文章摘要
高 鹏.青海祁漫塔格成矿带地球物理方法找矿有效性试验[J].地质与勘探,2017,53(5):923-934
青海祁漫塔格成矿带地球物理方法找矿有效性试验
Effectiveness experiments of geophysical methods in the Qimantage metallogenic belt of Qinghai Province
投稿时间:2017-05-15  修订日期:2017-07-23
DOI:
中文关键词: 地球物理勘探方法 青海 祁漫塔格 有效性试验
英文关键词: geophysical method, Qinghai Province, Qimantage, effectiveness experiment
基金项目:中国地质调查局“青海祁漫塔格成矿带金属矿地质矿产调查”项目(编号:12120113031600)和“东昆仑铜镍多金属资源基地调查”二级项目(编号:DD20160013)联合资助
作者单位E-mail
高 鹏 中国地质调查局西安地质调查中心陕西西安 gaomou24@163.com 
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中文摘要:
      随着青海祁漫塔格成矿带矿产地质调查工作的深入开展,地球物理勘探方法在该地区地质找矿中,特别是在隐伏矿床找矿中发挥着越来越重要的作用。通过对青海祁漫塔格成矿带中地形地貌特征具有代表性的夏日哈木镍矿区及其外围这一区域开展重力、磁测、激电中梯、可控源音频大地电磁测深、天然场源电磁测深等地球物理勘探的有效性试验及示范工作,证明在解决好施工过程中的一些技术问题后,这些方法在青海祁漫塔格成矿带的地质矿产调查工作中都是有效的。通过进一步总结认为,在该地区利用地球物理勘探方法进行重点区域调查时,应首先开展大于1:1万比例尺的高精度磁测、重力和激电中梯工作,细分异常,在此基础上,开展激电测深和电磁测深,以确定地下地质体的深度,进而通过综合研究,对其成矿前景进行评价。本文对方法有效性的认识,可作为在青海祁漫塔格成矿带开展地质矿产调查工作时地球物理勘探方法选择的参考。
英文摘要:
      With the deep development of mineral resources and geological surveys in the Qimantage metallogenic belt of Qinghai, geophysical methods are playing a more and more important role, especially in the prospecting of concealed deposits. The experiments and demonstration work of the geophysical methods including gravity, magnetism, IP intermediate gradient, CSAMT and AMT, have been conducted in the Xiarihamu nickel mine area and its periphery, which hosts typical topographic features in the Qimantage metallogenic belt in Qinghai. The results show that these methods are effective in the mineral resources and geological surveys in this area after solving some technical problems in the implementation process. Further summaries suggest that when geophysical methods are used to investigate the focused areas, the high-precision gravity, magnetic and IP intermediate gradient surveys at scales greater than 1:10000 should be carried out first, followed by fine analysis of the measured anomalies. Based on them, IP and electromagnetic sounding are made successively, permitting to determine depths of geological bodies in the subsurface. Finally, a comprehensive analysis on the metallogenic prospect is performed. This paper summarizes the effectiveness experiments of geophysical methods which can be used as a reference for the selection of geophysical methods in the mineral resources and geological survey in the Qimantage metallogenic belt of Qinghai.
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