云南省易门县铜厂矿区物探异常推断解释研究
发布时间：2018-09-10 11:13
【摘要】：中国既是对铜矿有大需求的国家也是铜矿资源短缺的国家。易门铜矿带是滇中地区重要的铜资源产区,该处发育大量铜矿床(点)。目前,易门铜矿带的狮凤山铜矿濒临闭坑,而铜厂矿区具备接替矿山的基本条件。受玉溪矿业有限公司的委托,昆明理工大学对易门铜厂及外围铜矿成矿规律与找矿预测进行研究,为选定接替矿山提供科学依据。2010年,云南省有色地质局地质地球物理化学勘查院在铜厂矿区南部开展了物探工作,取得了一定的成果,但在北部,相应的物探工作还未开展。激发极化法(IP)在寻找铜矿中是一种快速、高效和经济的方法,IP可以发现和研究浸染型矿体,也可以发现规模较小,埋深较大的矿体；高频大地电磁法(EH4)具有高精度、高分辨率,设备轻、速度快、探测深度大(可达1000m)、对低阻异常反应明显等特点。在铜厂矿区北部的新庄矿段开展IP扫面工作,结合IP异常分布、特征及勘查区地质条件等情况,在重点剖面处布置EH4工作,目的主要是为了寻找热液脉型矿体,兼顾寻找铜厂式矿体。新庄矿段IP工作网度为50×20m,共完成0.35km2扫面工作, EH4点距为20m,共完成1.8km剖面工作,采集岩(矿)石标本211件。对岩(矿)石物性特征进行统计分析,归纳总结了岩(矿)石磁性参数、电性参数、放射性参数和密度参数特征。由于勘查区存在炭质层干扰,为了突出矿体异常,较好的分离区域场和异常场,对采集的IP数据进行最小二乘法趋势分析处理,共获得9个IP异常；对采集的EH4数据进行IMAGEM反演,反演结果显示视电阻率数据可能受到静态效应的影响,使用电磁阵列剖面法及小波变换方法进行静态效应压制处理,后选择相应的处理数据绘制深度-视电阻率断面图,共获得28个EH4异常。本文在收集勘查区地质、地球物理和地球化学的基础上,建立了地球物理、地球化学的异常模型。后通过对IP异常和EH4异常的推断解释分析,并结合勘查区地质特征、控矿构造特征及已建立的异常模型等,圈定了3个找矿靶区,推测估算勘查区远景资源量约为3万吨。对靶区I-3进行工程验证,见到热液脉型铜矿,证明了物探投入方法的有效性,同时也为铜厂矿区下一步找矿工作指明了方向。
[Abstract]:China is both a country with a large demand for copper and a shortage of copper resources. The Yimen copper belt is an important copper resource producing area in central Yunnan, where a large number of copper deposits are developed. At present, Shifengshan copper deposit in Yimen copper belt is close to the pit, and Tongchang mine has the basic conditions to replace the mine. Entrusted by Yuxi Mining Co., Ltd, Kunming University of Science and Technology studied the metallogenic regularity and prospecting prediction of Yimen Copper Factory and its peripheral copper deposits, which provided a scientific basis for the selection of replacement mines. In 2010, The Geophysical Geophysical and Chemical Exploration Institute of Yunnan Nonferrous Geology Bureau has carried out geophysical prospecting work in the southern part of Tongchang Mining area and has achieved certain results, but the corresponding geophysical prospecting work has not been carried out in the north. The induced polarization method (IP) is a fast, efficient and economical method for finding copper deposits. IP can also find ore bodies with small scale and large buried depth. High frequency magnetotelluric method (EH4) has high precision and high resolution. The equipment is light, the speed is fast, the detection depth is large (up to 1000m), and the reaction to the low resistivity anomaly is obvious. IP sweep work is carried out in Xinzhuang section in the northern part of Tongchang mining area. Combined with the abnormal distribution of IP, characteristics and geological conditions of the exploration area, EH4 work is arranged at key sections, the main purpose of which is to find hydrothermal vein orebodies. Look for copper-type orebodies as well. The IP work network of Xinzhuang mine section is 50 脳 20m, the 0.35km2 scanning surface work is completed, the EH4 point distance is 20m, the 1.8km section work is completed, and the samples of rock (ore) are collected. The characteristics of magnetic parameters, electrical parameters, radioactivity parameters and density parameters of rock (ore) rocks are summarized by statistical analysis. In order to outshine ore body anomaly and separate area field and anomaly field, the collected IP data were analyzed and processed by least square method. Nine IP anomalies were obtained. The IMAGEM inversion of the collected EH4 data shows that the apparent resistivity data may be affected by static effects. The electromagnetic array profile method and wavelet transform method are used to suppress the static effects. Then, 28 EH4 anomalies were obtained by selecting the corresponding processing data to draw the depth-apparent resistivity profile. On the basis of collecting geology, geophysics and geochemistry in the exploration area, the anomaly model of geophysics and geochemistry is established in this paper. Based on the analysis of IP anomaly and EH4 anomaly, combined with geological characteristics of exploration area, ore-controlling structure characteristics and established abnormal model, three prospecting target areas are delineated, and the prospective resource quantity of exploration area is estimated to be about 30 thousand tons. The engineering verification of I-3 in target area shows that the hydrothermal vein type copper deposit is effective, which proves the validity of the geophysical exploration method and points out the direction of the next prospecting work in Tongchang mining area.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.41;P631
