陕西省安康某地区铌矿地质地球化学特征

Geological and geochemical characteristics of the Nb deposit in some area of Ankang,Shannxi

安康地区位于南秦岭中段,复杂的地质环境为铌成矿提供了有利的条件。区内地球化学特征显示,铌在寒武系和碱性岩中为强富集,含矿岩性为黑色炭质板岩、片理化泥质粉砂质板岩、千枚岩和碱性粗面斑岩;矿化类型有原生矿化岩型和碱性长石岩型两种,均属低品位矿化,但碱性长石岩型矿化规模大,找矿前景乐观。

Ankang area locates in the middle section of South Qinling,where the complicated geological environment has offered a favorable condition for the mineralization of Nb deposit.The geochemical characteristics of this area has shown a strong Nb enrichment in Cambrian System and alkali rocks as well as the ore-bearing lithology of black carbonaceous slate,schistosity argillite and silty slate,phyllite and alkali trachyte porphyry;the mineralization types includes primary mineralization and alkali feldspar rock types,both of which are low grade mineralization,while the alkali feldspar rock type has a large scale mineralization with the foreground of prospecting being optimistic.