甘肃加甘滩金矿床金的赋存状态研究  

Study on the Occurrence of Native Gold in the Jiagantan Gold Deposit,Gansu Province

作　　者：田向盛[1] 第鹏飞[2,3] 刘东晓 王建飞[1] 何广武[1] 

机构地区：[1]甘肃省地矿局第三地质矿产勘查院,甘肃兰州730050 [2]兰州大学地质科学与矿产资源学院,甘肃省西部矿产资源重点实验室,甘肃兰州730000 [3]甘肃省矿产资源储量评审中心,甘肃兰州730000

出　　处：《黄金科学技术》2016年第3期40-51,共12页Gold Science and Technology

摘　　要：位于西秦岭夏河—合作断裂带南侧的加甘滩金矿床是近年来新发现的一个超大型金矿床。为了确定金的载金矿物及其赋存形式,利用显微测试技术对金的赋存状态进行了研究,通过高倍光学显微镜和扫描电子显微镜对原生矿石样品进行了详细观察,确定原生浸染状矿石中的金属矿物主要为含砷黄铁矿和毒砂,但在扫描电子显微镜背散射(BSE)图像观察中均未发现自然金包裹体,故确定金在载金矿物中的赋存形式为次显微不可见金。Jiagantan gold deposit is a super-large gold deposit newly discovered in recent years, which is located at the south of Xiahe-Hezuo fault zone of West Qinling.The occurrence state of gold were studied by microscopic test technology, the primary ore samples were observed in detail by high power optical microscope and scanning electron microscope（SEM）.It is concluded that the metallic minerals in primary disseminated ore are mainly arsenic pyrite and arsenopyrite,and the natural gold inclusions couldn＇t be found in observing the BSE images.So the conclusion is that the microscopric invisible gold is occurrence state of gold in gold bearing minerals.

关 键 词：金的赋存状态 次显微不可见金 加甘滩金矿 甘肃省 

分 类 号：P618.51[天文地球—矿床学]