期刊论文

中文

岩石学报

1000-0569

2022

38

9

2865-2888

10.18654/1000-0569/2022.09.20

2017YFC0602600:国家重点研发计划 41772082:国家自然科学基金 D2002;D2210:中国铀业有限公司地勘项目

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云际矿床是江西相山火山岩型铀矿田内最典型的碱交代型铀矿床,其矿体主要赋存于碎斑熔岩中。本文以两个典型矿化剖面为研究对象,系统研究了碱交代型铀矿化的蚀变分带特征、蚀变和矿石矿物组合以及热液蚀变过程中元素迁移变化规律。详细的岩相学观察表明,碱交代型铀矿化发育明显的侧向水平分带,由内到外可细分为矿化中心带、近矿强蚀变带、远矿蚀变带和新鲜围岩,各蚀变带之间并无明显的界线;发育的主要蚀变类型为钠长石化、赤铁矿化、碳酸盐化、绿泥石化和磷灰石化;铀赋存状态主要以独立铀矿物(钛铀矿和铀石为主) 、类质同象和吸附状态3种形式存在。Isocon标准化图解法表明,从远矿弱蚀变带到矿化...

Yunji deposit is the most typical alkali-metasomatized uranium deposit in Xiangshan volcanic-related uranium ore field in Jiangxi Provinee, and its ore bodies are mainly hosted within porphyroelastie lava. Exemplified by two typical uranium mineralization sections, we systematically studied the alteration zoning and mineral assemblage of alkali metasomatie uranium mineralization, as well as the elements migration regularity during hydrothermal process. Detailed petrographie observations indicated that the uranium mineralization is characterized...