Geochemical Characteristics of Pb-Zn-Cu Elements in Elashan Area, Qinghai Province and Metallogenic Prediction
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摘要: 在1:50 000水系沉积物测量的基础上,分析了鄂拉山地区Pb、Zn、Cu元素的地球化学特征。通过对成矿元素的分布特征、相关性及因子分析,认为寻找铅锌铜多金属矿床潜力较大;根据异常特征及成矿地质条件,在早元古代达肯达坂(岩)群、奥陶系滩间山群和石炭系中吾农山群大干沟组背景下,寻找与泥盆-侏罗系岩体相关的铅锌多金属热液型和矽卡岩型矿床潜力较大,进而划分出5个成矿远景区,即沙柳河地区钨铜锌铅多金属成矿远景区、达纳亥公卡铅锌多金属成矿远景区、尕录北铅锌多金属成矿远景区、扎龙加当铅锌银金多金属成矿远景区和尼哈鄂如岗铅锌银钼成矿远景区。Abstract: Based on the stream sediment survey at scale 1:50 000 in Elashan area, the geochemical characteristics of Pb-Zn-Cu elements in this region have been analyzed. After analyzing the distribution characteristics of ore-forming elements and carrying out the correlation and factor analysis, the results show that it hasa potential to prospect the Pb-Zn-Cu polymetallic deposit in this region. According to the abnormal characteristics and the geological conditions of mineralization, it has a great potential to prospect Pb-Zn-Cu polymetallic epithermal and skarn deposits associated with Devonianto Jurassic intermediate-felsic rocks under the geological setting of Proterozoic Dakendaban (rock) Group, Ordovician Tanjianshan Group and Dagangou Formation in Carboniferous Zhongwunongshan Group. And then, five metallogenic prospect areas have been defined, that is, Shaliuhe W-Cu-Pb-Zn polymetallic mineralization prospective area, Danahaigongka and NorthGalu Pb-Zn polymetallic mineralization prospective areas, ZhalongjiadangPb-Zn-Ag-Au polymetallic mineralization prospective area and Nihaerrugang Pb-Zn-Ag-Mo mineralization prospective area.
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