云南南涧地区水系沉积物地球化学特征及成矿远景预测

发布时间：2018-05-01 15:32

本文选题：水系沉积物 + 成矿远景　；参考：《成都理工大学》2015年硕士论文

【摘要】：工作区地处西南三江成矿带南段,属特提斯构造带的一部份,位于兰坪—思茅陆块与扬子陆块结合带。构造发育,岩浆活动频繁,矿化蚀变较强,成矿地质条件有利。研究区位于我国西部山区的云南南涧地区,资源丰富、金属成矿条件优越,主要成矿带基础地质调查与矿产勘查工作程度低,找矿潜力巨大。随着国家“西部大开发”和国务院“加强地质工作的决定”战略的实施,蕴藏着丰富矿产资源的云南地区已受到地质界的广泛关注。应用科学有效的化探数据处理方法来提取化探异常信息,在现代成矿预测理论的指导下,以GIS技术平台为支撑,通过集成地质、水系沉积物地球化学特征的研究等技术手段来快速准确地筛选评价化探找矿信息,并进行综合信息找矿预测,显然对该区的找矿勘查迅速取得突破、降低找矿风险具有十分重要的意义。工作区出露的地层有上三叠统麦初箐组;下侏罗统漾江组;中侏罗统花开左组,上侏罗统坝注路组;下白垩统景星组,上白垩统南新组;新近系三营组以及第四系全新统。本区断裂构造较为发育,主要以走向北西-南东向和北东-南西向为主,其中早期主要是北西-南东向断裂,晚期主要是北东-南西向断裂,断层主要为逆断层,倾向北东,倾角为26°-88°不等。测区岩浆岩分布较为集中,面积不大,但岩类简单;岩体分布于盟铺马村幅北部,构造位置正处于兰坪盆地“中央隆起带”,呈斑岩群产出,总体呈北西西向展布;总出露面积约为20km2。本次工作以1:5万水系沉积物为主,对Ag、As、Au、Be、Bi、Cd、Cu、Fe、Hg、La、Li、Mn、Mo、Pb、Sb、Sn、Ti、W、Y、Zn、Zr等21个元素进行了分析,共圈定单元素异常304处,其中Ag异常22处,As异常6处,Au异常18处,Be异常4处,Bi异常12处,Cd异常25处,Cu异常29处,Fe异常4处,Hg异常21处,La异常6处,Li异常11处,Mn异常31处,Mo异常24处,Pb异常19处,Sb异常9处,Sn异常2处,Ti异常4处,W异常7处,Y异常18处,Zn异常12处,Zr异常21处。并对HS01和HS03异常进行解释和评价。在对成矿元素的分布特征、相关性分析、R聚类分析的基础上,结合成矿地质条件、异常查证结果以及已有矿(化)点信息,作者认为工作区具寻找铜、铅、锌、银、金、锡、铁矿为主的多金属矿床或矿体的潜力。本文从水系沉积物地球化学特征入手,探讨了元素分布、分配特征,研究了元素R型聚类及相关性分析,分析了多元素组合特征,结合区域地质成矿背景及异常查证结果等进行了推断解译,对成矿进行预测。研究成果对指导该地区找矿具有重要的理论与实际意义。
[Abstract]:The working area is located in the southern section of the Sanjiang metallogenic belt in southwest China, which is a part of the Tethys tectonic belt and is located in the combination zone of the Lanping-Simao block and the Yangtze block. Tectonic development, frequent magmatic activity, strong mineralization and alteration, favorable geological conditions for mineralization. The study area is located in the Nanjian area of Yunnan Province in the western mountainous area of China. It is rich in resources and favorable for metallogenic conditions. The basic geological investigation and mineral exploration work of the main metallogenic belt is low and the prospecting potential is great. With the implementation of the strategy of "the great development of the western region" and the "decision to strengthen geological work" of the State Council, Yunnan, which is rich in mineral resources, has been widely concerned by the geological circles. Applying scientific and effective geochemical exploration data processing method to extract geochemical anomaly information, under the guidance of modern metallogenic prediction theory, supported by GIS technology platform, through the integration of geology, The study of geochemical characteristics of water system sediments and other technical means to quickly and accurately screen and evaluate geochemical prospecting information, and to carry out comprehensive information prospecting and prediction, it is obvious that the prospecting and exploration in this area has made a rapid breakthrough. It is very important to reduce the risk of prospecting. The strata exposed in the working area are the upper Triassic Maichuuqing formation, the Lower Jurassic Yangjiang formation, the Middle Jurassic Huazuo formation, the Upper Jurassic Bazuo formation, the Lower Cretaceous Tongjingxing formation, the Upper Cretaceous South New formation, the Neogene Sanying formation and the Quaternary New Series. The fault structures in this area are relatively developed, mainly in the NW-SE and NE-SE directions, in which the early faults are mainly NW-SE trending faults, the late faults are mainly NE-NW trending faults, the faults are mainly reverse faults and tend to be NNE. The inclination angle ranged from 26 掳to 88 掳. The magmatic rocks are distributed in the north of the Mupumacun massif, and are located in the "central uplift zone" of Lanping basin. The magmatic rocks are distributed in porphyry group and distributed generally in the NW direction. The total exposed area is about 20km2. In this work, 21 elements, such as 1: 50, 000 water system sediments, such as Ag-Asae, Astragalus, Beabe, CDB, CuPe, Fehg, LaLiMnMUN, PbSb, SbSN, TiWN, YZN, Zn-Zn-Zr, and so on, have been analyzed. 304 anomalous elements have been ordered in a common circle, and the results are as follows: (1) in this paper, There are 22 Ag anomalies, 6 as anomalies, 6 Bu anomalies, 18 be anomalies, 4 Bi anomalies, 12 CD anomalies, 25 Cu anomalies, 29 Cu anomalies, 4 HG anomalies, 21 La anomalies, 6 Li anomalies, 11 mn anomalies, 31 Mo anomalies, 24 Pb-Pb anomalies. 19 Sb anomalies 9 sn anomalies 2 Ti anomalies 4 W anomalies 7 Y anomalies 18 Zn anomalies 12 Zirconium anomalies 21 anomalies. HS01 and HS03 anomalies were interpreted and evaluated. On the basis of the distribution characteristics of metallogenic elements and correlation analysis / cluster analysis, combined with the metallogenic geological conditions, the results of abnormal verification and the information of existing ore (chemical) points, the authors think that the working area is suitable for searching for copper, lead, zinc, silver, gold, tin, etc. The potential of a polymetallic deposit or orebody dominated by iron ore. Based on the geochemical characteristics of river sediments, this paper discusses the distribution and distribution of elements, studies the cluster of elements R-type and their correlation analysis, and analyses the characteristics of multi-element assemblages. Combined with the regional geological metallogenic background and the results of abnormal verification and interpretation, the metallogenic prediction was carried out. The research results have important theoretical and practical significance for guiding the prospecting in this area.
【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】：P632;P612

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