New In-Situ LA-ICP-MS U-Pb Ages of Uraninite from the Mianhuakeng Uranium Deposit, Northern Guangdong Province, China: Constraint on the Metallogenic Mechanism
New In-Situ LA-ICP-MS U-Pb Ages of Uraninite from the Mianhuakeng Uranium Deposit, Northern Guangdong Province, China: Constraint on the Metallogenic Mechanism
复制标题
粤北棉花坑铀矿床铀矿LA-ICP-MS原位新U-Pb年龄：对成矿机制的制约
DOI：
10.1111/1755-6724.13558
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Li Haidong
中科院分区：
文献类型：
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作者：
Zhong Fujun;Pan Jiayong;Qi Jiaming;Yan Jie;Liu Wenquan;Li Haidong
中国南方热液铀矿床在过去的几十年中已成为主要的产铀地之一。南岭地区的桂东岩体和诸广山岩体中密集分布着众多的铀矿床，构成了中国最大的铀矿化区（蔡玉琦等，2015年）的报告。棉花坑铀存款矿床位于广东北方诸广山岩体的中南部，是华南最大的花岗岩型铀矿床之一。1000米）。对MHK存款的成因进行了大量的研究。然而，精确的铀成矿年龄仍然很难确定。本文首次对MHK存款矿床进行了晶质铀矿体原位LA-ICP-MS U-Pb年代学研究，以获得精确的成矿年龄，并进一步评价铀成矿机制。
ObjectiveHydrothermal uranium deposits in South China have become one of the main uranium producers over the past several decades. Numerous uranium deposits are densely distributed in the Guidong and Zhuguangshan plutons of the Nanling region, which constitute the largest uranium mineralization area in China (Cai Yuqi et al., 2015). The Mianhuakeng (MHK) uranium deposit, one of the largest granite-type uranium deposits in South China, is located in the central-southern part of the Zhuguangshan pluton, northern Guangdong Province, and is characterized by high grade ores (U: 0.01%–1.2%), large reserves (> 10000 t) and a large vertical extent of mineralization (ca. 1000 m). Abundant studies have carried out on the genesis of the MHK deposit. However, the accurate uranium mineralization age is still poorly constrained. A uraninite in-situ LA-ICP-MS U-Pb geochronological study was carried out for the first time in this paper, in order to obtain a precise and accurate mineralization age for the MHK deposit, and to further evaluate the mechanism of uranium mineralization.