REE Characteristics of a New Uranium Mineral from the Xianshi Uranium Deposit, South China
REE Characteristics of a New Uranium Mineral from the Xianshi Uranium Deposit, South China
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DOI：
10.1111/1755-6724.13658
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发表时间：
2018-08
期刊：
影响因子：
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通讯作者：
Jincheng Luo;R. Hu;X. Bi;Youwei Chen
中科院分区：
文献类型：
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作者：
Jincheng Luo;R. Hu;X. Bi;Youwei Chen
Galuskin等人（2011）首次发现了氟铀矿（CaU）O 4是一种罕见的富钙矿物，具有萤石型结构，与晶质铀矿（UO 2）同构。前人对仙石花岗岩型铀存款的研究表明，晶质铀矿和黄铁矿是主要的矿石矿物，方铅矿、铅硒石和黄铁矿是次要的矿物相。对仙石存款铀矿物进行的更详细的岩石学和年代学研究表明，在三个成矿期形成了三种不同类型的含晶质铀矿组合（图1a; Luo等人，2015年）的报告。Luo等人（2015年）初步确定主要矿石矿物为晶质铀矿。然而，他们确实注意到，由于高钙值，化学性质与纯晶质铀矿不一致，并建议高钙晶质铀矿可能是vorlanite。因此，本研究的目的是利用LA-ICP-MS分析技术对中国南方仙石铀存款矿床的主要铀矿石矿物进行表征。
Galuskin et al. (2011) firstly discovered that vorlanite (CaU)O4 is a rare Ca-rich mineral with a fluorite-type structure, which is isostructural with uraninite (UO2). Previous studies of the Xianshi granite-related uranium deposit reported that uraninite and pyrite are the major ore minerals whereas galena, clausthalite (PbSe), and pyrite are minor phases in the ores. A more detailed petrographic and geochronological study of the uranium minerals from the Xianshi deposit showed that there are three distinct types of uraninite-bearing assemblages which formed at three mineralization episodes (Fig. 1a; Luo et al., 2015). Luo et al (2015) initially identified the main ore mineral as uraninite. However, they did note that chemistry was inconsistent with pure uraninite because of the high Ca values and suggested the high-Ca uraninite could be vorlanite. Therefore, the objective of this study is to characterize the main uranium ore mineral from the Xianshi uranium deposit, South China using LA-ICP-MS analytical technique.