的思路和侧重点也不尽相同。卫片图上看，碧罗雪山-沦源（西）深断裂（F2）经保山市东侧往南直下，而F2断裂与南澜沧江断裂（F4）极不协调，具有前者切错后者的迹象。本文把以往认为沿澜沧江是一条完整的深大断裂划分为碧罗雪山-沧源（西）深大断裂（F2）和南澜沧江深大断裂（F4）两部分。

THE NEW KNOWLEDGE OF GEOLOGICAL (FAULT) TECTONIC FRAMEWORK OF YUNNAN

The Deqin-Amojiang fault F_5 is a deep fault,the west oceanic crust thrust towards the east Yangzi continental crust and its accreting zone.There are Lancang-Ximeng microplate,Chongshan microplate and Gaoli-gongshan microplate west of F_5,which shifted from SSW to NNE in the period from Variscan to Himalayan,connected one by one,and then appeared in the present forms.The geological environment of metallo-genesis is very different in both sides of Deqin-Amojiang deep fault,so are the formation mechanism,exploration idea and focus.According to the satellite image,the Biluoxueshan-Cangyuan(west) deep fault(F_2)extends southwards by the east side of Baoshan.The fault F_2 is very discordant with the south Lancangjiang fault F_4,in appearence of the latter cut by the former.Therefore,we divide the fault,which was regarded as a unified deep fault along the Lancangjiang River in the past time,into the Biluoxueshan-Cangyuan(west) deep fault F_2 and the south Lancangjiang deep fault F_4.