湘东北虎形山钨铍矿主要赋矿层位的重新划分与成矿物质来源的探讨

Study on redistribution of main ore-bearing strata and ore-forming material source in Huxingshan W-Be deposit of north-east Hunan

虎形山钨铍矿是近年来发现的特大型钨铍矿床。以往在对其钨铍矿体的主要赋矿层位划分上存在争义。通过与区域地层对比、地层成矿微量元素分析,确定矿区主要赋矿层位为寒武系下统的牛蹄塘组,从而推翻了多年来沿袭的震旦系陡山沱组。通过地层的重新认识,认为虎形山主要成矿物质来源于深部隐伏侵入岩浆岩,与地层的成矿专属性关系不大。另对虎形山钨矿成因作出了初步的判断,对今后在该地区的找矿具有一定指导意义。

Huxingshan W-Be deposit is a supergiant W-Be deposit which has just been discovered in recent years.In the past there were conflicts in distribution of main ore-bearing strata of the W-Be ore body.Through comparison with regional strata and strata mineralization trace element analysis,this paper verifies that in the mining area the main ore-bearing strata is Niutitang formation of lower Cambrian system instead of Doushantuo formation of Sinian system which was mistaken as the right strata for many years.After looking at the strata in a whole new way,the author believes that the main ore-forming material source in Huxingshan mining area is deep concealed intrusive magmatic rock,and it has nothing to do with metallogenic specialization of strata.Furthermore,the initial judgment of the genesis of Huxingshan tungsten deposit can be regarded as guidance to prospection in the area in the future.