中国地质2024，Vol.51Issue(3)：951-964,14.DOI:10.12029/gc20201021001
捷克波西米亚盆地斯特拉砂岩型铀矿床成矿特征及成矿模式
Metallogenic characteristics and model of sandstone-type uranium deposits in Straz area,Bohemia Basin,Czech Republic
摘要
Abstract
[Objective]Straz area(Bohemia Basin,Czech Republic)is a well-known uranium metallogenic area.The mineralization of sandstone-type uranium deposits is complex.Determining its metallogenic characteristics and metallogenic model is of great significance to perfect the metallogenic theory of sandstone-type uranium deposits and know the prospecting and exploration of the similar uranium deposits in China.[Methods]On the basis of summarizing the geological characteristics and metallogenic conditions of sandstone-type uranium deposits in the Straz area,this study focus on the uranium source,metallogenic stage and genesis of the deposits,and comparative studies are conducted by the similar sandstone-type uranium deposits in Songliao Basin.[Results]The Straz deposit can be divided into six metallogenic stages according to its mineral assemblage characteristics,i.e.,carbon-hydromica,hematite-kaolinite,uranium,polymetallic,limonite and hematite-quartz stage.Proterozoic and Paleozoic igneous,metasedimentary,and sedimentary rocks outcropping to the northeast of the Bohemia Basin are considered potential sources for uranium.The Lusatian Massif contains biotite granodiorite and porphyritic biotite granite with.The low Th/U ratios suggest that part of the uranium is probably present in leachable form and these rocks constitute viable uranium sources.[Conclusions]The metallogenic model of the Straz area belongs to the"three factors and three majors":Multi uranium source-basin basement primary uranium source,multi stage tectonic ore controlling-early Alps(about 70 Ma)orogenic movement,multi genetic composite mineralization-early Alps magmatic hydrothermal superimposed mineralization.关键词
砂岩型铀矿/成矿特征/成矿模式/斯特拉地区/波西米亚盆地/捷克共和国/矿产勘查工程Key words
sandstone-type uranium deposit/metallogenic characteristics/metallogenic model/Straz area/Bohemia Basin/Czech Republic/mineral exploration engineering分类
天文与地球科学引用本文复制引用
艾尔提肯·阿不都克玉木,宋昊,陈友良,赵子超,李巨初,张成江..捷克波西米亚盆地斯特拉砂岩型铀矿床成矿特征及成矿模式[J].中国地质,2024,51(3):951-964,14.基金项目
国家自然科学基金(42173072、U1967207)和中国核工业地质局项目"铀资源大数据分析与找矿战略研究"(201928-3)联合资助. Supported by the projects of National Natural Science Foundation of China(No.42173072,No.U1967207)and China Nuclear Geology"Big Data Analysis of Uranium Resources and Research on Prospecting Strategy"(No.201928-3). （42173072、U1967207）
