哈图金矿构造控矿机制研究

发布时间：2018-06-12 02:19

本文选题：哈图金矿 + 矿床特征　；参考：《新疆大学》2015年硕士论文

【摘要】：准噶尔西部是中亚成矿域的重要组成部分,具有复杂的地质构造格局和演化历史。哈图齐Ⅰ金矿是西准噶尔地区最大的金矿,最近几年的找矿勘探取得重大进展:在500~900m深部发现一些新矿体,且没有见到向下尖灭的迹象,显示金矿区深部有工业矿体存在的可能性,同时确认矿体的分布受断裂构造控制。1.区域内NE向主干断裂为金矿化的主要导矿构造,而次级NE、EW以及NW向断裂是主要的控矿构造。哈图断裂和安齐断裂之间的断裂带利于的金矿保存。2.矿区岩石的分布特征显示沉积环境侧向上的变化规律:西部为湖相环境;中部为湖相与陆相交互区域;中东部主要以陆相火山作用为主;东部靠近火山口,主要形成厚层玄武岩-薄层凝灰岩建造。3.L27脉组整体向东侧伏,沿侧伏方向由浅至深分布的三个主要矿脉为L27、L27-8和L27-14。根据已知控矿断裂和矿脉雁列式分布的特征,推测沿侧伏方向深部可能存在其他矿脉,它们将出现在控制L27脉群分布的EW向构造与安齐断裂的交汇处,并有所膨大。4.EW向断裂组在靠近安齐断裂附近逐渐转变为NEE向,根据辉绿岩锆石SHRIMP年代学研究说明这些岩脉和矿脉的断裂不是同时代形成的,是安齐断裂多期活动的结果。5.金矿化的时代与区域内花岗岩侵位的时代基本一致,与花岗质岩浆有关的富含金属元素的岩浆热液沿安齐断裂流动。迁移过程中,热液与下石炭统火山-沉积岩发生水岩反应,并萃取了金属成矿元素。根据迁移特征,建立哈图金矿的成矿模式示意图。
[Abstract]:The western Junggar is an important part of the Central Asian metallogenic domain, with complex geological structure and evolution history. The hutuqi I gold deposit is the largest gold deposit in West Junggar area, and in recent years, great progress has been made in prospecting and exploration. The discovery of some new ore bodies in the deep 500~900m has not seen any signs of downward cusp extinction, showing the depth of the gold deposit. There is the possibility of the existence of industrial orebodies, and it is confirmed that the distribution of the ore body is controlled by the fault structure in the.1. area and the main fault is the main ore conducting structure of the gold mineralization, while the secondary NE, EW and NW trending faults are the main ore controlling structures. The gold deposits of the fault zone between the HTU fault and the unqi fault are beneficial to the distribution of the rock in the.2. mining area. In the west, the western region is a lake facies environment, the central part is the lake facies and the continental facies, the Middle East is mainly continental facies volcanism, and the East is near the crater, the main formation of the thick basalt and TLC is the.3.L27 vein formation to the east side, and the direction from the shallow to the deep three main directions. The ore veins are L27, L27-8 and L27-14., according to the characteristics of the known ore control fracture and the distribution of the ore vein goose column, presumably there may be other veins in the deep side of the lateral volt direction, which will appear at the intersection of the EW direction structure and the inqi fault in the control of the distribution of the L27 vein group, and the expansion of the.4.EW direction fracture group gradually to the NEE direction near the inqi fault. According to the zircon SHRIMP chronology of diabase, the fracture of these veins and veins is not formed in the same epoch, it is the result of the multi period activity of an Qi Qi fault. The age of.5. gold mineralization is basically consistent with the age of granitic emplacement in the region, and the magma rich hydrothermal fluid, which is related to the granitic magma, flows along the unqi fault. During the process, the hydrothermal reaction with the lower Carboniferous volcanic sedimentary rocks and the metallogenic elements were extracted. According to the characteristics of the migration, a schematic diagram of the metallogenic model of the Hutu gold deposit was established.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.51

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