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辽东小佟家堡子金矿床地球物理测井响应特征及找矿标志
刘东明, 梁明星, 冯杰, 欧洋, 杨毅, 翟景红, 林振洲, 高文利
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PDF(7235 KB)
辽东小佟家堡子金矿床地球物理测井响应特征及找矿标志
Response Characteristics and Its Prospecting Signs of Geophysical Well Logging in Xiaotongjiabuzi Gold Deposit, Eastern Liaoning Province
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辽东地区是我国重要的黄金产区，实现深部找矿新突破已成为该区的重点研究任务.地球物理方法是发现和探测深部金矿的主要技术手段.为了精细刻画青城子矿集区地层结构，准确揭示深部矿化蚀变带物探异常特征，建立深部找矿物探解释标尺，在小佟家堡子金矿区ZK12-11孔开展了多参数地球物理测井和井中物探测量工作，结合钻孔岩心编录，利用直方图、交会图等技术分析了该孔300~990 m井段岩性和矿化蚀变带的响应特征，划分了钻孔岩性剖面和矿化蚀变层位.结果表明：自然伽马、电阻率、磁化率和极化率4种参数能够区分钻孔主要岩性，可以作为重建钻孔岩性剖面的主要依据；黄铁矿化层位黄铁矿含量不高，不足以引起地层电阻率的明显降低，石墨化是引起电阻率降低的主要因素；自然伽马高低过渡带与低阻高极化无磁异常带是小佟家堡子金矿区地球物理测井找金的找矿标志.地球物理测井能够有效圈定找金有利层位，更加精确地指导金矿深部找矿工作，应受到广泛重视.
Liaodong is an important gold producing area in China, and it has become a key research direction to achieve a new breakthrough in deep prospecting here. Geophysical method is the main technical means to discover and detect deep gold deposits. In order to finely characterize the stratigraphic structure of Qingchengzi ore concentration area, accurately reveal the geophysical anomalous characteristics of deep mineralized alteration zone, and establish the geophysical interpretation scale for deep prospecting, multi-parameter geophysical logging and borehole geophysical survey were carried out in ZK12-11 hole in Xiaotongjiabuzi gold mining area. Combined with drill core logging, the response characteristics of lithology and mineralized alteration zone of 300-990 m well section of the hole were analyzed by histogram and crossplot, and the drilling lithology profile and mineralized alteration layer were divided. The results show that the four parameters of natural gamma, apparent resistivity, magnetic susceptibility and polarizability can distinguish the main lithology of borehole, and can be used as the main basis for reconstructing the lithology profile of borehole. The content of pyrite in the pyritization layer is not high enough to cause the decrease of formation resistivity. Graphitization is the main factor causing the decrease of resistivity. The natural gamma high-low transition zone and the low resistivity and high polarization non-magnetic anomaly zone are the prospecting signs of geophysical logging for gold prospecting in Xiaotongjiabuzi gold deposit. Geophysical logging can effectively delineate favorable horizons for gold prospecting, and guide the deep prospecting work of gold deposit more accurately, which should be paid extensive attention.
地球物理勘探 / 测井 / 小佟家堡子 / 金矿 / 岩性响应特征 / 矿化蚀变响应特征 / 找矿标志 / 矿床学
geophysical prospecting / well logging / Xiaotongjiabuzi / gold deposit / lithological response characteristics / mineralized alteration response characteristics / prospecting signs / ore deposits
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本文撰写得到了中国地质科学院地球物理地球化学勘查研究所邓晓红教授级高级工程师、邱礼泉教授级高级工程师、孔广胜教授级高级工程师的指导；野外数据采集期间得到了辽宁省有色地质局一〇三队工作人员的帮助与支持；论文使用了辽宁省有色地质局一〇三队的岩心资料；审稿专家对本文提出了宝贵意见，在此一并表示最诚挚的谢意！
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