地质学报2012，Vol.86Issue(6)：948-960,13.
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
Application of Comprehensive Magnetotelluric Sounding Technique in Prospecting Deep Structures: A Case Study of Nihe Porphyrite Iron Deposit
摘要
Abstract
Middle-Lower Yangtze Valley is an important base of poly-metallic mineral deposits in eastern China. Advanced geophysical survey was employed to prospect the deep structures in typical deposits, and this is of great significance in understanding the genesis of the deep deposits and summarizing exploration methods. In this paper, we chose the Nihe porphyrite iron ore in the Luzong district, Anhui province, as a trial site. Audio magnetotelluric (AMT) sounding, controlled source audio magnetotelluric (CSAMT) sounding and transient electromagnetic (TEM) sounding were carried out. Through the processing and inversion of AMT, CSAMT and TEM data, it is discovered that ore-controlling geological bodies are basically similar in electrical characters but different in some details. The results of three methods, and electrical characters determined distribution of the Zhuanqiao Formation volcanic rock, and identified positions and shape of diorite porphyrite, and inferred the position of ore bodies. Out study suggests that under the condition of processing and reversion of reasonable data, magnetotelluric sounding can distinguish the difference of electrical characters between subvolcanic rock and wall rock to effectively position the interface of ore-controlling structures and thus to infer the positions of ore-bodies.关键词
玢岩铁矿/泥河/深部找矿/AMT/CSAMT/TEMKey words
porphyrite iron ore deposit/ Nihe/ deep ore-prospecting/ AMT/ CSAMT/ TEM引用本文复制引用
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):948-960,13.基金项目
本文为国家科技专项"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基金项目"长江中下游成矿带深部动力学与成矿作用研究"(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)联合资助的成果. （编号SinoProbe-03）
