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1、成都理工大学 硕士学位论文 内蒙古中部渣尔泰山群元素地球化学特征及铀成矿指示 姓名：赵帅 申请学位级别：硕士 专业：地球化学 指导教师：张成江 20100601 摘 要 i 内内蒙古中部渣尔泰山群元素地球化学特征蒙古中部渣尔泰山群元素地球化学特征 及及铀成矿铀成矿指示指示 作者简介： 赵帅，男，1984 年 3 月生，师从成都理工大学张成江教授， 2010 年 6 月毕业于成都理工大学地球化学专业，获得理学硕士学位。 摘摘 要要 位于华北地台北缘的渣尔泰山群，是中元古代裂谷沉积的一套碎屑岩碳 酸盐碎屑岩建造，自下而上分为书记沟组、增隆昌组、阿古鲁沟组和刘鸿湾 组。渣尔泰山群是我国的重要含矿层位
2、之一，蕴涵了许多大型超大型铜、铅、 锌等多金属硫化物矿床，而且也是一个重要的含铀层位。 本文主要以内蒙古中部的渣尔泰山群作为研究对象，对该群的四个岩性组 从微量元素、稀土元素地球化学角度进行对比研究，运用地球化学的理论和方 法及软件作图，分析对比各岩性组的地球化学特征的异同点，从元素的富集迁 移角度来探讨物源特征和古环境特点等；结合 601 铀矿点的特征，与阿古鲁沟 组非矿点进行对比，综合研究热液来源及对铀有指示作用的元素。得出以下几 点结论： 1）从整个渣尔泰山群来看，各微量元素的含量与岩性有关，富集的微量元 素有 W、Re、Pb、Sb、Ba、Hf、Ta，表现为亏损的元素有 Ni、Cu、Sr
3、、Nb、 In。增隆昌组灰岩中的微量元素亏损较严重，书记沟组和刘鸿湾组的碎屑岩次 之，阿古鲁沟组的碳质板岩富集的微量元素最多。 2）阿古鲁沟组是前寒武纪的一个重要成矿层位，产有 Cu、Pb、Zn、Au、 U 矿等，所以对该组的研究是工作的重中之重。其古环境的探讨可以由以下指 标得出：通过 U=2U/(U+Th/3)大于 1 和 w (V)/ w (V+Ni)值得出该组处于还原环 境。将阿古鲁沟组样品的投入 w(Zn)-w(Co)-w(Ni)三元图中，大部分靠近海底热 水沉积区，表明本区阿古鲁沟组大部分都受到了热水沉积的影响。 3） 渣尔泰山群 REE 的变化范围总体较大， 稀土含量配分模式表现
4、为 LREE 富集，HREE 亏损，稀土元素含量随岩性而异。通过 w(La) /w(Yb) -w(REE)的 投点，表明阿古鲁沟组沉积时期物源与其他组有较大差异。 4）601 铀矿点位于渣尔泰山群的阿古鲁沟组中，铀矿化与铁帽关系密切； 元素 Th、 U 在 601 矿点发生了分离。 稀土元素在碳质板岩和脉体的变化比较大， 表明在成矿期有组分的重新分配。 5）通过相关性分析，表明 601 矿点与非矿点中的元素 U 与 W、Re、Mo、 Ta 相关性较好，表明成矿流体可能来源于深部；元素 Fe、Pb、Cd、Re、Ni 对 成都理工大学硕士学位论文 ii 铀成矿具有一定指示作用。 关键词：渣尔泰山群
5、 阿古鲁沟组 601 矿点 微量元素 稀土元素 Abstract I The Geochemistry Of Zha Ertaishan Group in the Middle Part of Inner Mongolia and the Elements Direction of Uranium Mineralization Introduction to the author:Zhaoshuai,male,was born in March,1984,whose tutor was Professor Zhang Chengjiang.The author graduated from C
6、hengdu University of Technology,and got his Master Degree in Geochemistry major in June, 2010. Abstract Zha Ertaishan group, a sedimentation rift valley of proterozoic era,lying in the North China Platform, is made up of a clastic rock-carbonate-clastic rock construction.From bottom to top it consis
7、ts of Shu jigou group,Zheng longchang group,A gulugou group,Liu hongwan group. Zha Ertai group is one of a most important concentrating mineral stratum in our country.There are many large and over-large sale Copper,Leading,Zinc polymetallic sulfide deposits,it is also an important uranium layer. Thi
8、s article mainly regards Zha Ertaishan group in Inner Mongolia as a central object of study,it is compared four groups with the trace elements and rare earth elements,using geochemical theory,methods and software for mapping to compare the geochemical characteristics of each group with similarities
9、and differences,and the article tries to explore the source characteristics and environmental characteristics of ancient from the enrichment and migration of elements; Combining the characteristics of 601 Uranium ore-spot, focal point of the work is the contrast of non-ore spot, synthesize the resea
10、rch for the source of ore-forming fluids and the role of the element uranium instructions. Draw the following conclusions: 1) In tatol view of the Zha Eertai shan group,the content of each trace elements is related with lithology.The enriched trace elements include W、Re、Pb、Sb、Ba、 Hf、 Ta, the deficie
11、nt of the trace elements include Ni、 Cu、 Sr、 Nb、 In. specially,Zheng longchang group is most deficient of the trace elements, clastic rock of Shu jigou group and Liu hongwan group takes second place,the most enriched trace elements is A gulugou groups carbonaceous slate. 2) A gulugou group is a very
12、 important ore formation stratum of Precambrian, it births Cu、Pb、Zn、Au、U and so on.Therefore, the research group is the most 成都理工大学硕士学位论文 II important task. The ancient environment of indicators can be derived by the following:Due toU=2U/(U+Th/3) greater than 1 and w (V)/ w (V+Ni) obtained in a redu
13、cing environment of this group.Input the samples of A gulugou group to the w(Zn)-w(Co)-w(Ni) ternary diagram,most are near the seabed hydrothermal area,it indicates that most area of A gulugou group is influenced by deposition of water. 3) There is a large range of REE of Zha etaishan group, distrib
14、ution patterns of rare earth is the enrichment of LREE,and the deficient of HREE, the rare earth elements content varies with the lithology.With the input the samples of w(La) /w(Yb) -w(REE),it indicates that the source of A gulugou group is different from other groups. 4)601 uranium deposit lies in
15、 the A gulugou group of Zha ertaishan group, the uranium mineralization is closely related with the iron cap,with the separation of Th、 U.The rare earth elements are with big change between carbonaceous slate and veins, it indicates that there is a composition redistribution during the mineralizatio
16、n period. 5)Through the correlation analysis,the element U is closely linked with W、Re、 Mo、 Ta both 601 uranium deposit and non-ore spot,it is possible that the ore-forming fluids originated from mantle; in conclusion,Fe、 Pb、 Cd、 Re、 Ni give certain direction on the role of U mineralization. Keywords: Zha ertaishan Group A gulugou Group 601 uranium ore-spot trace elements rare earth elements 独创性声明 本人声明所呈交的学位论文是本人在导师指导下进行的研究工作及取得的 研究成果。据我所知，除了文中特别加以标注和致谢的地方外，论文中不包含其 他人已经发表或撰写
