综合物探在哈密某铜矿的应用与研究

发布时间：2018-05-23 13:39

本文选题：哈密 + 铜矿　；参考：《成都理工大学》2015年硕士论文

【摘要】：为圈定研究区域铜矿的找矿靶区并查明隐伏矿体的空间分布,应用高精度地面磁测、激电测深和可控源音频大地电磁测深进行综合物探,研究该矿区地面磁异常特征,进行间接寻找无磁性的铜矿。首先利用插值切割法将磁异常分为区域异常和局部异常,即将磁异常分成深部场源和浅部场源所引起;其次对磁异常值进行延拓处理,消除局部突变异常;最后用经验切线法和2.5D联合反演以确定磁异常源的埋藏深度,再结合地质情况,对磁异常的地质原因进行初步分析推断。而激电测深能够在拟断面上,显示异常体的形态及埋深。CSAMT测深能够获得断面上的电性特征,从而推断深部高阻和低阻层的空间分布特征。最后对三种物探异常的特征进行综合分析,推断区内地质构造及铜矿(化)分布。论文以哈密某铜矿为例,应用高精度磁测得到两个强磁异常区域C1和C2,结合地质特征和地球物理特征以及地球化学特征情况,确定C1异常区为铜矿预查靶区。通过布设在C1高磁异常区的三条测线的激电测深结果,推测出深部有高极化、低电阻、强磁性的板状体,其走向近东西,产状近乎直立的金属硫化物矿(化)体,因地表未见出露,具体的地质情况需要在工程揭露后予以确认。在CSAMT测深剖面获得多个高低阻层。将这些高低阻层与磁异常关联,认为磁异常与构造、地层的关系较为紧密,不排除构造成矿的可能性。上述几种物探方法在哈密铜矿区的应用研究表明:综合物探能较准确地圈定铜矿的找矿靶区,比较准确地反映矿体的走向、位置、埋深和形状等;可以有效的推测隐伏矿体及断裂的空间分布情况。
[Abstract]:In order to delineate the prospecting target area of copper ore in the study area and find out the spatial distribution of the hidden ore body, the high precision ground magnetic survey, the excitation sounding and the controllable source audio magnetotelluric sounding are used for comprehensive geophysical exploration. The ground magnetic anomaly characteristics of the mining area are studied and the non magnetic copper mines are searched indirectly. Firstly, the magnetic anomalies are divided into regions by interpolation cutting method. The anomalies and local anomalies are caused by the magnetic anomaly divided into the deep field source and the shallow field source. Secondly, the magnetic anomaly value is extended to eliminate the local mutation anomaly. Finally, the buried depth of the magnetic anomaly source is determined by the empirical tangent method and the 2.5D combined inversion, and the geological reasons of the magnetic anomaly are preliminarily analyzed and deduced. The excitation power sounding can show the shape of the abnormal body and the depth of the depth.CSAMT sounding to obtain the electrical characteristics on the cross section, so as to infer the spatial distribution characteristics of the deep high resistance and the low resistivity layer. Finally, the characteristics of the three geophysical anomalies are synthetically analyzed to infer the quality structure and the copper mine distribution in the area. The paper is based on a certain copper in Hami. As an example, two strong magnetic anomaly regions C1 and C2 are obtained by high precision magnetic measurement. According to the geological features, geophysical characteristics and geochemical characteristics, the C1 anomaly area is determined as the precheck target area for copper mines. The results of the three lines set in the high magnetic anomaly area of the C1 are obtained by the result of the polarization, low resistance and strong magnetism. The plate body, which goes to the near east-west, produces near erect metallic sulfide ore (chemical) body, has not been exposed on the ground, and the specific geological conditions need to be confirmed after the project is exposed. A number of high and low resistivity layers have been obtained in the CSAMT sounding section. The application of these geophysical prospecting methods in Hami copper ore area shows that comprehensive geophysical prospecting can accurately delineate the prospecting target area of copper ore, and accurately reflect the direction, position, depth and shape of the ore body, and can effectively speculate on the spatial distribution of hidden ore bodies and faults.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.41;P631

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