| 徐新文,段建华,路耀祖,刘江峰,雷占昌,杨晓鸿.青海海德乌拉火山岩型铀矿床成因探讨[J].地质找矿论丛,2024,39(1):45-55 |
| 青海海德乌拉火山岩型铀矿床成因探讨 |
| Discussion on genesis of Haidewula volcanic rock type uranium deposit in Qinghai province |
| 投稿时间：2023-06-30 |
| DOI：10.6053/j.issn.1001-1412.2024.01.006 |
| 中文关键词: 铀矿床 火山岩 地质特征 矿床成因 海德乌拉地区 青海省 |
| 英文关键词:Uranium deposit volcanic rock geological characteristics deposit genesis Haidewula ares Qinghai province |
| 基金项目:青海省地质勘查专项资金项目"青海省都兰县海德乌拉地区铀矿预查"（编号：2020021041kc008）、青海省清洁能源矿产专项资金项目"青海省都兰县海德乌拉地区铀矿普查"（编号：2022013001qj001）、青海省科学技术厅重点研发与转化计划项目"青海省东昆仑火山岩型铀矿资源调查理论创新与找矿突破"（编号：2021-SF-157）联合资助。 |
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| 中文摘要: |
| 海德乌拉铀矿床是青海东昆仑地区近期新发现的火山岩型中型铀矿床。本文在论述其区域地质背景、矿区地质、铀矿床地质特征的基础上，讨论其成矿构造背景、成岩成矿时代及矿床成因。研究表明，海德乌拉铀矿床位于特提斯和华北地台两个构造域的交会部位，秦祁昆造山带南昆仑结合带东昆仑南坡俯冲碰撞杂岩带上，区内铀矿化与中基性、酸性火山岩关系密切；该铀矿床受区域一级昆中大断裂带控制，矿体主要赋存于与区域性NWW向断裂构造有关的次级NW向和NE向断裂构造中，且矿化体密集分布、厚度较大、品位较高；矿化蚀变主要为碎裂岩化和红化及黄铁矿化，矿石物质成分简单，铀矿物主要为沥青铀矿，未见其它共伴生元素；根据同位素定年及区域对比，海德乌拉火山岩型铀矿床成岩成矿时代为晚三叠世；铀矿化类型为火山岩型，铀矿床成因类型为热液型。 |
| 英文摘要: |
| Haidewula is a medium volcanic rock type uranium deposit newly discovered in the east Kunlun area in Qinghai province. This paper is based on regional geology and the background, local geological characteristics of the study area and geological characteristics of the uranium deposit to discuss metallogenic structural background, the rock-forming time and genesis of the uranium deposit. Geotectonically the deposit is located at subduction complex at South slope of east Kunlun mountain of the South Kunlun junction zone of Qin-Qi-Kunlun orogenic belt at intersection of Tethys and North China platform tectonic realms. Uranium mineralization is closely related to intermediate-basic and acidic volcanic rock. Haidewula uranium deposit is controlled by regional medium-large faults. Ore bodies occur mainly in NW, NE sub-faults related to regional NWW fault. Mineralization bodies are thick and densely distributed with higher uranium grade. Mineralization is mainly composed of cataclastic rock, alteration rock reddening and puritization. Mineralogy of the deposit is simple. Pitchblende is the main uranium mineral. In addition to uranium no other by-product elements occur. Isotropic dating and regional correlation show that volcanic rock of the deposit was formed in Late Triassic Epoch. Genetically the deposit is a hydrothermal uranium deposit. |
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