青海省同德地区1∶5万水系沉积物地球化学特征及找矿方向

Geochemical Characteristics and Ore Search Prospects of Tongde Stream Sediment Survey With A Scale of 1∶50000 in Qinghai Province

摘要:

在青海省同德湿润半湿润高寒山区景观区，通过粒级为10～+80目的１∶５万水系沉积物测量，探讨了该区水系沉积物中15种元素的地球化学场空间分布规律、共生组合和元素富集离散特征，初步分析并阐明了元素在不同地质体的分布情况；对异常元素组合特征进行了研究，并对工区圈定的综合异常按元素进行了排序，初步了解了工区的地球化学特征，指出了测区成矿潜力大的元素为Au，Hg，As，Sb，W，Mo，Ag；其中Au，Hg潜力最大；为今后找矿工作提供了地球化学基础资料；划分了4处成矿远景区，并确定了10处找矿靶区，为下一步的地质找矿工作指明了方向。

Abstract:

In Tongde moist and semi-humid cold highland scenic area of Qinghai province, through 1∶50000 stream sediment survey with a fraction of -10 mesh to +80 mesh, the geochemical spatial distribution and paragenetic assemblage together with element enrichment and discrete characteristics of 15 elements of stream sediment survey in this area are discussed, and the elements’ distribution in different geological body is preliminarily analyzed and illustrated. The characteristics of anomaly elements groups are researched, and the delineated comprehensive elements are sorted in order to preliminarily know the geochemical features in work district, pointing out these elements with deposit potential in the district such as Au, Hg, As, Sb, W, Mo, Ag. The highest potential elements among them are Au and Hg, which provide basic geochemical data for prospecting work in future. In addition, four metallogenic prospect areas are divided and ten target districts are determined, aiming to indicate direction for the next geological prospecting.