世界核地质科学2025，Vol.42Issue(1)：76-85,10.DOI:10.3969/j.issn.1672-0636.2025.01.006
诸广山地区中生代产铀与非产铀花岗岩判别标志分析
Study on the identification marks of Mesozoic uranium deposit host and non deposit granites in Zhuguangshan area
摘要
Abstract
In order to explore the uranium mineralization specific characteristics of granite,the geochemical characteristics of Mesozoic-producing and non-producing uranium granites in the Nanling region were analyzed on the base of systematic collection of previous research.The results show that both uranium deposit host and non deposit granites are mainly formed by partial melting of Precambrian metamorphic sedimentary rocks,but the uranium deposit host granites are mainly formed by partially melting U-rich mudstones,while the non-deposit granites are the partially melted products of uranium-depleted sandstone.Compared with uranium deposit host granites,the biotite crystallization temperature in uranium deposit host granites is relatively low,F-rich and Cl-poor,and the magmatic melt has lower oxygen fugacity values,suggesting that uranium deposit host granites formed at relatively low temperatures and low oxygen fugacity.The low temperature,low oxygen fugacity,and F-rich physical and chemical environment are favorable for U to continuously enter the melt during the magma crystallization and differentiation and combine with oxygen to form uranite that are liable to undergo secondary alteration.The formation of uranite provides a good material basis for uranium mineralization.关键词
产铀与非产铀花岗岩/判别标志/诸广山地区/中生代Key words
uranium deposit host granite/identification marks/Zhuguangshan area/Mesozoic分类
地质学引用本文复制引用
叶松鑫,刘斌,阮昆..诸广山地区中生代产铀与非产铀花岗岩判别标志分析[J].世界核地质科学,2025,42(1):76-85,10.基金项目
广东省科技专项基金项目(编号:201112166271152)和中国核工业地质局铀矿调查与科研项目(编号:202439-4,202348-9)共同资助 Supported by Guangdong province Science and Technology Special Fund Project(No.201112166271152) （编号:201112166271152）
Exploration Project for Uranium Deposits(No.202439-4,202348-9)from the China Nuclear Geological Bureau （No.202439-4,202348-9）
