| 多种电磁测深技术在深部控矿构造探测中的应用研究—以泥河铁矿为例 |
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| 引用本文： | 匡海阳,吕庆田,张昆,严加永,陈向斌.多种电磁测深技术在深部控矿构造探测中的应用研究—以泥河铁矿为例[J].地质学报,2012,86(6):948-960. |
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| 作者姓名： | 匡海阳 吕庆田 张昆 严加永 陈向斌 |
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| 作者单位： | 东华理工大学 中国地质科学院矿产资源研究所,中国地质科学院矿产资源研究所,中国地质科学院矿产资源研究所,中国地质科学院矿产资源研究所 |
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| 基金项目： | 国家科技专项“深部矿产资源立体探测技术与实验”（编号SinoProbe-03）、国家自然科学基金重点项目（编号40930418）、地质调查项目“长江中下游地区地壳精细结构与控矿研究”（编号1212010981004）和科技支撑计划项目“玢岩型铁（硫）矿深部勘查技术与找矿示范研究”（编号2009BAB43B02） |
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| 摘 要： | 长江中下游成矿带是我国东部重要的铁、铜多金属矿产资源基地,使用现代地球物理探测技术对该成矿带典型矿床深部结构进行探测,对认识深部矿床成因、总结找矿方法和深部找矿的实践具有重要意义。本文选取位于长江中下游成矿带庐枞矿集区内的泥河玢岩铁矿为实验区,开展了音频大地电磁(AMT)、可控源音频大地电磁(CSAMT)和瞬变电磁(TEM)等电磁法探测实验;通过对AMT、CSAMT和TEM数据的处理和反演,发现3者相同测线反演结果反映的控矿地质体电性特征基本一致,但细节上存在一定差异。综合3种电磁测深反演结果,电性特征刻画了砖桥组火山岩地层分布,分辨出闪长玢岩体的隆起部位和基本形态,揭示了矿体的赋存位置。认为在合理的数据采集、处理和反演条件下,电磁测深能有效地区分复杂地质构造条件下次火山岩与围岩的电性差异,找到控矿构造界面,从而推断出矿体的位置。
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| 关 键 词： | 玢岩铁矿 泥河 深部找矿 AMT CSAMT TEM |
| 收稿时间： | 5/13/2011 9:51:59 AM |
| 修稿时间： | 5/17/2012 8:44:29 AM |
Application of Prospecting Deep Structure in Ore District by Comprehensive Magnetotelluric Sounding: A Case History of Nihe Porphyrite Iron Ore Deposite |
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| kuanghaiyang,Lv Qingtian,Zhang Kun,Yan Jiayong and Chen Xiangbin.Application of Prospecting Deep Structure in Ore District by Comprehensive Magnetotelluric Sounding: A Case History of Nihe Porphyrite Iron Ore Deposite[J].Acta Geologica Sinica,2012,86(6):948-960. |
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| Authors: | kuanghaiyang Lv Qingtian Zhang Kun Yan Jiayong and Chen Xiangbin |
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| Institution: | ECIT CAGS,Institute of Mineral Resources Chinese Academy of Geological Sciences,CAGS,CAGS |
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| Abstract: | Middle-Lower Yangtze Valley is an important poly-metallic mineral deposits base in eastern China. Prospecting the deep structure in typical deposits by advanced geophysical survey is necessary for finding out the origin of deep deposit and strengthening different geophysics technologies in mineral exploration. In this paper, we chose Nihe porphyrite iron ore in Luzong district, Anhui province, as an experiment plot, conducted audio magnetotelluric (AMT) sounding, controlled source audio magnetotelluric (CSAMT) sounding and transient electromagnetic (TEM) sounding in the same place. The results of data processing and inversion on same line indicate similar electrical character, though some details are different. Combined the results of three methods, we found out the interface of brick bridge group volcanic rock by electrical character, located the location and shape of invaded diorite-porphyrite, inferred the position of ore-body. This survey proved that after reasonable data processing and inversion, magnetotelluric sounding could distinguish subvolcanic rock and wall rock by the difference of electrical character, found the interface of ore-control structure, and then inferred the position of ore-body. |
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| Keywords: | porphyrite iron ore deposit Nihe deep ore-prospecting AMT CSAMT TEM |
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