南澳弗洛姆铀成矿区大地构造演化及成矿模式  

Tectonic Evolution and Metallogenic Model of Frome Uranium Metallogenic Area in South Australia

作　　者：姚振凯 马亮 徐勇[1,3] 黄宏业 

机构地区：[1]核工业二三〇研究所,湖南 长沙 [2]广核铀业发展有限公司,北京 [3]湖南省伴生放射性矿产资源评价与综合利用工程技术研究中心,湖南 长沙

出　　处：《地球科学前沿（汉斯）》2023年第6期664-672,共9页Advances in Geosciences

摘　　要：本文依活化构造理论,用成矿分析方法对南澳弗洛姆铀成矿区的大地构造演化和大地构造铀成矿模式进行探索。得出成矿区大地构造经历了原始地槽、古地台和原始活化三个阶段。铀成矿演化与大地构造演化密切相关,主要是古元古代原始地槽、中元古代古地台和新元古代活化所成的内生铀成矿,及新生代活化的表生砂岩型铀成矿的三个阶段四期次成矿复合所成。大地构造铀成矿模式是三多三主复成因模式,即多个大地构造阶段成矿,以活化阶段中–晚阿尔卑斯期成矿为主;多种铀源参与成矿,以新生代富铀地下水成矿为主;多成因铀成矿,以表生水成成矿为主的复成因模式。这一认识对明确找矿方向,具有一定的实际意义。Based on the theory of activated tectonics, the tectonic evolution and the tectonic uranium me-tallogenic model of the Frome in South Australia was studied by metallogenic analysis. It is con-cluded that the tectonics of Frome experienced three stages: the original geosyncline, the ancient platform and the original tectonic activation. The evolution of uranium metallogenic is closely related to the evolution of tectonics, which is mainly composed of three stages and four times of the polygenetic compound uranium mineralization include the endogenetic uranium mine-ralization related to Paleoproterozoic original geosyncline, the Mesoproterozoic ancient platform and the tectonic activation of Neoproterozoic platform, and the supergene sandstone-type uranium mineralization related to activation of the Cenozoic epigenetic. The tectonic uranium metallogenic model is a Three-Many and Three-Main polygenetic compound model, which includes multiple tectonic stages of uranium metallogenesis, mainly in the activation stage of the middle-late Alpine metallogenic;mutiple uranium sources participated in the uranium metallogenenesis, mainly the Cenozoic uranium-rich groundwater metallogenenesis;polygenetic uranium metallogenic model, dominated by epigenetic hydrogenic uranium metallogenenesis. This understanding has certain practical significance for clear prospecting direction.

关 键 词：南澳大利亚 弗洛姆 铀成矿区 大地构造演化 大地构造铀成矿模式 

分 类 号：P61[天文地球—矿床学]