柴达木盆地尖顶山锶矿地质地球化学特征研究

Study on Geological and Geochemical Characteristics of Jiandingshan Strontium Mine in Qaidam Basin

尖顶山锶矿是柴达木盆地内大型的天青石矿床,通过对矿区进行野外考察和取样,对尖顶山锶矿矿石进行了矿物学、元素地球化学以及锶同位素特征的研究。在对尖顶山矿区区域地质构造特征分析对比的基础上,结合尖顶山天青石矿区的Google Earth图像的遥感地质解译,发现尖顶山地区的天青石矿层赋存于第四系七个泉组,而不是第三系的狮子沟组。并且前人所划分的N2S2-1和N2S2-2地层不应该属于上新世的狮子沟组,而应划入第四系七个泉组。

Jiandingshan strontium mine is a large celestite deposit in Qaidam Basin. Through field investi- gation and sampling in the mining area of the basin, celestite deposits in many aspects of research has been made, such as mineral components, element geochemistry and Sr isotope geochemistry. On the basis of the regional geologic structure analysis and remote sensing geological interpretation of GE image of Ji- andingshan celestite mining area,it has been found that the Jiandingshan celestite deposit should belong to Q1 series rather than N2S series. In addition,the former N2S2-1 and N2S2-2ore-forming layer should be attributed to Q1 rather than N2S.