衢州中生代火山岩地球化学特征与铀成矿关系  

Relationship between the geochemical characteristics of Mesozoic volcanic rocks and uranium mineralization in Quzhou

作　　者：字艳梅 Zi Yanmei(College of Earth Sciences,East China University of Technology,Nanchang,Jiangxi,330013,China)

机构地区：[1]东华理工大学地球科学学院,江西南昌330013

出　　处：《化工矿产地质》2024年第2期123-131,共9页Geology of Chemical Minerals

基　　金：2023年江西省研究生创新基金项目赣南河源花岗伟晶岩型锂矿元素富集与矿床成因研究(编号:DHYC-202307)。

摘　　要：浙江衢州北部670大桥坞矿区和南部660大洲矿区均属于火山岩型铀矿,是赣杭铀成矿带东段重要的产铀区,其成矿特征具有很强的代表性意义。本文拟对670矿区和660矿区主要赋矿围岩黄尖组、九里坪组的主量、微量及稀土元素地球化学数据进行综合性整理,在前人研究基础上进一步探讨矿区铀成矿作用与赋矿围岩(源岩性质、构造环境)之间的联系,同时揭示两矿区主要赋矿围岩黄尖组、九里坪组火山岩的共性与差异,为研究赋矿围岩在铀成矿中的作用提供地球化学证据。据主量、微量及稀土元素岩石地球化学特征推断出黄尖组、九里坪组是由相同的源岩物质经部分熔融作用形成;而分属不同大地构造单元的两组火山岩均形成特征较为相似铀矿区,本文认为成矿物质和成岩物质具有相同的来源。The Daoqiaowu(670)mining area in the north of Quzhou and The Dazhou(660)mining area in the south of Quzhou belong to the volcanic rock-type uranium deposits,which are important uranium mining areas in the eastern part of Ganzhou-Hangzhou uranium mineralization zone,and their metallogenic characteristics have strong representative significance.This paper intends to comprehensively sort out the geochemical data of major elements,trace elements and rare earth elements of Huangjian formation and Jiuliping formation of the main orebearing surrounding rocks in Daoqiaowu(670)mining area and Dazhou(660)mining area,and further probe the relationship between uranium mineralization and ore-bearing surrounding rocks(source rock nature and tectonic setting)in the mining area based on previous research.At the same time,the commonness and difference in the volcanic rocks of Huangjian formation and Jiuliping formation in the two mining areas are revealed,which provides geochemical evidence for studying the function of ore-forming surrounding rocks in the uranium mineralization.According to the geochemical characteristics of major elements,trace elements and rare earth elements,it is inferred that Huangjian formation and Jiuliping formation are formed with the same source rock melted partially.The two groups of volcanic rocks belonging to different tectonic units have similar characteristics to form uranium mining areas.This paper considers that the metallogenic material and the diagenetic material come from the same rock.

关 键 词：火山岩 地球化学 铀矿 衢州 

分 类 号：P588.1[天文地球—岩石学] P619.14[天文地球—地质学]