青海牧羊沟金矿载金矿物特征与金的赋存状态（已录用，稿件编号20161211001）

牧羊沟金矿为东昆仑造山带一大型金矿,隶属于青海省同德县。牧羊沟金矿矿石分为两类：原生金矿石和氧化金矿石。原生矿石中主要金属矿物为黄铁矿、毒砂、菱铁矿、辉锑矿及闪锌矿等,脉石矿物主要为石英、白云石和方解石等。氧化矿石中金属矿物主要为黄铁矿、褐铁矿、毒砂等,脉石矿物主要为石英、绢云母、碳酸盐等。矿石中有用元素为Au,伴生元素为S和As,而其它元素含量较低。牧羊沟金矿主要的载金矿物为黄铁矿、毒砂和褐铁矿,其次为辉锑矿、闪锌矿等。矿石中金主要与褐铁矿、黄铁矿和毒砂等金属硫化物关系密切,石英、绢云母等脉石矿物中不含金。各载金矿物中可见金存在四种嵌布形式：包裹金为主,裂隙金、晶隙金和吸附金次之。

Charcteristics of gold-bearing minerals and modes of occurrence of gold in the Muyanggou gold deposit, Qinghai Province

The Muyanggou gold deposit is a large gold mine in the Eastern Kunlun orogenic belt, which is affiliated with Tongde County of in Qinghai Province. The Muyanggou gold ores of Muyanggou deposit ore is are divided into two categories, :primary ore and oxidized ore. The main metal minerals in the primary ore are pyritePyrite, arsenopyrite, siderite, stibnite and sphalerite are recognized as the main metal minerals of primary ores, while the main gangue minerals are quartz, dolomite and calcite. Meanwhile,The main metal minerals in the oxidized ore are pyrite, limonite and arsenopyrite are regarded as the main metal minerals of oxidized ores, while the main gangue minerals are quartz, sericite and carbonate. The results show that Au gold is the useful element in the ore with S and As as the associated element, as well as other elements with low content. Pyrite, arsenopyrite and limonite are considered as the main most important gold gold-bearing minerals in Muyanggou goldthis deposit, followed by stibnite, sphalerite. Furthermore, Au gold is closely coexistent with to limonite, -pyrite, -arsenopyrite and other metal sulfides, while yet gold has not been found does not exist in quartz, sericite and other gangue minerals. There are four types of disseminated forms of the visible gold, and :the main type of dissemination is inclusive gold is the main type of dissemination, followed by fissure-filled gold, crystal interface-gold and adsorbing gold.