西秦岭寨上特大型金矿床硫盐矿物特征及其成因意义

寨上金矿是卡林型金矿,主要金属矿物有黄铁矿、毒砂、辉锑矿、黝铜矿、自然金、黄铜矿、方铅矿和闪锌矿等。其中已发现的硫盐矿物有黝铜矿、锌黝铜矿、砷黝铜矿和硫锑铜矿等,黝铜矿也是载金矿物之一。硫盐矿物形成于构造热液期的多金属硫化物阶段,且硫盐矿物中的As、Sb、Sn和Hg等元素为原生晕中的前缘元素,硫盐矿物出现的部位指示了多期成矿作用叠加部位,硫盐矿物是富矿段的标志之一。As、Sb和Bi等元素活动及硫盐矿物的形成与Au的释放、搬运、沉淀、富集具有一定的内在联系。通过分析研究,指出硫盐矿物的找矿预测意义。

Mineralogy Characteristics and Genetic Significance of Tennantite-tetrahedrite from Zhaishang Gold Deposit in West Qinling

Zhaishang gold deposit is a Carlin types gold deposit.Mine metal mineral is pyrite,arsenopyite,stibnite,tetrahedrite,gold,copyrite,calena,sphalerite etc.Tetrahedrite,Zn-tetrahedrite tennantite serie,famatinite ete sul-fosalt minerals are fond.Tetrahedrite series minerals are one of main Au-bearing minerals.Sulfosalt minerals is sul-fosalt minerals formed in the stuctures-hydrothermal stage of multi-metallic sulphide,formed relatively late,and sulfate minerals in As,Sb,Sn,Hg and other elements in the front for the primery halo elements sulphosalts indicates the site appears more than superposition of mineralization,and thus,is a rich mine of mineral salt sulfur in para-graph one of the symbols.The relations among the activity of As,Sb and Bi etc.,the formation of sulfosalt minerals,and the release,transportation,deposition,enrichment of Au are discussed.The prospecting significances are given fi-nally.