青海都兰县科日南地区1∶2.5万地球化学异常特征及成矿预测

Anomaly characteristics of 1∶25 000 geochemical survey andmetallogenic prediction in Kerinan area,Dulan County of Qinghai

通过对科日南地区元素离散富集、组合和分布特征及元素之间相关性等的分析,结合地质背景、成矿属性及已有成矿事实等,总结1∶2.5万地球化学测量工作在科日南地区的应用成果。划分了4个找矿远景区:扎木特北—益克郭勒地区具有形成斑岩型铜钼矿条件;特立耿南地区可寻找热液脉型钨钼矿;夏日撒拉地区可寻找热液脉型钨钼矿及矽卡岩型银多金属矿;伊和让贵—达瓦特地区可寻找岩浆熔离型铜镍矿及构造蚀变岩型金多金属矿。为该区成矿预测及下一步地质找矿工作的部署提供了可靠的地球化学依据。

On the basis of the analysis of the discrete enrichment,combination and distribution characteristics of elements and the correlation among elements in this area,and the geological background,metallogenic specificities and distribution feature of mineral resources,etc,the application result of 1∶25000 geochemical survey is summarized in Kerinan area.Four exploration perspective areas are divided as follows.Zamutebei-Yikegol area has the metallogenic condition to form porphyry-type copper-molybdenum deposit.In Trigengnan area there is the potential to explore for hydrothermal vein-type tungsten-molybdenum deposit.In Xiarisala area there is the potential to explore for hydrothermal vein-type tungsten-molybdenum deposit and skarn-type silver polymetallic deposit.In Yiheranggui-Dawate area there is the potential to explore for magma liquation-type copper-nickel deposit and structural alteration rock-type gold polymetallic deposit.It provides a reliable geochemical basis for the mineralization prediction and the deployment of the next geological prospecting work in this area.