东秦岭骆驼山多金属硫铁矿地质特征与控矿模式探讨

发布时间：2018-05-19 02:29

本文选题：骆驼山 + 硫铁矿　；参考：《中国地质大学(北京)》2015年硕士论文

【摘要】：东秦岭骆驼山多金属硫铁矿位于华北克拉通最南端,它衔接了卢氏—确山构造带以及北秦岭板内增生带,是栾川南泥湖大型钼矿田中一个典型的多金属硫铁矿床,研究该矿床的成矿作用对于区域上寻找类似矿床有着重要意义。本文全面收集前人的最新研究成果,在野外地质调查及室内资料综合分析的基础上,总结研究区成矿地质特征及控矿因素,并指出下部探矿的大致方向。通过野外地质工作与室内综合整理,基本查明了骆驼山矿区主要的矿区构造、地层、岩浆岩等地质特征;多金属硫铁矿及脉状铅锌矿的矿体特征、矿石特征,及矿床的围岩蚀变等。通过资料分析对比,大致确定出矿床的控制因素。上房沟花岗岩体为矿床形成提供了主要的物质来源和热源;褶皱形成的张性断裂带,往往给矿液渗透和交代提供了通道和沉淀的场所,为浅部局部厚大矿体的形成提供了有利的条件,围岩裂隙的发育,利于矿液充填交代;矿床形成与三川组地层存在一定的联系,地层成矿物质的初步富集为矿床形成提供了部分物质来源。通过资料分析对比,大致了矿床的成矿作用及成矿时限,大致推测矿床成矿作用应当发生于大致140Ma左右的早白垩世构造—岩浆—成矿流体作用。初步建立了成矿模型,指出矿山下部探矿的方向,即Ⅰ号多金属硫铁矿体及脉状铅锌矿体的深部,为矿山可持续发展提供依据。
[Abstract]:The East Qinling Luohushan polymetallic pyrite is located at the southernmost tip of the North China Craton. It is a typical polymetallic pyrite deposit in the large scale molybdenum ore field of NanNihu in Luanchuan, which connects the Lush-Queshan tectonic belt and the North Qinling intraplate accretive zone. It is important to study the mineralization of the ore deposit for finding similar deposits in the region. On the basis of field geological survey and comprehensive analysis of indoor data, this paper summarizes the ore-forming geological characteristics and ore-controlling factors in the study area, and points out the general direction of the lower exploration. Through field geological work and indoor comprehensive arrangement, the geological characteristics of main mining area structures, strata, magmatic rocks, ore bodies and ore characteristics of polymetallic pyrite and vein lead-zinc deposits are basically identified. And the alteration of the surrounding rock of the deposit. Through the analysis and comparison of the data, the controlling factors of the deposit are roughly determined. The Shangfanggou granite body provides the main material source and heat source for the formation of the ore deposit, and the extensional fault zone formed by the fold often provides the passage and the place for the deposit to permeate and replace the ore solution. It provides favorable conditions for the formation of shallow local thick large orebodies, the development of surrounding rock fissures and the filling and metasomatism of ore fluids, and the formation of the deposits is related to the strata of Sanchuan formation. The preliminary enrichment of the ore-forming materials provides a part of material source for the formation of the deposit. Through the analysis and comparison of the data, the metallogenic process and metallogenic time period of the deposit are roughly discussed, and it is inferred that the mineralization of the deposit should take place in the early Cretaceous tectonic-magmatic ore-forming fluid about 140Ma. A preliminary metallogenic model was established, and the direction of prospecting in the lower part of the mine, I. e., the deep part of the No. 1 polymetallic pyrite body and the vein type lead-zinc ore body, was pointed out, which provided the basis for the sustainable development of the mine.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.31

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