西昆仑上其汗地区块状硫化物矿床的区域成矿条件

Discussion on the Regional Metallogenetic Condition about the Shangqihan Massive Sulfide Deposit in West Kunlun

块状硫化物矿床是西昆仑地区重要的铜矿床类型之一。为了探明西昆仑地区该类型矿床的区域成矿条件和有关成矿作用过程,本文根据翔实的野外资料和系统的采样分析,通过对上其汗典型块状硫化物矿床有关岩矿标本和样品的光、薄片研究与硅酸盐全分析,综合前人资料分析指出,上其汗地区是苏巴什 上其汗加里东期岛弧带的组成部分,大量火山岩的形成为块状硫化物矿床提供了金属元素矿源;深成钙碱性侵入岩为硫化物矿床的形成提供了热源。因此,该区具有中—大型块状硫化物型层状铜多金属矿的找矿前景。

Massive sulfide ore deposit is a very important copper deposit type in west of Kunlun. In order to probe into its regional metallogenetic condition and process. the authors made detailed field inspecting and collected many samples. Based on the abundant information from rockmineral identifying, PbS isotope measuring data, main element content analysis of ores and adjoining rock in the Shangqihan deposit, We regarded that Shangqihan is one part of ancient SubashiShangqihan island, contained spilitekeratophyre rocks,which supplied metal element for massive sulfide deposit. The region have great exploitation prospects to find some big scale massive sulfide type of layered copper polymetallic deposits. 