云南保山凤庆地区成矿地质背景分析

发布时间：2018-06-15 21:22

本文选题：云南保山 + 成矿地质背景　；参考：《成都理工大学》2017年硕士论文

【摘要】：云南保山地区位于冈瓦纳大陆大陆与劳亚大陆之间的昌宁孟连带上。研究区出露地层主要有施甸地层小区、耿马地层小区、澜沧地层小区三个小区,从奥陶系至新近系地层皆有出露;岩浆岩以古特提斯构造域被动陆缘一侧的澜沧构造岩浆带矿物为代表,其分布明显受断裂控制,从岩浆岩类型上看,区内岩浆岩以二叠系、三叠系二长花岗岩和二叠系闪长岩为主,次为石英闪长岩和花岗闪长岩。火山岩主要出露于保山-镇康地块和昌宁-孟连带内,总体呈南-北或近南北向的狭长带状展布;研究区的变质岩石类型主要为区域动力热流和区域热流动力两个大类,变质岩出露基岩以变质砂岩类、千枚岩类、片岩类为主。区内发育岩浆岩建造、火山岩建造、变质岩建造、碎屑岩建造。已发现的与岩浆岩建造有关的矿物有凤庆幅的辉钼矿、铜矿、硅石矿等,与变质岩建造有关的矿物有勐统街幅的硫铁矿、铜矿、铅锌矿;与火山岩建造有关的卧牛寺玄武岩铜矿,与碎屑岩建造有关的石门坎金矿及凤庆勐佑河尾村张家煤矿,研究区矿产的形成与分布均与含矿建造有着密切的关系。综合三江地区的成矿地质特点,通过对研究区矿产成矿规律、控矿因素进行综合、归纳、分析、研究,最终总结出研究区矿产控矿因素:(1)地层,杞木石门坎金矿及凤庆勐佑河尾村张家煤矿严格控制于地层层位中;(2)构造控矿,控制了含矿建造的形成及其背景,同时也决定导矿、运矿、容矿,凤庆幅的钼矿、铜矿、硅石矿、硫铁矿严格受构造控制,矿点发现位置皆位于构造周边;(3)岩浆岩,岩浆活动多为成矿物质直接来源,同时也为热液活动提供动力,凤庆地区的发现了辉钼矿、硫铁矿、铜矿矿点充分说明了岩浆热液的作用。最终通过对研究区内的成矿地质背景、含矿建造、构造、成矿因素、控矿因素进行综合分析,总结研究区内矿产特征,划定了三个具有找矿潜力的成矿区:杞木林铅锌矿成矿区;字家寨钼矿成矿区;田头村铜多金属矿成矿区。
[Abstract]:Baoshan area is located in the Changning Menglian belt between Gondwana and Laoya. In the study area, there are three main outcrop strata: Shidian stratigraphic district, Gengma stratigraphic district and Lancang stratigraphic district, which are exposed from Ordovician to Neogene. The magmatic rocks are represented by the minerals in the Lancang tectonic magmatic belt on the passive margin of the PaleoTethys tectonic domain. The distribution of magmatic rocks is obviously controlled by faults. In terms of magmatic rock types, the magmatic rocks in the area are Permian. Triassic Permian granites and Permian diorite are dominant, followed by quartz diorite and granodiorite. The volcanic rocks are mainly exposed in the Baoshan-Zhenkang block and Changning Menglian belt, and are generally distributed in a long, narrow and narrow belt in the south-north direction or near the north-south direction. The metamorphic rock types in the study area are mainly regional dynamic heat flow and regional heat flow dynamics, the main types of metamorphic rocks in the study area are regional dynamic heat flow and regional heat flow dynamics. Metamorphic rocks are mainly composed of metamorphic sandstone, phyllite and schist. Magmatic formation, volcanic formation, metamorphic rock formation, clastic formation. The minerals related to magmatic formation are molybdenum, copper and siliceous ore of Fengqing range, and pyrite, copper and lead-zinc ore related to metamorphic rock formation. The formation and distribution of minerals in the study area are closely related to ore-bearing formations, such as the Huuniusi basalt copper deposit related to volcanic rock formation, the Shimenkan gold deposit related to clastic rock formation and Zhangjia coal mine in Fengqing Mengyou River Weicun. Synthesizing the ore-forming geological characteristics of Sanjiang area, by synthesizing, summing up, analyzing and studying the ore-controlling factors, the ore-controlling factor of ore-controlling in the study area, the ore-controlling factor of the studied area, the ore-controlling factor: 1) is concluded. Qimenqian gold deposit and Zhangjia coal mine in Fengqing Mengyou River Weicun (Zhangjia coal mine) are strictly controlled in the stratigraphic strata, controlling the formation of ore-bearing formations and their background, and also determining the ore-conducting, transporting, containing, and Fengqing molybdenum deposits and copper deposits. Siliceous ores and pyrite are strictly controlled by the structure. The location of the ore sites is located in the adjacent area of the structure. Magmatic activity is mainly from the direct source of ore-forming materials, and it also provides power for hydrothermal activities. Molybdenum and pyrite have been discovered in Fengqing area. The ore spot of copper deposit fully illustrates the action of magmatic hydrothermal solution. Finally, through the comprehensive analysis of metallogenic geological background, ore-bearing formation, structure, ore-forming factors and ore-controlling factors in the study area, the characteristics of mineral resources in the study area are summarized. There are three metallogenic areas with prospecting potential: Qimulin lead-zinc deposit, Zijiazhai molybdenum deposit and Tiantoucun copper-polymetallic ore deposit.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P612

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