综合找矿方法在青龙县七拨子金银矿床角砾岩矿段勘查中的找矿效果  

Prospecting effect of comprehensive prospecting method in the breccia ore section of Qibozi Gold Silver Deposit,Qinglong County

作　　者：白会良 李艳坤 杨昭克 刘彦兵 Bai Huiliang;Li Yankun;Yang Zhaoke;Liu Yanbing(Beijing Jinyou Geological Exploration Co.,Ltd.)

机构地区：[1]北京金有地质勘查有限责任公司,100011

出　　处：《黄金》2021年第12期20-24,共5页Gold

基　　金：中国黄金集团有限公司地质科研项目(DZKY2020-12)。

摘　　要：七拨子金银矿床大地构造位置位于华北地台北缘中段,遵化-迁西复杂褶皱构造区马兰峪复式背斜遵化穹褶束东部,密云-喜峰口-青龙-木头凳大断裂南侧,该断裂及两侧分布着众多金、银、钼矿床,其中最典型的为峪耳崖金矿床、金厂峪金矿床、华尖金矿床等。为在七拨子金银矿区角砾岩矿段实现找矿突破,进行了1∶2000地质填图、1∶10000岩石地球化学测量、可控源音频大地电磁测深等工作。岩石地球化学测量结果显示,七拨子金银矿区角砾岩矿段应以金、银为主攻矿种,并圈定了1处组合异常,可作为找矿靶区;可控源音频大地电磁测深结果显示,角砾岩为主要成矿地质体,具有较好的找矿潜力。通过工程验证,在地表圈定了银矿体,深部探获了蚀变花岗岩,且具有矿化显示,推测深部具有隐伏金矿体。实践表明,运用综合找矿方法极大程度地提高了找矿效果,并为今后在区域内开展矿产勘查工作提供了一定的理论依据和实践经验。The geotectonic location of Qibozi Gold Silver Deposit is the middle section on the northern margin of North China Platform,the east of Zunhua dome fold bundle of Malanyu complex anticline in Zunhua-Qianxi complex fold tectonic zone,the south side of Miyun-Xifengkou-Qinglong-Mutoudeng great fault.There are many gold,silver and molybdenum deposits on the fault and both sides.Among them,the most typical ones are Yuerya Gold Deposit,Jinchangyu Gold Deposit,Huajian Gold Deposit and so on.In order to make breakthrough of prospecting in breccia ore section of Qibozi Gold Silver Deposit,1∶2000 geological mapping,1∶10000 lithogeochemical survey and CSAMT were conducted.The results of lithogeochemical survey show that gold and silver are the major minerals that dominate Qibozi Gold Silver Deposit,and 1 combination anomaly was delineated as prospecting target;CSAMT shows that breccia is the main ore-forming geological body with good prospecting potential.Engineering verification shows that silver ore bodies were delineated on the surface,altered granite was discovered in the deep part and with mineralization implications.It is inferred that there are concealed gold ore bodies in the deep part.The practice shows that comprehensive prospecting methods greatly improve prospecting effect,and provide theoretical basis and experience for future mineral prospecting in the region.

关 键 词：岩石地球化学测量 可控源音频大地电磁测深 综合找矿方法 角砾岩 七拨子金银矿床 

分 类 号：TD15[矿业工程—矿山地质测量] P618.51[天文地球—矿床学]