新疆东准噶尔地区铜矿勘查区找矿方向预测研究

发布时间：2018-01-11 17:41

本文关键词：新疆东准噶尔地区铜矿勘查区找矿方向预测研究　出处：《中国地质大学(北京)》2016年硕士论文　论文类型：学位论文

【摘要】：论文以新疆东准噶尔地区铜矿勘查区拉伊克勒克和乌伦布拉克两个铜矿床为研究对象,对矿化蚀变过程中微量元素和常量元素质量迁移进行计算。根据元素质量迁移计算结果,初步探讨元素质量迁移分布特征及与矿化体在空间上的内在联系。运用元素迁移量和迁移方向,揭示试验区铜矿床的形成机制,并为试验区进一步找矿工作提供一定的指示作用。本次研究主要取得如下几点认识和成果:1.通过对矿床中元素富集贫化特征及规律的研究,筛选出两个试验区的地球化学勘查指标。拉伊克勒克凝灰岩中铜矿床地球化学勘查指标有Cu、Ag、Mo、Se、S、Ba、Cs、Rb、K_2O;英云闪长岩中铜矿床地球化学勘查指标有Cu、Ag、Mo、Se、S、Ba、MgO、Na_2O、Ca O。乌伦布拉克铜矿床地球化学勘查指标有Cu、Ag、Mo、W、Se、S、Ba、Sr、Fe_2O_3。2.通过对拉伊克勒克铜矿床岩石元素质量迁移定量计算,得出以下认识:(1)富集元素Cu、Ag、Mo、S、Se等带入形成的正异常与铜矿体吻合度很高,凝灰岩中Ba、Cs、Rb、K_2O等与英云闪长岩中Ba、MgO、Na_2O、CaO等带出形成的负异常涵盖了整个剖面。(2)英云闪长岩中MgO、Na_2O、CaO带出产生的负异常,是岩浆期后热液蚀变过程中元素迁移形成的3.通过对乌伦布拉克铜矿床岩石元素质量迁移定量计算,探讨元素质量迁移特征与矿化体在空间上的内在联系,结果表明:赋矿闪长岩体中元素带入带出特征明显,成矿阶段发生明显带入的元素包括S、Cu、Ag、As、Sb、Mo、W和Se,以及H_2O~+等,发生明显带出的元素包括Ba、Sr、Rb、Fe_2O_3等,带出元素形成的负异常范围更大,涵盖了带入元素形成的正异常。4.根据各属性异常的空间分布规律,总结出了由Ba、Sr、K_2O、CaO等为代表的负异常体系、S为代表矿化剂元素异常体系、Fe与成矿元素Cu的协同平衡体系、成矿元素Cu及其伴生元素Ag、Mo、Se、W异常体系构成的多维异常体系。以多维异常体系理论为指导,对拉伊克勒克和乌伦布拉克两个试验区进行找矿方向预测。拉伊克勒克试验区凝灰岩和英云闪长岩与二长花岗岩接触带是今后找矿重点;乌伦布拉克试验区闪长岩和闪长岩与安山岩接触带是今后找矿重点。
[Abstract]:The paper takes the Ray Klerk and Urenblak copper deposits in the copper exploration area of the East Junggar area of Xinjiang as the research objects. The mass migration of trace elements and constant elements in the process of mineralization and alteration is calculated and calculated according to the results of mass migration of elements. The distribution characteristics of mass migration of elements and their spatial relationship with mineralized bodies are discussed preliminarily. The formation mechanism of copper deposits in the experimental area is revealed by means of the amount and direction of element migration. And provide some indication for further prospecting work in the test area. This study mainly obtained the following understanding and achievements: 1. Through the study of the characteristics and laws of the enrichment and dilution of elements in the deposit. The geochemical exploration indexes of the copper deposits in Ray Klerk tuff are selected. The geochemical exploration index of copper deposit in Yingyun diorite is Cu, Cu, Ag, Mo, S, Ba, mg, O, Na _ 2O, Ca, O, Na _ 2O, O, and Cu, in Wulunburak copper deposit. Based on the quantitative calculation of the mass migration of rock elements in the Ray Klerk copper deposit, the following understanding is obtained: 1) the enrichment element Cu is obtained by the quantitative calculation of the mass migration of the elements in the rocks of the Ray Klerk copper deposit. The positive anomalies brought in by Ag-Mo-Mo-Sn-Se and so on are in good agreement with the copper bodies, such as Ba-Csln RbSe K _ 2O in tuff and Ba-MgO _ 2O in Yingyun diorite. The negative anomalies formed by the CaO and other belts cover the negative anomalies produced by the MgO- Na _ S _ 2O-CaO belt in the diorite of the whole section. Through the quantitative calculation of the mass migration of the elements in the rocks of the Wulunburak copper deposit, the relationship between the characteristics of mass migration of elements and the mineralization in space is discussed. The results show that the elements in the ore-bearing diorite are obviously brought out, and the elements brought into the ore-forming stage include ScuCuCuAg-As-SbMo-Mow, See, and H _ 2O _ 2O ~, and so on. The elements with obvious outliers include BahsrsrbsrbsFe2O3 and so on, and the range of negative anomalies formed by these elements is larger. According to the spatial distribution law of each attribute anomaly, the negative anomaly system represented by Baer SrK _ 2O _ 2O _ Cao and so on is summarized. S is the synergistic equilibrium system between Fe and Cu, and the metallogenic element Cu and its associated element, Ag-Mo-Se, represent the anomalous system of mineralizer elements. The multi-dimensional anomaly system formed by W anomaly system is guided by the theory of multi-dimensional anomaly system. The prospecting direction of Ray Klerk and Urenblak is forecasted. The contact zone of tuff and quartz diorite with monzonitic granite in Ray Ray experimental area is the focus of ore prospecting in the future. Diorite and contact zone between diorite and andesite in Wulunblake experimental area are the key points of ore prospecting in the future.
【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】：2016
【分类号】：P618.41

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