云南省金平县白乐寨铜矿区构造控矿特征及找矿预测研究

发布时间：2018-05-31 09:09

本文选题：铜矿床 + 矿床地质　；参考：《昆明理工大学》2015年硕士论文

【摘要】：云南省金平县白乐寨铜矿区,大地构造上位于扬子准地台与唐古拉—昌都—兰坪—思茅褶皱系两个一级构造单元的接触地带,紧邻哀牢山—藤条河大断裂西南侧,是哀牢山多金属成矿带南段藤条河多金属矿集区北西缘的一部分。受区域构造活动影响,哀牢山—藤条河地区经历了多期次的构造一岩浆活动,矿区变形活动强烈,而断裂构造是其最主要的表现形式,控制着区内矿体的产出与分布。本文在综合分析区域成矿地质背景、成矿地质条件的基础上,对区内不同等级、不同方向的断裂构造进行系统的归纳,初步总结了矿区的构造控矿特征,并结合对物化探等异常信息的综合分析,圈定了找矿靶区。论文主要取得了以下几个方面认识：(1)研究区铜矿体呈脉状、似层状赋存于断裂带内及旁侧裂隙中,其产出受地层(T3g1)、岩性(灰岩与砂质板岩的接触部位)、构造(NW及NNW向断层)、围岩蚀变(黄铁矿化、硅化、碳酸盐化等)、岩浆热液活动等多种因素控制,而构造是其中最主要的控矿因素(2)研究区的北西向断层与其上盘的次级北北西向断层组成“入”字型控矿构造型式,北西向断裂作为导矿构造,而其上盘的分支断裂作为容矿构造严格控制区内矿体的产出与分布。(3)结合矿体产出的空间赋存形态、控矿断裂构造特征和矿石矿物组合特征、围岩蚀变特征综合分析,认为该矿床成因为热液型铜矿床。(4)以研究区矿床地质特征及断裂构造控矿特征为基础,结合物、化探异常的分析结果及其他找矿标志,圈定2个找矿靶区。
[Abstract]:The Bailezhai copper deposit in Jinping County, Yunnan Province, is located in the contact zone between the Yangzi quasi platform and the two first-order tectonic units of the Tanggura-Changdu-Lanping-Simao fold system, adjacent to the southwest side of the Ailaoshan-Fujiahe large fault. It is a part of the northern western margin of the Fujiahe polymetallic ore concentration area in the southern section of the Ailaoshan polymetallic metallogenic belt. Influenced by the regional tectonic activities, the Ailaoshan-Fujiahe area experienced many periods of tectonic-magmatic activity, and the deformation of the mining area was strong, while the fault structure was the most important form, which controlled the production and distribution of orebodies in the area. Based on the comprehensive analysis of the regional metallogenic geological background and the metallogenic geological conditions, this paper systematically induces the fault structures of different grades and directions in the area, and preliminarily summarizes the structural ore-controlling characteristics of the mining areas. Combined with the comprehensive analysis of geophysical and geochemical anomaly information, the prospecting target area is delineated. In this paper, we have obtained the following understanding: the copper body in the study area is veined and stratiform, which occurs in the fault zone and in the lateral fissure. Its occurrence is controlled by various factors, such as formation T3g1, lithology (contact site between limestone and sandy slate, tectonic NW and NNW faults, wall rock alteration (pyrite, silicification, carbonization, etc.), magmatic hydrothermal activity, etc. The NW trending fault and the secondary NNW fault in its upper face form the "entering" type ore-controlling structure, and the NW-trending fault is used as the ore-conducting structure, and the structure is the most important ore-controlling factor in the study area. The branch faults in the upper face, as the production and distribution of orebodies in the strictly controlled area of ore-bearing structure, are combined with the spatial occurrence form of orebody production, the structural characteristics of ore-controlling faults, the characteristics of mineral assemblage and the alteration characteristics of surrounding rock. It is considered that the deposit is based on the geological characteristics of ore deposits and the ore-controlling characteristics of fault structures in the study area, and the analysis results of geochemical anomalies and other ore-prospecting indicators are the basis of the deposit formation. 2 ore-prospecting target areas are delineated.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.41

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