【摘要】：尖峰坡錫礦床是江西省德安縣彭山錫多金屬礦田內一個大型錫礦床,前人已對該區(qū)開展了近50年的地質勘查和科研工作,并取得了許多重要成果。例如,基本查明了錫礦成礦物質主要來自含錫硅鋁層巖石經部分熔融形成的含錫花崗質巖漿及其分異演化析出的含礦氣液熱流體；初步建立了暈圈式順向分帶成礦模式,即含礦熱液沿層間滑動斷裂水平運移,礦體呈暈圈式分布。然而,礦區(qū)內與成礦有關的花崗巖包括黑云母花崗巖和二云母花崗巖,究竟哪種花崗巖與成礦關系更為密切還不太清楚；此外,花崗巖提供錫等成礦物質的機制也不甚明了；再者,尖峰坡錫礦的形成是否存在含礦熱液自下而上的垂直運移方式也值得進一步研究。針對上述問題,本次工作主要圍繞尖峰坡錫礦的成礦物質來源和成礦構造控制因素等問題開展,目的是建立新的成礦模式,并在此基礎上進行資源潛力評價和預測。在綜合整理和分析前人資料基礎上,本文對尖峰坡錫礦床重點開展了不同類型花崗巖巖相學與礦物化學以及蝕變與礦化特征等對比分析研究和可控源音頻大地電磁測深(CSAMT)工作,取得了如下主要研究成果：1.尖峰坡礦區(qū)深部存在與彭山隱伏巖體同源的、與成礦關系密切的花崗質隱伏巖體,巖石類型包括黑云母二長花崗巖和二云母堿長花崗巖,其中二云母堿長花崗巖與成礦關系更為密切。在黑云母蝕變?yōu)榘自颇高^程中釋放了成礦物質。2.含礦熱液自下而上的垂直運移方式為尖峰坡錫礦重要的成礦運移模式,F9深斷裂及其次一級構造F10斷裂組共同組成了垂直運移通道,是礦床形成的重要導礦、控礦構造。3.建立了尖峰坡錫礦床新的成礦模式,該模式揭示出彭山礦田不僅存在含礦熱液水平運移,也存在垂直運移的成礦機制,補充和完善了彭山礦田綜合成礦模式。4.根據尖峰坡錫礦新的成礦模式對礦區(qū)深部和外圍進行了成礦潛力分析,明確了深部找礦方向和找礦層位,并提出了外圍三個找礦靶區(qū)和資源整合建議,為尖峰坡錫礦提供了可延續(xù)礦山開采年限的接替礦產資源。
[Abstract]:Jianfengpo tin deposit is a large tin deposit in Pengshan tin polymetallic ore field in Dean County Jiangxi Province. The predecessors have carried out geological exploration and scientific research in this area for nearly 50 years and obtained many important achievements. For example, it is basically found that the tin ore-forming material mainly comes from tin bearing granitic magma formed by partial melting of tin silica-aluminum layer rock and the hydrothermal fluid of gas-bearing fluid precipitated by its differentiation evolution, and a halo-circle converse zoning metallogenic model has been established preliminarily. The ore-bearing hydrothermal fluid moves horizontally along interlaminar sliding faults and the orebody distributes in halo circles. However, it is not clear which granites are closely related to mineralization, including biotite granite and dimicite granite, and the mechanism of granites providing tin and other minerals is not clear. Furthermore, whether there is vertical migration of hydrothermal solution from bottom to top in the formation of Jianfengpo tin deposit is worth further study. In view of the above problems, this work mainly focuses on the source of ore-forming material and the controlling factors of ore-forming structure in Jianfeng Poe tin deposit. The purpose of this work is to establish a new metallogenic model, and on this basis to evaluate and predict the potential of resources. On the basis of comprehensive analysis and analysis of previous data, this paper focuses on the comparative analysis of different types of granite lithofacies and mineral chemistry, alteration and mineralization characteristics, and controlled source Audio magnetotelluric sounding (CSAMT) work for the Jianfeng Po tin deposit. The main research results are as follows: 1. In the deep part of Jianfeng slope mining area, there are granitic cryptonites of the same origin and close relation with the Pengshan concealed rock mass. The rock types include biotite monzogranite and dimica alkali feldspar granite, and the rock types include biotite monzogranite and dimica alkali feldspar granite. The dimica alkali feldspar granite is more closely related to mineralization. In the process of biotite erosion to Muscovite, the ore-forming material was released. 2. The vertical migration of ore-bearing hydrothermal solution from bottom to top is an important ore-forming migration model of Jianfeng Po tin deposit. The deep fault of F _ 9 and its sub-first-order structure F _ 10 fault group together form a vertical migration channel, which is an important ore-guide for the formation of ore deposit, and the ore-controlling structure is .3. A new metallogenic model of Jianfengpo tin deposit has been established, which reveals that there are not only horizontal migration of ore-bearing hydrothermal in Pengshan ore field, but also metallogenic mechanism of vertical migration, which complements and perfects the comprehensive metallogenic model of Pengshan ore field .4. According to the new metallogenic model of Jianfengpo tin deposit, the metallogenic potential of deep and peripheral ore area is analyzed, and the direction and horizon of deep prospecting are defined, and the suggestions of three prospecting target areas and resource integration in the periphery are put forward. It provides the replacement mineral resources for the mining life of Jianfeng Poe tin mine.
【學位授予單位】：南京大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：P618.44
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本文編號：2245995