青海省首个钒矿床的发现及意义

The discovery of the first vanadium deposit in Qinghai Province and its significance

钒矿属于青海省储量尚未查明、极度缺乏的矿种之一,近几年勘查发现的大干沟黑色岩系型钒矿改变了这一历史。黑色岩系岩性组合为炭质板岩+泥钙质板岩+硅质岩+灰岩;矿物相主要为云母类矿物之钒,占67.16%,其次为氧化铁矿物、高岭土等矿物之钒,占27.36%;矿石矿物组成为石英、粘土矿物、炭质、黄铁矿等,钒以粘土矿物、炭质吸附的形式存在。实验室流程试验通过采用加助浸剂90℃酸浸钒流程,在V2O 5品位为0.7%、0.3%时分别获得钒浸出率为88.84%、91.62%,开发利用前景佳。区域上黑色岩系分布广泛,初步圈出五大成矿潜力区,青海省钒矿勘查及研究工作有望进一步推进。

The vanadium resource belongs to one of the unidentified and extremely deficient mineral species in Qinghai Province.The Dagangou black rock series type vanadium ore deposit discovered in recent years has changed this history.The host rocks of the Dagangou deposit mainly include argillic,calc and carbonaceous slates,siliceous rocks and limestone.The main mineral is vanadium-bearing mica,accounting for 67.16%.Vanadium content in iron oxide mineral and kaolin is 27.36%.The ore minerals consist of quartz,clay mineral,carbonaceous,pyrite,etc.,with vanadium existent in the form of clay minerals and carbonaceous adsorption.Direct acid leaching process showed that,under the condition of leaching temperature of 90℃,the grade of V2O 5 was 0.7%and 0.3%,the leaching rate of vanadium was 88.84%and 91.62%,and hence the mining prospect is favorable.Black rocks are widely distributed in this region.Five metallogenic potential areas were preliminarily delineated,and the exploration and research on vanadium deposits in Qinghai Province are expected to be further promoted.