云南德泽下寒武统黑色岩系中Ni-Mo-V-PGE多金属矿化

云南省德泽地区筇竹寺组黑色岩系位于扬子陆块南缘下寒武统黑色页岩分布带的西端, 不同于该带中段湘黔地区的牛蹄塘组, 它发育有两个多金属富集层位, 其中, 石岩头段黑色碳质粉砂岩底部富集V、U、Ag和Pd, 玉案山段黑色页岩底部富集Mo、Ni、Pt和Pd.筇竹寺组黑色岩系整体上富集V-Ni-Mo-U-Ag-Pt-Pd, 而牛蹄塘组黑色岩系则富Ni-Zn-Co-Pt-Pd-Ag-Pb, 但它们都经历了相似的缺氧环境, 且具有相同的PGE和Ni、Mo富集机制, 是一种重要的非传统矿产资源类型. 

Ni-Mo-V-PGE Mineralization in the Lower Cambrian Black Shale Series from the Deze Area, Yunnan Province, Southwest China

The Qiongzhusi Formation black shale series of the Deze area are located in the western part of the Lower Cambrian black shale zone widely distributed along the southern margin of the Yangtze block,SW China. Different from the Niutitang Formation of black shale in Hunan and Guizhou provinces,the Qiongzhusi Formation contains two distinct metal-rich layers,with V,U,Ag and Pd enriched in the bottom of black carbonaceous siltstones of the lower Shiyantou Section,and Mo,Ni,Pt and Pd in the bottom of black shales of the Yu'anshan Section. In general,the Qiongzhusi Formation is characterized by the enrichment of V-Ni-Mo-U-Ag-Pt-Pd assemblages,whereas the Niutitang Formation is featured with the enrichment of Ni-Zn-Co-Pt-Pd-Ag-Pb association. However,both areas share similar depositional and diagenetic environment (oxegen-reduction) and have similar mechanism for Ni-Mo-PGE mineralization. Ni-Mo-V-PGE mineralization in black shale series is an unconventional type of mineral resources,and it is of great importance to the deposit study and mineral exploitation.