贵州独山半坡锑矿CSAMT法深部找矿预测

发布时间：2018-05-14 03:37

本文选题：锑矿 + CSAMT法　；参考：《金属矿山》2017年02期

【摘要】：贵州独山半坡锑矿处于扬子地块东南缘与华南褶皱带的复合部位,为华南锑矿带具有代表性的大型锑矿床之一。该矿经过30多年开采,工业储量已消耗殆尽,为缓解资源危机,采用可控源音频大地电磁法(Controlled source audio-frequency magnetotelluric method,CSAMT)对该矿区进行深部找矿预测研究。结合相关地质工作成果,在分析矿区地质特征的基础上,首先在半坡锑矿已知矿体上方选择试验坡面进行了CSAMT探测。试验表明,与锑矿化有关的硅化蚀变体与解译异常套合较好,可见采用该法寻找深部蚀变地质体实现间接寻找深部隐伏锑矿床具有可行性。然后在半坡锑矿边深部系统开展了CSAMT法探测工作,对探测数据采用曲线平移法进行静校正后进行了二维地形反演,并结合矿区成矿地质特征进行了综合解译。研究表明:1矿区L112~L122线深部存在一向上隐伏隆起构造,半坡断层与半坡隆起构造顶部交切和隆起顶部的剥离空间为有利的成矿区域;2CSAMT解译的高阻体附近相对低阻区为重点找矿区域,成矿断层+CSAMT解译的封闭高阻体为该区重要的找矿标志;3L118线117.2#点位深部存在隐伏锑矿体的可能性较大。结合上述分析,在L118线117.2#点位附近布设了WZK118-1钻孔进行验证,结果表明:在695.39~697.33 m深部见到新隐伏富锑矿体,其赋存位置与CSAMT断面解译的可能存在隐伏锑矿(化)体的位置基本吻合,可见采用CSAMT法在该矿区进行锑矿深部找矿具有一定的成效,可供类似矿山深部找矿参考。
[Abstract]:The Dushan Banpo antimony deposit is located in the southeast margin of the Yangtze block and the South China fold belt, and is one of the representative large antimony deposits in the South China antimony ore belt. After more than 30 years of exploitation, the industrial reserves of the mine have been exhausted. In order to alleviate the resource crisis, the controlled source audio-frequency magnetotelluric method (CSAMTT) is used to study the deep prospecting in this mine. On the basis of analyzing the geological characteristics of the mining area and combining the related geological work results, the CSAMT exploration was carried out on the experimental slope above the known ore body of Banpo antimony deposit. The experimental results show that the silicification alteration associated with antimony mineralization is better than the interpretation anomaly, which shows that it is feasible to use this method to find deep altered geological bodies and indirectly search for deep concealed antimony deposits. Then the CSAMT method is carried out in the deep system of Banpo antimony deposit. The static correction of the data is carried out by using the curve translation method, and then the two-dimensional terrain inversion is carried out, and the comprehensive interpretation is carried out according to the metallogenic geological characteristics of the ore area. The study shows that there is an upward concealed uplift in the deep part of the L112~L122 line in the Wei-1 mining area. The intersecting space between the top of the Banpo fault and the top of the uplift and the exfoliation space at the top of the uplift are favorable ore-forming areas. The relatively low resistivity areas near the high resistivity bodies interpreted by 2CSAMT are the key prospecting areas. The closed high resistivity body interpreted by CSAMT of metallogenic fault is an important ore-prospecting marker in this area. The hidden antimony ore body is likely to exist in the deep of 117.2# point of Qian3L118 line. Combined with the above analysis, the WZK118-1 borehole was set up near the 117.2# point of L118 line for verification. The results show that the new concealed antimony rich ore body is found in the depth of 695.39 ~ 697.33 m. The location of its occurrence is basically consistent with that of concealed antimony ore bodies interpreted by CSAMT section, which shows that the use of CSAMT method for deep prospecting of antimony deposits in this mine has certain results and can be used as a reference for prospecting in similar mines.
【作者单位】：贵州省有色金属和核工业地质勘查局五总队;贵州省有色金属和核工业地质勘查局物化探总队;
【基金】：贵州省整装勘查基金项目(编号:ZZKC2013-15)
【分类号】：P631.325

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