安徽东源钨钼矿床地质地球化学找矿模型

发布时间：2018-02-12 10:25

本文关键词： 东源钨钼矿床地质特征地球化学异常地质-地球化学找矿模型　出处：《中国地质大学(北京)》2015年硕士论文　论文类型：学位论文

【摘要】：东源钨钼矿床位于安徽省南部祁门县,由安徽省332地质队于2009年探明储量。本文旨在总结安徽东源钨钼矿床的地质特征,结合元素的地球化学异常特征建立地质-地球化学找矿模型,为钨矿成矿地质背景和成矿规律的深入研究提供了新的思路与方向,进而提高找矿效率。通过对研究区域地质及岩石、蚀变岩、水系沉积物地球化学数据的分析,总结东源钨钼矿床地质和元素地球化学特征,本文建立了东源钨钼矿床的地质-地球化学找矿模型。主要取得了以下认识:东源钨钼矿床为一大型矿床,位于祁门县境内,矿体呈出露状态。赋矿地层为元古界牛屋组砂岩和千枚岩。成矿与东源花岗闪长岩体关系密切,东源花岗闪长岩体成岩年龄约146Ma。钨矿体受断裂控制明显,具有细脉浸染状和浸染状钨矿石两种矿石类型,成矿年龄约146Ma。矿体形态呈层状、似层状,局部呈透镜状。围岩蚀变主要为角岩化、钾化、绢云母化、绿泥石化为主。东源钨钼矿床区域化探找矿指示元素组合为W、Mo、Mn、Bi、Ag、As、Co、Cr、Ni、Ti、Zr共11项元素,每项元素异常内、中、外带分带清晰,异常范围与矿区位置套和度较高。其中W、Bi具有3级异常而成为该区的主成矿元素,As、Ag具有2级异常,其他元素具有1级异常而成为东源钨钼矿床的重要伴生有益组分。岩石化探找矿指示元素组合为W、Sn、Mo、Bi、Cu、Zn、As、Co、Li、Sb、V、Sc共计12种元素,其富集系数均在1.4以上。
[Abstract]:Dongyuan tungsten-molybdenum deposit is located in Qimen County, southern Anhui Province. The reserves were proved by 332 Geological team of Anhui Province in 2009. The purpose of this paper is to summarize the geological characteristics of Dongyuan Tungsten Molybdenum Deposit in Anhui Province. Combined with the geochemical anomaly characteristics of elements, a geological geochemical prospecting model is established, which provides a new idea and direction for the further study of the metallogenic geological background and metallogenic regularity of tungsten deposits. The geological and elemental geochemical characteristics of Dongyuan Tungsten and Molybdenum deposit are summarized by analyzing the geochemical data of the studied regional geology, rocks, altered rocks and water system sediments. The geological geochemical prospecting model of Dongyuan tungsten and molybdenum deposit is established in this paper. The main results are as follows: Dongyuan tungsten and molybdenum deposit is a large deposit located in Qimen County. The orebody is exposed. The ore-bearing strata are sandstone and phyllite of Niuwu formation in the Proterozoic. The ore-forming is closely related to the Dongyuan granodiorite, and the diagenetic age of Dongyuan granodiorite is about 146Ma.The tungsten ore body is obviously controlled by faults. There are two types of ore, the ore-forming age of which is about 146 Ma.The ore body is layered, bedded and partially lenticular. The main alteration of surrounding rock is hornstone, potassium, sericite, etc. The regional geochemical prospecting indicator element assemblage of Dongyuan Tungsten Molybdenum Deposit is composed of 11 elements, including 11 elements, and each element anomaly has a clear zonation in the middle and outer zones, and the main elements are as follows: (1) the regional geochemical prospecting indicator elements of the Dongyuan Tungsten Molybdenum Deposit are composed of 11 elements, and each element anomaly has a clear zonation in the middle and outer zones. The range of anomaly is higher than that of the location of mining area, in which WNBI has 3 order anomaly and becomes the main ore-forming element in this area. The other elements have a grade 1 anomaly and become an important associated beneficial component of the Dongyuan Tungsten Molybdenum Deposit. The indicator elements for petrogeochemical prospecting are composed of 12 elements, including 12 elements, the enrichment coefficient of which is above 1.4.
【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】：P618.6

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