西藏铁格隆南铜（金）矿床矿体特征

发布时间：2018-06-07 13:25

本文选题：找矿探讨 + 矿体特征　；参考：《成都理工大学》2015年硕士论文

【摘要】：西藏铁格隆南铜(金)矿床是西藏发现的首个典型浅成低温热液矿床,在近两年开展商业勘查之后才发现的特大型矿床。笔者在参加该矿区科研和生产项目过程中,对部分钻孔进行了详细的科研编录,进行矿区的野外地质调查和基础填图工作,对矿区的基本地质特征有了较为详细的了解,因此选择该矿床进行论文撰写。文章主要探讨以下内容:(1)矿体基本特征,包括矿体形态、产状和规模;(2)矿体的矿化特征,包括矿石组构、矿物组合;(3)矿体与其他地质体的关系,包括矿体与花岗闪长斑岩和石英闪长玢岩、矿体与安山岩、矿体与长石石英砂岩等的关系;(4)该矿床与其他同类型矿床特征;(5)矿体指示成矿物质来源方向。论文编写过程中绘制中段平面图探讨矿体的垂向大致变化,宏观和镜下照片确定矿石组构和矿物组合,铜元素等值线图确定矿体、高品位矿体形态、产状,铜元素等值线图探讨矿体与其他地质体关系。文章对主要内容的研究,得出如下结论:(1)矿体形态为略倾斜的近柱状体,平面投影大致呈椭圆形,矿体倾向为南东方向150°左右,倾角约80°。(2)整个矿床的赋矿岩石主要为长石石英砂岩和花岗质岩体,岩体规模较小,地表盖层安山岩不含矿且与下伏岩石界线清晰。其他地质体与矿体的关系主要表现为石英闪长玢岩和花岗闪长斑岩大部分含矿,长石石英砂岩为主要赋矿岩石,安山岩不含矿。花岗闪长斑岩和石英闪长玢岩与成矿关系密切;长石石英砂岩为成矿提供了空间;虽然安山岩不含矿,但是为矿体的保存提供了良好的盖层。(3)通过该类型矿床对比,此类矿床矿种以铜、金为主,推测该矿床或附近仍有寻找金矿的潜力。(4)根据矿体的形态和高品位矿体特征,初步确定成矿物质来自南东方向,矿体中心在钻孔ZK2404附近,且厚度较大,靠近中心的多个钻孔下部矿体品位较好,说明深部成矿潜力较大;南西方向钻探工程未完全控制,仍有较好的找矿潜力。
[Abstract]:The Tiegelongnan copper (gold) deposit in Tibet is the first typical epithermal deposit discovered in Tibet. In the course of participating in the scientific research and production project of the mining area, the author has made detailed scientific research catalogs on some boreholes, carried out the field geological survey and basic mapping work of the mining area, and has a more detailed understanding of the basic geological characteristics of the mining area. Therefore, the deposit is selected for writing the paper. This paper mainly discusses the basic features of the orebody, including the shape, occurrence and scale of the orebody, including the ore fabric, the relationship between the orebody and other geological bodies. The relationship between orebody and granodiorite porphyry and quartz diorite porphyry, orebody and andesite, orebody and feldspar quartz sandstone. In the process of compiling the paper, the vertical variation of ore body is discussed by drawing the plan of middle section, the ore fabric and mineral assemblage are determined by macroscopic and microscopic photographs, the ore body is determined by contours of copper element, the shape and occurrence of high grade ore body is determined. The relationship between ore bodies and other geological bodies is discussed in the contour map of copper element. The main contents of the paper are as follows: (1) the orebody is a slightly inclined near columnar body, the plane projection is approximately elliptical, and the orebody tends to be about 150 掳from the south to the east. The ore-bearing rocks of the whole deposit are mainly feldspar quartz sandstone and granitic rock mass, the scale of the rock body is relatively small, and the surface caprock andesite contains no ore and has a clear boundary with the underlying rock. The relationship between other geological bodies and orebodies mainly shows that most of the quartz diorite porphyry and granodiorite porphyry are ore-bearing, feldspar quartz sandstone is the main ore-bearing rock, andesite is not ore-bearing. Granodiorite porphyry and quartz diorite porphyrite are closely related to mineralization; feldspar quartz sandstone provides space for mineralization; although andesite does not contain ore, it provides a good caprock for the preservation of orebody. The ore types of this kind of deposit are mainly copper and gold. It is speculated that the ore deposit or nearby still has the potential of gold prospecting. (4) according to the shape of ore body and the characteristics of high grade orebody, it is preliminarily determined that the ore-forming material comes from the direction of south to east, and the orebody center is near the borehole ZK2404. The thickness is large and the ore bodies in the lower part of several boreholes near the center have better grade, which indicates that the deep ore-forming potential is great, and the drilling project in the south-west direction is not completely controlled, so it still has good prospecting potential.
【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;P618.51

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