江西彭山矿田尖峰坡锡矿床成矿模式与成矿预测研究
发布时间：2018-09-17 12:58
【摘要】：尖峰坡锡矿床是江西省德安县彭山锡多金属矿田内一个大型锡矿床,前人已对该区开展了近50年的地质勘查和科研工作,并取得了许多重要成果。例如,基本查明了锡矿成矿物质主要来自含锡硅铝层岩石经部分熔融形成的含锡花岗质岩浆及其分异演化析出的含矿气液热流体；初步建立了晕圈式顺向分带成矿模式,即含矿热液沿层间滑动断裂水平运移,矿体呈晕圈式分布。然而,矿区内与成矿有关的花岗岩包括黑云母花岗岩和二云母花岗岩,究竟哪种花岗岩与成矿关系更为密切还不太清楚；此外,花岗岩提供锡等成矿物质的机制也不甚明了；再者,尖峰坡锡矿的形成是否存在含矿热液自下而上的垂直运移方式也值得进一步研究。针对上述问题,本次工作主要围绕尖峰坡锡矿的成矿物质来源和成矿构造控制因素等问题开展,目的是建立新的成矿模式,并在此基础上进行资源潜力评价和预测。在综合整理和分析前人资料基础上,本文对尖峰坡锡矿床重点开展了不同类型花岗岩岩相学与矿物化学以及蚀变与矿化特征等对比分析研究和可控源音频大地电磁测深(CSAMT)工作,取得了如下主要研究成果：1.尖峰坡矿区深部存在与彭山隐伏岩体同源的、与成矿关系密切的花岗质隐伏岩体,岩石类型包括黑云母二长花岗岩和二云母碱长花岗岩,其中二云母碱长花岗岩与成矿关系更为密切。在黑云母蚀变为白云母过程中释放了成矿物质。2.含矿热液自下而上的垂直运移方式为尖峰坡锡矿重要的成矿运移模式,F9深断裂及其次一级构造F10断裂组共同组成了垂直运移通道,是矿床形成的重要导矿、控矿构造。3.建立了尖峰坡锡矿床新的成矿模式,该模式揭示出彭山矿田不仅存在含矿热液水平运移,也存在垂直运移的成矿机制,补充和完善了彭山矿田综合成矿模式。4.根据尖峰坡锡矿新的成矿模式对矿区深部和外围进行了成矿潜力分析,明确了深部找矿方向和找矿层位,并提出了外围三个找矿靶区和资源整合建议,为尖峰坡锡矿提供了可延续矿山开采年限的接替矿产资源。
[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.
【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P618.44
，
本文编号：2245995
[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.
【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P618.44
，
本文编号：2245995
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