| 湖南秀才洞铀矿岩浆岩地质与地球化学特征及成因浅析 |
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| 引用本文： | 黄敏,李冉,陈新跃,赖健清,余旭辉,明小泉.湖南秀才洞铀矿岩浆岩地质与地球化学特征及成因浅析[J].地质与勘探,2019,55(5):1173-1184. |
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| 作者姓名： | 黄敏 李冉 陈新跃 赖健清 余旭辉 明小泉 |
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| 作者单位： | 湖南科技大学,页岩气资源利用湖南省重点实验室,湖南湘潭 411201;湖南科技大学,资源环境与安全工程学院地质系,湖南湘潭 411201;核工业230研究所,湖南长沙,410011;中南大学,有色金属成矿预测教育部重点实验室,湖南长沙 410083;成都理工大学,地球科学学院,四川成都 610059;四川省地质矿产勘查开发局区域地质调查队,四川成都 610213;江西省地质矿产勘查开发局九一二大队,江西鹰潭,335001 |
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| 基金项目： | 国家自然科学基金项目（编号：41372209）、页岩气资源利用与开发湖南省重点实验室开放基金项目（编号：E21718）和中南大学有色金属成矿预测与地质环境监测教育部重点实验室开放基金项目（编号：2017YSJS05）联合资助。 |
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| 摘 要： | 湖南秀才洞铀矿位于诸广山北部的鹿井矿田，极具找矿潜力。为进一步查明秀才洞铀矿成矿条件，揭示岩浆岩与成矿作用关系及成矿成岩机制，本文开展了典型矿床地质特征研究，并对矿区典型岩浆岩进行了主量元素、微量元素地球化学分析。结果表明：矿区岩体属酸性岩，具富Si低Ca偏碱特征；微量元素地球化学显示花岗岩富集Nb、U、Th和Ta等高场强元素，贫Sr、Ba、V、Cr、Co、Ni等元素，具典型A型花岗岩特征。岩浆岩及矿石稀土配分曲线均为“平展型”，具强Eu负异常特征，岩浆岩及矿石具有一定的同源性，可以为同一成矿系统。矿体均产于围岩与花岗岩接触带附近，并受断裂构造控制，岩浆岩和地层均提供了一定的铀源。结合矿床特征、成矿地质特征及与岩体的空间关系认为秀才洞铀矿是花岗岩外接触带型铀矿。
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| 关 键 词： | 铀矿 地球化学 矿床特征 秀才洞 湖南省 |
| 收稿时间： | 2017/12/8 0:00:00 |
| 修稿时间： | 2019/1/20 0:00:00 |
Geology and geochemistry of magmatic rock and genesis of the Xiucaidong uranium deposit in Hunan Province |
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| Huang Min.Geology and geochemistry of magmatic rock and genesis of the Xiucaidong uranium deposit in Hunan Province[J].Geology and Prospecting,2019,55(5):1173-1184. |
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| Authors: | Huang Min |
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| Institution: | Hunan Provincial Key Laboratory of Shale Gas Resource Exploitation, Hunan University of Science and Technology, Xiangtan, Hunan; Department of Geology, School of Resource Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan, Hunan; No.230 Research Institute of Nuclear Industry, Changsha, Hunan; Key Laboratory of Metallogenic Prediction of Nonferrous Metals, Ministry of Education, Central South University, Changsha, Hunan; College of Earth Science, Chengdu University of Technology, Chengdu, Sichuan; Sichuan Geology and Mineral Bureau Regional Geological Survey Team, Chengdu, Sichuan; No. 912 Geological Team of Jiangxi Geology and Mineral Bureau, Yingtan, Jiangxi |
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| Abstract: | Located in the Lujing ore field, northern Zhuguangshan, Hunan Province, the Xiucaidong uranium deposit is considered to have a great potential for prospecting. The purpose of this work is to further clarify ore-forming conditions and elucidate the relationship between magma rock and mineralization as well as its genesis. To this end, we have studied its geological characteristics and made geochemical analysis to the major and trace elements in typical magmatic rocks in the deposit. Results show that these magmatic rocks belong to a high-Si, low-Ca, alkaline series. The granites are characterized by enrichment of high field-strength elements (Nb, U, Th, Ta) and depletion of Sr,Ba,V,Cr,Co,Ni, suggesting typical features of A type granite. All the REE distribution patterns of magmatic rocks and ores are slightly right-inclined with obvious negative Eu anomalies indicating that the magmatic rocks and ore should be in the same metallogenic system with a common source. Ore-bodies all occur nearby contact zones between wall rocks and granite, controlled by fault structures. Both the magma rocks and strata might provide a certain amount of uranium source. From characteristics of the deposit, its mineralization geology and spatial relationship between magmatic rocks and ore bodies, this work suggests that the Xiucaidong deposit can be classified as an exo-contact type uranium-ore resource related to granite. |
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| Keywords: | uranium deposit geochemistry deposit characteristics Xiucaidong Hunan Province |
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