云南易门铜厂铜矿床成矿规律与成矿预测研究
发布时间：2018-09-11 07:44
【摘要】：云南省易门铜厂矿床是易门铜矿带重要的矿床之一,位于扬子板块西南缘,昆阳裂谷武定一元江裂陷槽中部,中元古代易门断陷盆地西缘。易门铜矿经过多年的开采,面临着资源紧缺的危机。因此,开展易门矿区的深部及外围找矿,对完善和实践该区的找矿理论及矿山可持续发展,具有一定的理论和实际意义。本文在整理分析前人研究的基础上,结合实际的生产要求,通过野外地质调研,以及对区域成矿地质背景的深入研究,系统总结了区内地层层序、构造等地质特征。同时,根据铜矿的富集与分布特征,以铜厂矿区不同矿段为研究主体,分析总结其矿体地质特征。利用稳定同位素与矿区控矿因素的分析研究,总结区内矿化富集规律。在系统研究区内的见矿分布、控矿因素等基础上,应用地质与物化探相结合的方法,明确研究区的找矿标志,优选找矿靶区。通过对研究区域成矿地质背景、矿区地质特征等内容的深入研究,全面系统地论述了铜厂矿区铜矿床矿体地质特征,认为可将研究区的矿床(点)分为沉积成岩型(铜厂式)矿床和热液脉状型(大尖山式)矿床两种类型,前者明显受层位及岩性控制,主要呈层状、似层状产于落雪组二段灰白色硅质白云岩中,后者受断裂等构造的控制,在落雪组和鹅头厂组地层中均有出现。两种类型的矿体在矿化特征、矿物组成以及矿物组构特征等方面均有显著不同。稳定同位素研究表明,沉积成岩型矿体C、O同位素与围岩一致,其成矿物质主要来源于地层,硫同位素分析说明硫的主要来源为海水硫酸盐细菌还原硫；热液脉状矿的成矿物质则呈现出典型的深源特征。通过对硫化物组合及与实际地质情况的对比研究,得出矿化在垂向上的分带特性,同时,硫化物的结晶顺序,说明是在多期且不同的成矿作用下生成的。在此基础上,阐明了矿区内存在的叠加成矿作用,并根据矿化组合的不同,划分矿化类型区,总结其在空间上的分布规律。综合上述研究,结合前人对矿区地球物理、地球化学异常特征的分析,建立找矿标志,圈定三个找矿靶区,分别为20线以北大尖山式矿床找矿靶区、15—20线西北侧铜厂式矿床找矿靶区以及小马山找矿靶区。
[Abstract]:The Yimen copper deposit in Yunnan Province is one of the important deposits in the Yimen copper belt, located in the southwest margin of the Yangtze plate, in the central part of the Wuding-Yuanjiang rift trough in the Kunyang rift valley, and in the western margin of the middle Proterozoic Yimen fault depression basin. After many years of mining, Yimen Copper Mine is facing the crisis of resource shortage. Therefore, it is of theoretical and practical significance to carry out deep and peripheral prospecting in Yimen mining area to perfect and practice the prospecting theory and the sustainable development of mines in this area. In this paper, based on the analysis of previous studies, combined with the actual production requirements, through field geological investigation and in-depth study of the regional metallogenic geological background, the geological characteristics of the stratigraphic sequence and structure in the area are systematically summarized. At the same time, according to the enrichment and distribution characteristics of copper deposit, the geological characteristics of orebody are analyzed and summarized with different ore sections in Tongchang mine area as the main body. Based on the analysis of stable isotopes and ore-controlling factors in the mining area, the regularity of mineralization enrichment in the area is summarized. On the basis of ore-forming distribution and ore-controlling factors in the study area, using the method of combination of geology and geophysical and geochemical exploration, the prospecting criteria of the study area and the target area for optimal dressing and prospecting are determined. Based on the in-depth study of the regional metallogenic geological background and the geological characteristics of the mining area, the geological characteristics of the orebody of the copper deposit in Tongchang mining area are discussed comprehensively and systematically. It is considered that the deposits (points) in the study area can be divided into sedimentary diagenetic type (Tongchang type) deposit and hydrothermal vein type (Dajian mountain type) deposit. The former is obviously controlled by strata and lithology and is mainly layered. The stratiform appears in the grayish-white siliceous dolomite of the second member of the Luoxue formation, which is controlled by faults and other structures, and appears in both the Luoxue formation and the Yetouchang formation. There are significant differences between the two types of orebodies in mineralization characteristics, mineral composition and mineral fabric characteristics. The study of stable isotopes shows that the C _ (O) isotopes of sedimentary diagenetic orebodies are consistent with the surrounding rocks, and the ore-forming materials are mainly derived from the strata. The sulfur isotopic analysis shows that the main source of sulfur is the sulfate bacteria reducing sulfur in seawater. The ore-forming materials of hydrothermal vein ore show typical deep-source characteristics. Based on the comparison of sulphide assemblage and actual geological conditions, the zonation characteristics of mineralization in vertical direction are obtained. At the same time, the crystallization order of sulphide shows that it was formed under multi-period and different mineralization. On this basis, the superposition mineralization in the mining area is clarified, and according to the different mineralization assemblage, the mineralization type area is divided, and its distribution law in space is summarized. Based on the above research, combined with the analysis of geophysical and geochemical anomaly characteristics of ore area by predecessors, the prospecting criteria were established and three prospecting targets were delineated. They are the prospecting target area of Dajianshan type deposit in the north of line 20 and the prospecting target area of Tongchang type deposit on the west and north side of line 15-20 and the prospecting target area of Xiaomashan.
