内蒙古东乌旗洛恪顿铅锌多金属矿区地电化学方法技术研究

发布时间：2018-04-17 21:49

本文选题：地电化学测量 + 洛恪顿铅锌多金属矿　；参考：《中国地质大学(北京)》2015年硕士论文

【摘要】：近年来,随着地质勘探工作的不断深入,地表露头矿及浅部矿逐年减少,覆盖区找矿已经成为地质勘查工作的重点。而常规化探方法对于埋藏较深的矿床找矿效果不好。因此,国内外学者研发了一些非常规的化探方法技术,以应用于覆盖区的矿产勘查工作。地电化学就是其中应用较多的一种,其原理在人工外加电场作用下,将近地表介质中电活动态物质选择性提取至指定接收电极,研究载体中的电提取元素组合、含量分布及异常特征,进而提供找矿信息的一种勘查方法。本文工作区的洛恪顿铅锌多金属矿床为典型的隐伏矿床,矿区位于国家重点整装勘查区-东乌旗整装勘查区内,该矿床至今还处于勘查阶段,尚无采矿污染,是开展地电化学勘查试验较理想的地区。本次研究工作主要包括以下四个方面:1、本文选择I勘探区5勘探线开展了地电化学勘查有效性及方法技术条件试验。有效性试验结果表明,在见矿钻孔上方,地电化学勘查结果呈现出明显的成矿元素异常组合,说明地电化学方法在该矿区能够有效地指示深部矿体;提取条件试验结果表明,高密度泡塑载体物质(28kg/m3)电提取效果大大优于低密度泡塑(18kg/m3),低密度泡塑增加提取时间后提取效果变好,结合提取效率等因素,综合确定适用于本区的电提取条件为高密度泡塑载体,提取时间24小时。2、测区同时开展了地电化学和土壤地球化学测量。测量结果表明,依据本次提取条件试验结果所进行的地电化学测量优于土壤测量。地电化学测量能够有效地反映见矿钻孔Pb、Zn、Ag、As、Cd等多元素矿化异常。土壤测量仅能在出露区发现异常,受地形因素影响较大。3、抽稀试验表明,在东乌旗风成沙浅覆盖景观区,1点/km2面积性地电化学勘查可圈定找矿远景区,4点/km2即可较好的圈定找矿靶区,16点/km2可用于圈定矿体。4、本文开展了地电化学异常形成机理研究,将电提取后的泡塑在扫描电镜(SEM)下观察,发现大量的数微米-数十微米的粘土矿物颗粒,深部矿体中元素的电活动信息一部分与粘土矿物有关。
[Abstract]:In recent years, with the deepening of geological exploration work, the surface outcrop mines and shallow mines are decreasing year by year, and the prospecting in covered areas has become the focus of geological exploration work.The conventional geochemical prospecting method is not effective for the deeper deposit prospecting.Therefore, some unconventional geochemical prospecting techniques have been developed by domestic and foreign scholars to be applied to the exploration of mineral resources in covered areas.Geoelectrochemistry is one of the most widely used methods. Under the action of artificial applied electric field, the principle of geoelectrochemistry is to selectively extract the electroactive dynamic substance from the surface medium to the designated receiving electrode, and to study the combination of the electroextraction elements in the carrier.Content distribution and abnormal characteristics, and then provides a prospecting method for prospecting information.The Luokedun Pb-Zn polymetallic deposit in the working area of this paper is a typical concealed deposit. The ore area is located in the Dongwuqi integrated exploration area, which is a national key integrated exploration area. The deposit is still in the exploration stage, and there is no mining pollution.It is an ideal area to carry out geoelectrochemical exploration test.The research work includes four aspects as follows: 1. In this paper, the effectiveness and technical conditions of geoelectrochemical exploration are tested in the fifth exploration line in exploration area I.The results of effectiveness test show that the geochemical prospecting results show obvious association of ore-forming elements above the ore-forming boreholes, which indicates that the geoelectrochemical method can effectively indicate the deep orebodies in the mining area, and the results of extraction conditions test show that the geoelectrochemical method can effectively indicate the deep orebodies in the mining area.The electric extraction effect of high density foam plastic carrier material is much better than that of low density foam plastic carrier material (28 kg / m 3). The extraction effect of low density foam plastic is improved after the extraction time is increased, and the extraction efficiency is combined with factors such as extraction efficiency.The conditions suitable for electric extraction in this area were determined as high density foam carrier and extraction time of 24 hours. Geoelectrochemical and soil geochemistry measurements were carried out at the same time.The results show that the geoelectrochemical measurement based on the extraction conditions is better than the soil measurement.Geoelectrochemical measurements can effectively reflect the multi-element mineralization anomalies such as PBG, Zn, Ag, as, CD and so on.Soil survey can only find anomalies in the exposed area, which is greatly affected by topographic factors. The thinning test shows that,In Dongwuqi wind-sand shallow coverage landscape area of 1 / km ~ 2 geoelectrochemical exploration can be used to delineate ore-prospecting target area of 16 points / km ~ 2. In this paper, the formation mechanism of geoelectrochemical anomaly is studied, which can be used to delineate ore-bodies at 16 points / km ~ 2, which can be used to delineate orebody.A large number of micron-tens of micron clay mineral particles were observed under scanning electron microscope (SEM). The electrical activity information of elements in the deep ore body was partly related to clay minerals.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.2;P632

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