西藏春哲地区铁多金属矿成矿规律及远景预测

Metallogenic Regularity and Prospective Prediction of Iron Polymetallic Deposits in Chunzhe Area,Tibet

通过对成矿地质背景、地球化学特征、矿化特征的分析研究,总结了西藏春哲地区铁多金属矿的成矿规律,认为研究区主要矿床类型为矽卡岩型铁铜多金属矿、中低温构造热液型铅锌银矿,还可能存在斑岩—矽卡岩型钨钼矿和热水沉积型铅锌矿,成矿受特定的地层、构造、侵入岩控制,成矿时代主要为喜山期。依据成矿规律和找矿标志,建立了矽卡岩型和构造热液型矿床的找矿模型,并开展了成矿预测,圈定出9个找矿远景区。

Based on the analysis of the regional geological background,geochemistry characteristics,and typical deposits,this paper summarizes the metallogenic regularity of iron polymetallic deposit of Chunzhe,Tebet.The paper reveals that the deposit types mainly consist of the skarn Fe-Cu polymetallic deposit and the fracture-controlling hydrothermal Pb-Zn deposit,and there may also exist porphyry-skarn W-Mo deposit and hot-water sedimentary Pb-Zn deposit.The mineralization was formed in Himalayan Period and controlled by specific strata,tectonics and intrusive rocks.According to the metallogenic regularity and prospecting indicators,the paper establishes a prospecting model of skarn type deposit and fracture-controlling hydrothermal type deposit,which is applied for the prospective prediction with nine prospecting areas which are finally located.