Characteristics of gold minerals and the occurrence of gold have been determined in Yinwagou Gold Deposit ,on the basis of systematic laboratory study ,such as electron microscope observation ,multi-element analysis ,e-lectronic microprobe energy spectrum analysis , electronic microprobe wavelength spectrum analysis , mineral phase a-nalysis .The result shows the gold ores mainly have three different mineralogical types ,that is low sulphide altered rock type gold ore,low sulphide cataclastic quartz-vein type gold ore and low sulphide ankerite -albite-quartz-vein type gold ore ,and Au is the only one industrially valuable element;the metallic mineral content in the ore is low and they are mainly limonite ,hematite and pyrite;non-metallic minerals are mainly quartz ,followed by sericite ,carbonate min-erals,feldspar,chlorite and kaolinite; gold minerals are native gold,and the average fineness of native gold is 975;The main type of dissemination is fissure gold ,followed by inclusion gold ,few in the form of the intergranular gold;grain size of native gold is dominated by fine visible gold ,followed by microgranular gold .Native gold is primarily visi-ble gold,followed by microscopic gold .%为了查清阴洼沟金矿床矿石特征及金的赋存状态,采用电子显微镜、多元素分析、电子探针能谱分析、电子探针波谱分析、物相分析等技术方法,对阴洼沟金矿床的金矿石、金矿物进行了系统的研究.研究结果表明:金矿石工艺类型主要有少硫化物蚀变岩型金矿石、少硫化物碎裂石英脉型金矿石和少硫化物铁白云石-钠长石-石英脉型3种,且有工业价值的元素只有Au;矿石中金属矿物含量较低,主要是褐铁矿、赤铁矿及黄铁矿,非金属矿物主要是石英,其次是绢云母、碳酸盐矿物、长石、绿泥石及高岭石;金矿物为自然金,金成色平均为975;金的嵌布类型以裂隙金为主,其次为包裹金,粒间金含量较少;自然金以细粒级明金为主,其次是微粒金.
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