河南省西簧钒矿岩石地球化学特征及矿床成因

Rock geochemical characteristics and genesis of the Xihuang vanadium deposit in Henan Province

西簧钒矿位于南秦岭下寒武统水沟口组黑色岩系中,矿体规模较大,层位及品位比较稳定,矿石类型主要为炭质泥岩和含硅质泥岩,钒元素主要赋存于钒云母中。通过对岩石化学特征和稀土元素特征分析,认为该钒矿形成于大陆边缘向深海过渡的缺氧还原环境中,岩石物源来自海水、热液喷流及陆源碎屑,生物活动对钒矿的汇聚沉淀富集起了重要作用。综合地质及地球化学特征认为该钒矿属于生物—热水沉积成因。

The Xihuang vanadium deposit is located in the black rock series of the lower Cambrian Shuigoukou Formation in southern Qinling Mountain.The orebody is large,and the ore-bearing horizon and grade are relatively stable.The ore types are mainly carbonaceous mudstone and siliceous mudstone.The analysis of petro-geochemical elements and REE indicates that the vanadium deposit was formed in the hypoxic reductive environment from the continental margin to the deep sea,and the rock material source came from sea water,hydrothermal jet and terrigenous debris,with the biological activity playing an important role in the aggregation and precipitation of the vanadium deposit.Based on the comprehensive geological and geochemical characteristics,it is concluded that the vanadium deposit belongs to the biogenesis of hot water deposition,and that the vanadium deposit should be of biological and hydrothermal sedimentary origin.