Application of Integrated Electrical Prospecting in Carbonaceous Rock Series of Xinjiazui Gold Deposit
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摘要:
秦岭地区辛家咀金矿位于陕西汉中“勉略宁金三角”地带西侧，区域金成矿潜力突出。但由于区内广泛分布含碳地层，对传统物化探手段均造成一定干扰。本次研究通过音频大地电磁测深法（AMT）及激发极化法等综合电法勘探的应用，查明了辛家咀金矿控矿断裂深部形态特征，探索含碳地层金矿深部找矿预测技术方法组合，探讨成矿机制并总结赋矿标志。综合电法勘探可获得研究区深部电性结构特征，从而对含碳岩系干扰下金矿深部赋存位置进行定位预测并形成赋矿标志，经深部工程验证取得区域找矿新发现，也对研究区成矿机制提出新认识。
Abstract:The Xinjiazui gold deposit in Qin-ling area is located in the west of Mianluoning Golden Triangle in Hanzhong, Shaanxi Province, This gold deposit has great metallogenic potential. However, Carbon-bearing strata are widely distributed in the area, the traditional geophysical and geochemical exploration methods are interfered to some extent. In this paper, through the application of integrated electrical exploration such as audio magneto-telluric sounding (AMT) and induced polarization（IP） method, the deep morphological characteristics of ore-controlling fault in Xinjiazu gold deposit are identified, the combination of deep prospecting prediction technology and method for gold deposits in carbon-bearing strata is explored, the metallogenic mechanism is discussed and the ore deposit markers are summarized. Comprehensive electrical exploration can obtain the deep electrical structure characteristics of the study area, so as to locate and predict the deep occurrence location of gold deposits under the interference of carboniferous rock series and form the ore deposit markers. New discoveries of regional prospecting have been obtained through the deep engineering verification, and the metallogenic mechanism of the study area is proposed.
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表 1 测区主要岩石电性参数统计表
Table 1. Statistical table of main rock electrical parameters in the test area
地层 岩性 块数 电阻率（Ω·m） 充电率（ms） 均值 最大值 最小值 均值 最大值 最小值 志留系
黄坪组千枚岩 34 1488 4182 245 2.93 3.9 2.4 铁质菱镁矿千枚岩 33 2005 3260 593 7.32 8.87 5.9 石英脉 41 285310 1072806 770 7.7 17.15 0.89 寒武系
牛蹄塘组粉砂质板岩 39 237 937 113.5 2.9 4.2 1.9 硅质板岩 29 647 4380 61.4 4.4 12.2 1.5 含碳硅质板岩 33 103 318 8.3 74 169.7 22.3 碳质板岩 32 21.7 39.1 8.5 49 87 24.3 
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