西藏多龙矿集区激电中梯方法有效性评价

发布时间：2018-03-22 02:29

本文选题：多龙矿集区　切入点：激电中梯　出处：《成都理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：多龙矿集区北部属南羌塘-他念它翁复合地体带西段南缘,中部属班公湖-怒江结合带西段,南部属冈底斯陆块西段北缘。地层为下侏罗统曲色组(J1q)、下-中侏罗统色哇组(J1-2s)、下白垩统美日切组(K1m),以及古近系渐新统康托组(E3k)、第四系(Q)。基性侵入岩为辉绿岩,中酸性侵入岩以花岗闪长斑岩为主。重点研究矿区矿种类型均为铜金矿。对波龙、多不杂、拿若三个矿区所做的激电中梯剖面进行整理解析,结合钻孔编录成果,对该方法的示矿、示岩性进行分析研究。共解析激电中梯剖面14条:首先对三个矿区视电阻率、视极化率值的大小进行分段统计,将矿(岩)体部位的视电阻率、视极化率值与非矿(岩)体部位的值进行对比,未发现视电阻率、视极化率值有明显异常存在。其次,对各类型视电阻率、视极化率曲线组合进行分析对比,包括“高视电阻率、低视极化率”,“低视电阻率、高视极化率”,“高视电阻率、高视极化率”,“低视电阻率、低视极化率”,视电阻率“两高夹一低”和“两低夹一高”,视极化率“两高夹一低”和“两低夹一高”这6大类。通过将这6类信息特征曲线与钻探工程见矿、见岩情况的对比后发现:①在曲线类型相同,并且ρs、ηs值相近的情况下,有存在矿(岩)体的情况,也有无矿(岩)体的情况。②在曲线类型相同,并且ρs、ηs值相差较大的情况下,有存在矿(岩)体的情况,也有无矿(岩)体的情况。③在曲线类型不同,并且ρs、ηs值相近的情况下,有存在矿(岩)体的情况,也有无矿(岩)体的情况。④在曲线类型不同,并且ρs、ηs值相差较大的情况下,有存在矿(岩)体的情况,也有无矿(岩)体的情况。⑤在少数剖面中存在一些较有规律的变化特征,但并不具备普遍性。⑥虽有一些信息标志在见矿(岩)体部位出现频率较高,但并不具有排他性。此外,针对矿体、岩体埋深问题,笔者做了初步探讨,发现激电中梯方法在对矿体、岩体埋深情况进行判别时,无法从测量数据或数据组合规律上判定矿体、岩体的埋深深度。综合以上研究成果,激电中梯方法对多龙矿集区Cu、Au矿床勘查无排他性标志。
[Abstract]:The northern part of the Dulong ore concentration area is the southern margin of the western section of the southern Qiangtang-Tantaoweng complex terrane belt, and the middle subordinate is the western section of the Bangong Lake-Nujiang junction belt. The south part belongs to the northern margin of the western section of the Gangdis block. The strata are the lower Jurassic Kuchse formation, the Lower and Middle Jurassic Sewa formation, the Lower and Middle Jurassic Sewa formation, the Lower Cretaceous Meiriche formation, the Paleogene Cambrian Cambrian formation, the Paleogene Cambrian Kantuo formation, the Quaternary Quaternary QKG, and the basic intrusive rocks are diabase rocks. The intermediate-acid intrusive rocks are mainly granodiorite porphyry. The ore types in the mining area are all copper and gold deposits. In this paper, the ore indication and lithology of this method are analyzed and studied. There are 14 sections in the middle ladder section of IP: firstly, the apparent resistivity and apparent polarizability of the three mining areas are divided into sections, and the apparent resistivity of the ore (rock) body is calculated. When the apparent polarizability value is compared with the value of non-mineral (rock) body, there is no apparent resistivity and apparent polarizability is obviously abnormal. Secondly, the combination of apparent resistivity and apparent polarizability curve is analyzed and compared. Including "high apparent resistivity, low apparent polarizability", "low apparent resistivity, high apparent polarizability", "high apparent resistivity, high apparent polarizability", "low apparent resistivity", "low apparent polarizability", "two high and one low" and "two low and one high", six categories of apparent polarizability, "two high and one low" and "two low and one high". The comparison of rock and rock conditions shows that when the curve type is the same, and 蟻 s, 畏 s values are similar, there are ore (rock) bodies and ore (rock) bodies with the same curve types, and the difference of 蟻 s and 畏 s values is quite large in the case that there are ore (rock) bodies, and there is no ore (rock) bodies in the case of the same curve type, and the difference of 蟻 s and 畏 s values is large. There are ore (rock) bodies, and there are mineral (rock) bodies. .3 in the case of different curve types and similar 蟻 s, 畏 s values, there are ore (rock) bodies, and there are mineral (rock) bodies with or without ore (rock) bodies. And when 蟻 s, 畏 s values differ greatly, there are ore (rock) bodies and ore (rock) bodies. 5. There are some more regular variation characteristics in a few sections. However, although there are some information signs which appear frequently in the ore body (rock) body, they are not exclusive. In addition, the author has made a preliminary discussion on the buried depth of ore body and rock mass. It is found that the depth of ore body and rock mass can not be determined from the measurement data or the law of data combination when the method of induced electric medium ladder is used to judge the buried depth of ore body and rock mass. There is no exclusive sign for the exploration of the Cu-au au deposit in the Dulong ore concentration area by using the method of induced electric medium ladder.
【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】：P631.324

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