甘肃省阳山金矿田金的赋存状态和金矿物特征  

Gold occurrence of the Yangshan gold ore field and gold minerals' characteristics,Gansu Province

作　　者：吴春俊[1,2] 王金荣[1] 喻光明[2] 吴继承[1] 贾志磊[1] 

机构地区：[1]兰州大学资源环境学院,甘肃兰州73000 [2]武警黄金第十二支队,四川成都610036

出　　处：《矿产与地质》2008年第4期353-356,共4页Mineral Resources and Geology

摘　　要：甘肃阳山金矿田属于类卡林型金矿床,金矿化类型主要有蚀变千枚岩、蚀变斜长花岗斑岩、蚀变砂岩、蚀变灰岩四种。金多呈独立金矿物形式出现,少许呈分散状,矿石中金矿物以自然金为主,其次是银金矿。金矿物以包体金、裂隙金、粒间金等形式嵌布于毒砂、黄铁矿、辉锑矿、粘土矿物等主要载金矿物中,且毒砂、黄铁矿、辉锑矿较其它金属硫化物中占优势。金矿物形态各样,粒度以微细粒为主。金矿物特征反映出本区金矿床的成矿物质主要来源于变质岩、岩浆岩和地幔,成矿作用与印支晚期中酸性侵入岩有关。这与地质地球化学研究所获得的矿床成因认识相一致。The Yangshan gold deposit is a para-carlin type gold deposit with the major gold mineralized in four altered types which include altered phyllite, altered plagioclase granite porphyry, altered sandstone and altered limestone. The gold often occurred as independent gold mineral, while a few gold occurred in dispersing state. Native gold is the main gold mineral in ores, and electrum is the second gold mineral. Gold minerals, in patterns of inclusion gold, fissure gold, intergranular gold etc. , layed and distributed in major Auloading minerals including arsenopyrite, pyrite, stibnite and clay mineral etc., of which arsenopyrite,pyrite, stibnite have advantages for loading gold. Gold minerals occurred in diversity shapes with the major granularity being micro fine. The characteristics of gold minerals showed that the ore-forming matters of the gold deposit in this area is mainly from metamorphic rocks, magmatic rocks and mantle, and the mineralization is related to the intermediate-acid intrusive rocks of the Late Indo-Chinese Epoch, which is accordance with the genesis knowledge obtained from geological and geochemical research.

关 键 词：金矿床 矿物特征 赋存状态 阳山 甘肃 

分 类 号：P618.51[天文地球—矿床学]