江苏省句容市伏牛山北部矿区铜矿成因及找矿勘查研究

发布时间：2019-06-20 09:47

【摘要】：伏牛山北部矿区铜多金属矿床是近年来发现的小型矿床,位于扬子地块下扬子台褶带坳陷中,主要产出于汤仑复背斜的北翼次级雷打山平卧向斜核部。矿体呈透镜状产于花岗闪长斑岩与二叠系栖霞组和三叠系青龙组碳酸盐岩外接触带中。本论文通过对伏牛山铜矿床矿体特征、矿物组成及矿石组构研究,确定矿床成因类型及找矿方向。通过电磁法、激电中梯法等物探手段,确定了有利的找矿靶区并进行了工程验证。本论文取得的主要成果如下:1.伏牛山北部矿区铜矿床呈透镜状产于花岗闪长斑岩与二叠系栖霞组和三叠系青龙组碳酸盐岩接触带中,矿体赋存在矽卡岩带中。2.矿石矿物组成研究表明,矽卡岩矿物主要有石榴子石、透辉石、阳起石、绿帘石、透闪石、绿泥石等,金属矿物有黄铜矿、黄铁矿,磁铁矿、磁黄铁矿、闪锌矿、方铅矿。3.伏牛山北部矿区铜矿床成矿作用方式以接触交代作用为主,本区矿床类型为矽卡岩型铜多金属矿床。4.成矿地质条件研究表明,花岗闪长斑岩(围岩)的接触带具有矽卡岩型铜矿化找矿潜力。5.在矿床地质特征综合分析的基础上,结合地球物理探测异常分析,圈定有力的找矿靶区,是十分有效的找矿方法。
[Abstract]:The copper polymetallic deposit in the northern part of the Volu Mountain is a small deposit discovered in recent years. It is located in the lower Yangtze platform-fold belt depression of the Yangtze block, which is mainly produced in the north wing of the Tang-un complex anticline. The ore body is formed in the outer contact zone of the granodiorite porphyry and the Permian and the Triassic Qinglong Formation. Based on the study of the ore body characteristics, the mineral composition and the ore structure of the copper deposit in the Voltaoshan copper deposit, the genetic type and the prospecting direction of the deposit are determined. The favorable prospecting target area is determined and the engineering verification is carried out by means of the electromagnetic method, the gradient method in the electric field and the like. The main results of this thesis are as follows:1. The copper deposit in the northern part of the Funiu Mountain is in the form of a lens, which is found in the carbonate contact zone of the granodiorite porphyry and the Permian and the Triassic Qinglong Formation. The study of the mineral composition of the ore shows that the minerals of the rock are mainly garnet, diopside, actinolite, epidote, tremolite, chlorite and so on. The metal minerals include chalcopyrite, pyrite, magnetite, pyrrhotite, sphalerite and galena. The ore-forming method of the copper deposit in the northern part of the Voltaoshan is dominated by the contact and cross-generation, and the type of the deposit in the area of the deposit is the type of the copper-polymetallic deposit of the tectonite type. The study of the ore-forming geological conditions shows that the contact zone of the flash-long porphyry (surrounding rock) has the potential for the exploration of the tectonite type copper ore. On the basis of the comprehensive analysis of the geological characteristics of the deposit, a strong prospecting target area is delineated by combining the geophysical exploration anomaly analysis, which is a very effective prospecting method.
【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.41

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