西藏措勤县日阿铜矿床成矿地质条件及成矿过程浅析

Metallogenic Conditions and Mineralization Process of Ri'a Copper Deposit in Coqen County,Tibet

西藏自治区是我国未来重要的铜矿基地,有着重要的战略地位。日阿铜矿床位于冈底斯山脉北缘,地处隆格尔-工布江达断隆带,地质工作程度较低。笔者通过研究矿床的地质特征,从地层、构造、岩浆岩、成岩成矿时代等方面分析了矿床形成的地质条件,根据该矿床经历的地质作用、矿石构造以及矿物组合特征,认为矿床为矽卡岩型铜矿,主要成矿作用经历了岩浆热液成矿期和表生风化期,其中岩浆热液成矿期为主要成矿期,可进一步分为矽卡岩阶段,氧化物阶段,石英硫化物阶段等,并在此基础上总结出日阿矽卡岩型铜矿床的成矿模式。

Tibet Autonomous Region is an important copper production base in China in the future and has an impor- tant strategic position. Ri a copper deposit located in Northern margin of the Gangdisi Mountains and Lunggar- gongbo＇gyamda uplift belt is a low level of deposit in geological work. By studying the ore deposit geological condi- tions and features, authors anMyze geological conditions of deposit formation from the formation, structure, igne- ous rocks and so on and according to the deposit experienced geological function, ore constructed, mineral assem- blages, authors think the deposit is a Skarn-type copper deposit and the deposit formation experiences magmatic hy- drothermal stage and supergene stage, and magmatic hydrothermal stage is the main mineralization stage, further dividing into skarn stage, the oxide phase, quartz sulfide stage, and establishing Riga skarn copper deposit mineral- ization model on this study.