摘要:
根据2013年最新勘查成果、详细的地质编录,对西藏多龙铜金矿集区铁格龙南(荣那)铜(金银)矿床地质特征、矿床类型进行了初步研究,认为该矿床是斑岩-浅成低温热液成矿系统的产物,是典型的高硫型浅成低温热液矿床。矿床规模巨大,矿石中发育条带状、层纹状、皮壳状、致密块状明矾石、地开石,深部发育黄铁绢英岩化,黄铁矿的含量为3%~35%,矿石矿物由铜蓝、蓝辉铜矿、硫砷铜矿、斯硫铜矿、雅硫铜矿、久辉铜矿、斜方蓝辉铜矿、斑铜矿、黝铜矿、黄铜矿等组成。综合研究表明,推断浅部或外围发育独立的高硫型浅成低温热液型金矿,深部存在斑岩型铜(金银)矿体。该矿体的发现结束了西藏至今没有发现典型浅成低温热液矿床的历史,对区域找矿具有极其重要的指导意义。
Abstract:
According to the latest survey results and detailed geological records in 2013, as well as some preliminary study about geological features and deposit type of south Tiegelong (Rongna) copper (gold-silver) deposit which located in Duolong copper (gold) ore concentration area, we believe that it is a porphyry related epithermal deposit. It is a typical high sulfidation epithermal deposit. Rongna is a huge Cu(Au-Ag) deposit. Here exist various attitudes of alunite and dickite, that is, typical banded, layered, crusty or massive ones and etc. Phyllic exists in the deep. The content of pyrite is 3%to 35%. Ore minerals consist of covellite, digenite, enargite, spionkopite, yarrowit, djurleite, anilite, bornite, tetrahedrite, chalcopyrite and other components. Comprehensive study has shown that there is an inferred high sulfidation epithermal deposit in the superficial or peripheral, and a porphyry copper (gold and silver) orebody in the deep. The discovery of south Tiegelong is brilliant which actually is an epithermal deposit. It has brought us a new chapter to find epithermal deposit in Tibet which is never an imaginable type here ever. This is quite significant for regional prospecting because it can give extremely meaningful implications for surveies.
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