| 大比例尺综合物化探测量在浅覆盖区脉状金矿中的找矿实践-以胶东东部乳山于家圈金矿为例 |
| 投稿时间：2023-04-01 修订日期：2024-12-21 点此下载全文 |
| 引用本文：李秀章.大比例尺综合物化探测量在浅覆盖区脉状金矿中的找矿实践-以胶东东部乳山于家圈金矿为例[J].地质与勘探,2025,61(1):54-63 |
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| 基金项目:山东省地质勘查项目“山东省胶莱盆地东部海阳垛崮顶-乳山南地口地区金铅锌调查评价”（鲁
勘字[2021]31号），山东省重大科技创新工程项目(编号：2018CXGC1601)和山东省地矿局科技创新与科技攻关项目(编号：KY202112、KY202226)联合资助 |
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| 中文摘要:胶东是全球三大金矿集区之一和中国最重要的黄金资源基地，脉状金矿床在胶东广泛分布。胶东东部第四系覆盖层薄但分布广泛,且植被发育，导致地表找矿标志不明显, 传统单一的找矿方法对脉状金矿识别难度较大，加之地质勘查程度不断提高，导致该区脉状金矿找矿难度较大。位于胶东东部浅覆盖区的乳山于家圈地区发育1处以金为主的水系沉积物综合异常，该异常强度高，规模较大，浓集中心明显，元素套合好，显示出良好的找矿潜力。本次利用1∶1万地物（激电中梯） 化（土壤） 综合剖面对对该异常进行了查证，发现6条金矿化蚀变带，快速查明了引起异常的原因，圈定了找矿靶区；利用槽探和钻探工程对该异常及矿化蚀变带进行了揭露和控制，发现了山东省乳山市于家圈金矿床，取得了良好的找矿效果，证明了大比例尺综合物化探测量在胶东东部浅覆盖区寻找脉状金矿的有效性。 |
| 中文关键词:大比例尺综合物化探测量 浅覆盖区 脉状金矿 于家圈 乳山 胶东东部 |
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| Prospecting practice of comprehensive large-scale geophysical and geochemical exploration in vein-type gold deposits with shallow overburden: Taking the Yujiaquan gold deposit in Rushan City of eastern Jiaodong as an example |
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| Abstract:Jiaodong is one of the three major gold mining areas in the world and the most important gold resource base in China where vein-type gold deposits are widely distributed. The Quaternary cover in the eastern part of Jiaodong is thin but widely distributed, and the vegetation is developed, resulting in unclear surface prospecting indicators. Traditional single prospecting methods are difficult to identify vein-type gold deposits, and with the continuous improvement of geological exploration, it is more difficult to find vein-type gold deposits in this area. The Yujiaquan area of Rusha City, located in the shallow coverage area of eastern Jiaodong, has developed a comprehensive anomaly of stream sediments dominated by gold. This anomaly has high intensity, large scale, obvious concentration center, good element combination, and shows good prospecting potential. The anomaly was verified using a 1:10000 comprehensive profile of mineralized soil (induced polarization gradient), and six gold mineralization alteration zones were discovered. The causes of the anomaly were quickly identified, and the prospecting target area was delineated. The anomaly and mineralized alteration zone were exposed and controlled through trenching and drilling engineering, and the Yujiaquan gold deposit in Rushan City, Shandong Province was discovered, achieving good prospecting results. This study proves the effectiveness of large-scale comprehensive geophysical and geochemical exploration surveys in searching for vein-type gold deposits in shallow coverage areas in eastern Jiaodong. |
| keywords:large scale comprehensive geophysical and geochemical exploration survey, shallow overburden area, vein-type gold deposit, Yujiaquan , Rushan City, eastern Jiaodong |
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