浅析天水市水洞沟金矿床地质特征及找矿方向  

Analysis of Geological Characteristics and Exploration Direction of Shuidonggou Gold Deposit in Tianshui City

作　　者：郑璇 ZHENG Xuan(Gansu Provincial Geological and Mineral Exploration and Development Bureau First Geological and Mineral Exploration Institute,Tianshui 741020,China)

机构地区：[1]甘肃省地质矿产勘查开发局第一地质矿产勘查院,甘肃天水741020

出　　处：《世界有色金属》2024年第21期85-87,共3页World Nonferrous Metals

摘　　要：通过对祁连-北秦岭加里东造山带反S型构造带进行系统研究,在该区发现水洞沟金矿床,该矿主要存在这一构造带的南侧,区内的金矿化明显受控于该区的断裂(EW向)构造。褐铁矿化与黄铁矿化,还有绢云母化是主要的围岩蚀变,另外还有硅化蚀变等。同时发挥载金作用的矿物主要为褐铁矿以及黄铁矿和毒砂等。矿床主要受控于该区的断裂构造,金矿成矿与中酸性侵入岩和变砂岩紧密相关,找矿工作开展过程中,应当重点关注构造蚀变带(EW向)以及化探异常部位。Through a systematic study of the reverse S-shaped structural belt in the Qilian North Qinling Caledonian orogenic belt,a Shuidonggou gold deposit was discovered in the area.The deposit mainly exists on the south side of this structural belt,and the gold mineralization in the area is clearly controlled by the fault(EW direction)structure in the area.Brown iron mineralization and pyrite mineralization,as well as sericite alteration,are the main rock alteration,and there are also silicification alteration.The minerals that simultaneously play a role in carrying gold are mainly limonite,pyrite,and arsenopyrite.The ore deposit is mainly controlled by the fault structure in the area,and the mineralization of gold is closely related to intermediate acidic intrusive rocks and metamorphic sandstones.In the process of mineral exploration,special attention should be paid to the structural alteration zone(EW direction)and geochemical anomaly areas.

关 键 词：水洞沟金矿 地质特征 找矿方向 天水市 

分 类 号：P618.51[天文地球—矿床学]