| 熊世荣,安国堡.四川盆地北部砂岩型铀矿床矿物学特征与矿床成因[J].地质找矿论丛,2023,38(2):139-145 |
| 四川盆地北部砂岩型铀矿床矿物学特征与矿床成因 |
| Mineralogical characteristics and genesis of sandstone type uranium deposits in the northern Sichuan basin |
| 投稿时间：2022-08-23 |
| DOI：10.6053/j.issn.1001-1412.2023.02.002 |
| 中文关键词: 砂岩型铀矿 铀矿物 矿床成因 四川盆地北部 |
| 英文关键词:sandstone type U deposit U mineral genesis Northern Sichuan basin |
| 基金项目:四川省财政厅2017年省级事业单位政府购买服务试点项目"川东北铀矿、石墨矿远景调查"(编号:川财综〔2017〕12号)资助。 |
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| 中文摘要: |
| 本文基于对四川盆地北部砂岩型铀矿体地表露头和坑道伽玛强度测量、铀矿物特征分析,通过样品岩矿测试与鉴定、扫描电镜分析等手段,对铀矿床(点)铀矿石的铀品位、矿物组成、化学成分、结构构造和铀的存在形式进行了研究。结果显示,铀矿石为钙质胶结岩屑石英细-中粒砂岩,其中岩屑以变质岩为主,含有火山岩和花岗岩碎屑,反映铀成矿物质来源于米仓山基底花岗岩和下震旦统铁船山组火山岩;铀矿物主要是铀石,少量沥青铀矿;铀矿石具交代结构,反映了铀矿床的后生富集成因。 |
| 英文摘要: |
| Gamma survey in the northern Sichuan basin is carried out at outcrops of U-ore bodies at surface and in the edits. U-minerals are sampled to study their characteristics. Test and identification are conducted on rocks and ores of the U deposits including scanning electronic microscope analysis. Data of U gade and occurrence, mineralogy and chemical composition, texture and structure of ore of the U deposits are obtained showing that the U ore is fine-medium grained quartz sandstone cemented with calcareous materials. The debris is mainly from metamorphic rock including volcanic and granitic rock debris suggesting that the ore materials come from Micangshan basement granite and volcanic rock of Lower Sinian Tiehuashan formation. Uranite is the main mineral. There are also some pitchblende. In addition replacement texture of the ore is indication of epigenetic U enrichment. |
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