新疆乌尔沟地区水系沉积物地球化学分区及其地质意义

Geochemical Subdivision of Stream Sediments in the Wuergou Area of Xinjiang and Its Geological Significance

基于新疆乌尔沟地区1∶5万水系沉积物资料,通过R型因子分析方法将研究区分为4个地球化学分区.结果表明,Ⅰ区是理想的Fe-Cu-Mn多金属找矿远景区,多期次的断裂为本区Fe,Mn的矿化提供了成矿通道;酸性岩脉为锰矿的形成提供了成矿热液,石炭系小热泉子组(C_(1)x)是Mn的天然矿源层.Ⅱ区中由动力变质变形作用形成的糜棱岩化变质砂岩与Fe的矿化关系最密切.Ⅲ区具有Fe-Cu-Au-Mn多金属矿的成矿前景.Ⅲ区发育韧性剪切带,在分区北西方向分布的系列辉长辉绿岩脉与Cu,Fe矿化点的分布一致,Ⅲ区的基性岩脉发育区是Cu-Fe矿的赋存区.Ⅳ区构造不发育,变质作用也不发育,也未发现可利用、有价值的矿点,找矿前景不好.

Based on the 150,000 stream sediment data in the Wuergou area of Xinjiang,the study area was divided into four geochemical divisions by R-type factor analysis method.The results show that ZoneⅠis an ideal prospective area for Fe-Cu-Mn polymetallic prospecting,and the multi-stage fractures provide mineralization channels for Fe and Mn mineralization in this area;while the acidic veins provide mineralization hydrothermal fluid for Mn ore formation,and the Carboniferous Little Hot Spring Subgroup(C_(1)x)is a natural source layer for Mn.The ductile shear zone is developed in ZoneⅢ,and the series of gabbro veins distributed in the north-west direction of the zone are consistent with the distribution of Cu and Fe mineralization,and the basal vein development area in ZoneⅢis the deposit area of Cu-Fe ore.The structure in ZoneⅣis tectonically undeveloped,nor is the metamorphism,and no valuable ore sites are found,so the prospecting prospect is not good.