新康猫金矿床热液矿物微量元素地球化学特征及成因探讨

通过对与新康猫金矿金成矿有关的石英、方解石和黄铁矿的微量元素、稀土元素等地球化学特征的测试分析发现:这些数据较好地反映了该矿床的成矿流体来源和成因信息证实其为受层位和构造复合控制的微细浸染型金矿床,矿体赋存于北北东向与北北西向构造复合部位,在垂向上构造对成矿具有分带控制的特征。石英形成于氧化环境下石英中Au与亲岩浆元素Cr,Co,Rb,Zr,Hf,Th,V,W,O正相关,说明有较多深部流体或岩浆流体参与。黄铁矿中Au,As含量很高,其稀土元素配分模式与岩石有一定的相似性,而石英与方解石的则与岩石的有较大的差异,显示形成的流体是有深部流体的参与。

THE GEOCHEMICAL CHARACTERS AND GENESIS OF TRACE-ELEMENTS IN EPITHERMAL MINERALS FROM THE XIN KANGMAO GOLD DEPOSIT

Xin Kangmao gold deposit is a kind of superfine impregnation gold deposit controlled by both stratum and structures. The geochemical characters of trace elements and rare earth elements in quartz,calcite and pyrite related to gold deposit reflect the origin of mineral solution and the information of its genesis.Quartz formed in relative oxygenation environment,but stratum was not the main ore-forming solution source.Solution from the deep crust and from magma is also involved in the formation of gold deposit. Disseminated pyrite in the stratum,derived from the deep and magma ore solution,is formed at deoxidizing environment.