重庆修齐锰矿床成矿模式研究

发布时间：2018-06-02 05:18

本文选题：修齐 + 锰矿　；参考：《成都理工大学》2015年硕士论文

【摘要】：锰是钢铁冶炼行业重要的资源,同时是一种重要的国际战略资源。我国的锰矿以沉积型为主,与世界主要锰矿国家类似。热液锰矿较少,而且规模校小,经济意义不大。重庆是我国五大锰矿产出地之一,位于城口的修齐锰矿床是当地锰矿床典型的例子。修齐锰矿床位于著名的城巴磷锰矿带东段,同时是秦岭造山带和上扬子陆块北缘的交界处。本文以修齐锰矿床为主要研究对象,以成矿地质作用特征研究、矿区地质构造研究、矿床地质特征、矿体地质特征与矿床地球化学研究为重点研究内容,进行系统的探讨成矿环境、成矿物质来源、控矿因素,建立成矿模式图。通过室内外综合研究,本文取得了一下主要认识及成果:1、通过区域地质特征研究发现,区域上最重要的地层是震旦系和寒武系的地层,并且矿床产出在震旦系陡山沱组地层。2、锰矿石的矿石矿物为菱锰矿,脉石矿物为高岭石、白云石、方解石等。矿石的结构主要有细—中粒和球粒结构,构造主要有条带、条纹状、块状构造。矿石主要为原生贫锰矿石。3、微量元素特征参数分析和图解结果表示,矿床的形成受到强烈的热水流体的影响,成矿物质的来源不具有唯一性,沉积环境为缺氧的还原环境。4、稀土元素特征参数分析和图解结果表明,Ce有明显的负异常,矿床的形成是在一个海洋盆地中,并且沉积并非正常的海水沉积,有热水沉积作用影响。5、矿床具有典型的时控性和层控性,受到古地理环境、岩性岩相以及构造的影响。
[Abstract]:Manganese is not only an important resource of iron and steel smelting industry, but also an important international strategic resource. The manganese deposits in China are mainly sedimentary type, similar to the major manganese ore countries in the world. The hydrothermal manganese ore is less, and the scale is small, so it is of little economic significance. Chongqing is one of the five major manganese ore producing places in China. The Xiuqi manganese deposit in Chengkou is a typical example of the local manganese ore deposit. The Xiuqi manganese deposit is located in the eastern section of the famous Chengba Phosphate ore belt and is the junction of the Qinling orogenic belt and the northern margin of the upper Yangtze block. In this paper, the main research object is Xiuqi manganese deposit, with the study of ore-forming geological characteristics, geological structure of ore area, geological characteristics of ore deposit, geological characteristics of orebody and geochemistry of ore deposit as the emphases. The metallogenic environment, ore-forming source, ore-controlling factors and metallogenic model map are discussed systematically. Through the indoor and outdoor comprehensive study, this paper has obtained the main knowledge and achievement: 1. Through the study of the regional geological characteristics, it is found that the most important strata in the region are the strata of the Sinian and Cambrian. The ore minerals of manganese ore are rhodochrosite, gangue minerals are kaolinite, dolomite, calcite and so on. The structure of ore mainly consists of fine-medium-grain and spherical-grained structures with striped and massive structures. The ore is mainly primary manganese ore. The trace element characteristic parameter analysis and graphic results show that the formation of ore deposit is influenced by the strong hot water fluid, and the source of the ore-forming material is not unique. The depositional environment is anoxic reductive environment .4.The REE characteristic parameter analysis and graphic results show that the ce has obvious negative anomaly, the deposit is formed in an ocean basin, and the deposit is not a normal seawater deposit. The deposit is influenced by hot water deposition. The deposit has typical temporal and stratigraphic characteristics and is influenced by paleogeographic environment, lithologic lithofacies and structure.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.32

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