【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
本文编号：2236054
[Abstract]:The Yimen copper deposit in Yunnan Province is one of the important deposits in the Yimen copper belt, located in the southwest margin of the Yangtze plate, in the central part of the Wuding-Yuanjiang rift trough in the Kunyang rift valley, and in the western margin of the middle Proterozoic Yimen fault depression basin. After many years of mining, Yimen Copper Mine is facing the crisis of resource shortage. Therefore, it is of theoretical and practical significance to carry out deep and peripheral prospecting in Yimen mining area to perfect and practice the prospecting theory and the sustainable development of mines in this area. In this paper, based on the analysis of previous studies, combined with the actual production requirements, through field geological investigation and in-depth study of the regional metallogenic geological background, the geological characteristics of the stratigraphic sequence and structure in the area are systematically summarized. At the same time, according to the enrichment and distribution characteristics of copper deposit, the geological characteristics of orebody are analyzed and summarized with different ore sections in Tongchang mine area as the main body. Based on the analysis of stable isotopes and ore-controlling factors in the mining area, the regularity of mineralization enrichment in the area is summarized. On the basis of ore-forming distribution and ore-controlling factors in the study area, using the method of combination of geology and geophysical and geochemical exploration, the prospecting criteria of the study area and the target area for optimal dressing and prospecting are determined. Based on the in-depth study of the regional metallogenic geological background and the geological characteristics of the mining area, the geological characteristics of the orebody of the copper deposit in Tongchang mining area are discussed comprehensively and systematically. It is considered that the deposits (points) in the study area can be divided into sedimentary diagenetic type (Tongchang type) deposit and hydrothermal vein type (Dajian mountain type) deposit. The former is obviously controlled by strata and lithology and is mainly layered. The stratiform appears in the grayish-white siliceous dolomite of the second member of the Luoxue formation, which is controlled by faults and other structures, and appears in both the Luoxue formation and the Yetouchang formation. There are significant differences between the two types of orebodies in mineralization characteristics, mineral composition and mineral fabric characteristics. The study of stable isotopes shows that the C _ (O) isotopes of sedimentary diagenetic orebodies are consistent with the surrounding rocks, and the ore-forming materials are mainly derived from the strata. The sulfur isotopic analysis shows that the main source of sulfur is the sulfate bacteria reducing sulfur in seawater. The ore-forming materials of hydrothermal vein ore show typical deep-source characteristics. Based on the comparison of sulphide assemblage and actual geological conditions, the zonation characteristics of mineralization in vertical direction are obtained. At the same time, the crystallization order of sulphide shows that it was formed under multi-period and different mineralization. On this basis, the superposition mineralization in the mining area is clarified, and according to the different mineralization assemblage, the mineralization type area is divided, and its distribution law in space is summarized. Based on the above research, combined with the analysis of geophysical and geochemical anomaly characteristics of ore area by predecessors, the prospecting criteria were established and three prospecting targets were delineated. They are the prospecting target area of Dajianshan type deposit in the north of line 20 and the prospecting target area of Tongchang type deposit on the west and north side of line 15-20 and the prospecting target area of Xiaomashan.
【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
【参考文献】
相关期刊论文 前4条
1 韩润生,刘丛强,孙克祥,马德云,李元;易门式铜矿床的多因复成成因[J];大地构造与成矿学;2000年02期
2 郭文魁;常印佛;黄崇轲;;我国主要类型铜矿成矿和分布的某些问题[J];地质学报;1978年03期
3 王之田;秦克章;;中国铜矿床类型、成矿环境及其时、空分布特点[J];地质学报;1988年03期
4 张学诚，，马丽华，陈启良;东川稀矿山铜（铁）矿床火山—喷流沉积成矿作用的初步研究[J];云南地质;1994年02期
相关博士学位论文 前1条
1 王雷;云南易门凤山铜矿床刺穿体构造及隐伏矿定位预测研究[D];昆明理工大学;2010年
相关硕士学位论文 前1条
1 张志;广西佛子冲铅锌矿深部找矿预测研究[D];中国地质大学（北京）;2006年
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