| 音频大地电磁测深在湘西“大塘坡式”锰矿勘查区应用研究 |
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| 引用本文： | 祁,民.音频大地电磁测深在湘西“大塘坡式”锰矿勘查区应用研究[J].地质与勘探,2019,55(S1):365-371. |
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| 作者姓名： | 祁 民 |
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| 作者单位： | 中国冶金地质总局矿产资源研究院，北京； 中国冶金地质总局地球物理勘查院，河北保定 |
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| 基金项目： | 中国地质调查局湘西-滇东地区矿产地质调查项目（编号：DD20160032）资助 |
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| 摘 要： | 湘西磨石锰矿勘查区位于湘黔桂三省交界处，属于扬子地台东南缘，区内赋矿地层南华系大塘坡组与黔东松桃特大型锰矿赋矿层位属同一地层。但本文区内沉积锰矿层具有总体连续，局部断续的特点，而且后期构造变形复杂，因此确定深部矿体走向具有很大难度。赋矿地层大塘坡组岩性为黑色含锰炭质板岩，下伏地层南华系富禄组为中细粒石英砂岩，上覆地层南华系洪江组为含砾砂质板岩，含矿地层与围岩电阻率物性差异显著。本文在磨石矿区开展音频大地地磁测深，大致查明了地层走向与构造特征，为下一步勘查工作提供了重要依据。
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| 关 键 词： | 大塘坡组 磨石锰矿 音频大地电磁测深 |
| 收稿时间： | 2018/9/14 0:00:00 |
| 修稿时间： | 2019/1/17 0:00:00 |
Application of the audio-frequency magnetotelluric method to prospecting of the Moshi manganese ore area in western Hunan Province |
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| Qi Min.Application of the audio-frequency magnetotelluric method to prospecting of the Moshi manganese ore area in western Hunan Province[J].Geology and Prospecting,2019,55(S1):365-371. |
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| Authors: | Qi Min |
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| Institution: | Institute of Mineral Resources Research, China Metallurgical Geology Bureau, Beijing; Geophysical Exploration Bureau , China Metallurgical Geology Bureau, Baoding, Hebei |
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| Abstract: | The Moshi manganese ore deposit in western Hunan, is situated on the bounders between 3 provinces (Hunan, Guizhou, and Guanagxi), tectonically in the southeastern margin of the Yangtze platform. Its ore-containing stratum, Datangpo Formation of Nanhua System, which is the same ore-host stratum of the Songtao super-large manganese ore deposit in eastern Guizhou. The manganese mineralization beds are overall-continuous, locally interrupted, with complicated tectonic deformation of later period, thus making it very difficult to determine the direction of the ore body at depth. The Datangpo rock is black manganese-bearing carbonaceous slate, while the underlying Fulu Formation is medium-fine grained quartz sandstone, and the overlying Hongjiang Formation is gravel-bearing sanding slate, which has obvious electric differences with its surrounding rocks. In this work, by using the audio-frequency magnetotelluric method, the strike of rocks and structural feature are largely clarified, which provides an important basis for the further exploration. |
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| Keywords: | Datangpo Formation Moshi maganese audio-requency magnetotelluric method |
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