本文编号：2234278
[Abstract]:China is both a country with a large demand for copper and a shortage of copper resources. The Yimen copper belt is an important copper resource producing area in central Yunnan, where a large number of copper deposits are developed. At present, Shifengshan copper deposit in Yimen copper belt is close to the pit, and Tongchang mine has the basic conditions to replace the mine. Entrusted by Yuxi Mining Co., Ltd, Kunming University of Science and Technology studied the metallogenic regularity and prospecting prediction of Yimen Copper Factory and its peripheral copper deposits, which provided a scientific basis for the selection of replacement mines. In 2010, The Geophysical Geophysical and Chemical Exploration Institute of Yunnan Nonferrous Geology Bureau has carried out geophysical prospecting work in the southern part of Tongchang Mining area and has achieved certain results, but the corresponding geophysical prospecting work has not been carried out in the north. The induced polarization method (IP) is a fast, efficient and economical method for finding copper deposits. IP can also find ore bodies with small scale and large buried depth. High frequency magnetotelluric method (EH4) has high precision and high resolution. The equipment is light, the speed is fast, the detection depth is large (up to 1000m), and the reaction to the low resistivity anomaly is obvious. IP sweep work is carried out in Xinzhuang section in the northern part of Tongchang mining area. Combined with the abnormal distribution of IP, characteristics and geological conditions of the exploration area, EH4 work is arranged at key sections, the main purpose of which is to find hydrothermal vein orebodies. Look for copper-type orebodies as well. The IP work network of Xinzhuang mine section is 50 脳 20m, the 0.35km2 scanning surface work is completed, the EH4 point distance is 20m, the 1.8km section work is completed, and the samples of rock (ore) are collected. The characteristics of magnetic parameters, electrical parameters, radioactivity parameters and density parameters of rock (ore) rocks are summarized by statistical analysis. In order to outshine ore body anomaly and separate area field and anomaly field, the collected IP data were analyzed and processed by least square method. Nine IP anomalies were obtained. The IMAGEM inversion of the collected EH4 data shows that the apparent resistivity data may be affected by static effects. The electromagnetic array profile method and wavelet transform method are used to suppress the static effects. Then, 28 EH4 anomalies were obtained by selecting the corresponding processing data to draw the depth-apparent resistivity profile. On the basis of collecting geology, geophysics and geochemistry in the exploration area, the anomaly model of geophysics and geochemistry is established in this paper. Based on the analysis of IP anomaly and EH4 anomaly, combined with geological characteristics of exploration area, ore-controlling structure characteristics and established abnormal model, three prospecting target areas are delineated, and the prospective resource quantity of exploration area is estimated to be about 30 thousand tons. The engineering verification of I-3 in target area shows that the hydrothermal vein type copper deposit is effective, which proves the validity of the geophysical exploration method and points out the direction of the next prospecting work in Tongchang mining area.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.41;P631
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