【作者】 王闻文；

【导师】 王绪本；

【作者基本信息】 成都理工大学 ， 固体地球物理学， 2011， 硕士

【摘要】 随着我国经济的快速发展,矿产资源的需求量迅猛增加,由于矿产资源的不可再生性,如何确保矿产资源的可持续供给,已成为国家长期的重要战略任务。而就我国目前的国情而言,今后再找到地表出露或浅部产出的金属矿床的可能性愈来愈小,因而攻深找盲、寻找深部隐伏矿已成为当前急待解决的重要课题和今后工作的重点。2002年10月,温家宝同志在新中国地质工作50年暨中国地质学会成立80周年纪念大会上强调:“随着我国经济持续、快速增长,全国45种主要矿产中一半以上的资源储量消耗速度大于增长速度,特别是东、中部地区过去耳熟能详的一批老矿山资源枯竭,成为危机矿山。在有市场需求和资源潜力的老矿山周边或深部,努力探寻新的接替资源,具有经济、社会双重效益,是当前的一项极为紧迫的任务。”拉拉铜矿及外围区域地质上位于我国西南地区最为重要的铜多金属成矿带,在该区针对深部隐伏矿体开展地球物理方法应用研究工作,具有重要的意义。本文主要以地质背景为基础,结合生产实际选择了拉拉铜矿和会东县M114航磁异常这两个研究区域,根据区内岩(矿)石的物性差异,使用大功率激发极化法、地面高精度磁法、音频大地电磁测深法来进行深部隐伏金属矿体勘查:(1)在拉拉铜矿落凼矿床北部,选用大功率直流激电法探测埋深相对较浅的铜、铁多金属矿体,研究该方法的应用效果。在拉拉铜矿落凼矿床南部的红泥坡矿区运用大功率直流激电法,研究地下深部极化体构成响应的可能性。(2)在M114航磁异常区开展地面高精度磁测及音频大地电磁测深工作,综合分析引起该航磁异常的地质体在地下的分布特征。重点分析音频大地电磁测深法对深部地下电性结构的响应效果;结合地质资料,初步划分地层以及断层,并分析其在地下的延展情况。(3)通过分析M114航磁异常区地面高精度磁法和音频大地电磁测深法的实际应用效果,结合红泥坡矿区的成矿地质特征,讨论了在红泥坡开展地面高精度磁测及音频大地电磁测深的可行性及拟解决的地质问题,提出针对该区隐伏矿体的地球物理勘探方法组合。本文在充分利用已有研究成果的基础上,结合研究区地质背景、成矿特征,开展了浅、中、深多尺度的地球物理测量,拟通过多参数的分析来降低物探解译过程中的多解性而达到提高解释精度的目的,从而为深部隐伏矿床(体)的定位预测提供较为可靠的地球物理依据。更多还原

【Abstract】 With the development of our economy, the demand of the mineral resource is rapidly increasing. Because the mineral resources is nonrenewable,how to ensure the sustainable supply has became the national long-term strategic task. Considering the fundamental conditions of China, the possibility of explorering metallic ore deposit which exposed surface or shallow is getting smaller.Exploring the deep concealed ore has become an important research subject. In October 2002, Premier wen jiabao in new China geological work in the geological society of China for 50 years and established the 80th anniversary commemoration meeting stressed: "along with our country economy sustained, rapid growth, the national 45 main mineral in more than half of the mineral reserves consumption growth rates, especially the speed is greater than the middle area, east of old mines familiar past resource exhaustion, become the crisis mines. In market demand and resource potential old mines surrounding or deep, efforts to find new take resources, has economic and social benefit both the, the current is a very pressing task."The geology environment of LALA copper mines and its periphery areas are located in the most important metal metallogenic belt in southwest area of China. It’s important to carry out geophysical technique applied researching for deep concealed orebodies in the region.Through analysing the geological background of LALA copper mines and its peripheral area, combining with the fact, we chose LALA copper mines and M114 aeromagnetic anomalies area in Huidong for applied research.Based on the geological background and the differences of physical property of the rock (mine) in the targeted area,we chose the high-power induced polarization method、ground high-precision geomagnetic method and AMT to carried out the applied researching for deep concealed orebodies prediction.(1) In the north of the LaLa copper mines,the applied effect of high-power TDIP was discussed,aimed at the shallower buried polymetallic ore body which consists mainly of copper and iron mines.In the HongNiPo area, we discussed the response possibility of the deep underground polarization body by using high-power TDIP method.(2) Applying the ground high-precision geomagnetic and AMT method in M114 aeromagnetic anomalies area,it is probably found out that the aeromagnetic anomalies characters of underground geological distribution.(3) Through analyzing the practical application effect of ground high-precision geomagnetic method and AMT sounding method in the M114 aeromagnetic anomalies area,combining the Ore-forming geological characteristics of HongNiPo mines area, it discussed the feasibility and the geological problems using ground high-precision geomagnetic method and AMT sounding method, and put forward the combination methods for exploring the concealed orebodies.In all, this paper make full use of existing research results,integrating geological background and the metallogenic features, then carried out the shallow, middle and deep multi-scale geophysical measurement.It proposed a method to reduce the multi-solutions and to improve the interpretation accuracy by multi-parameter analyzing in the process of geophysical interpretation.Thus it provided a more reliable geophysical basis for positioning prediction of deep concealed ore deposits.更多还原