| 广东平远县278铀矿床流纹岩、次流纹斑岩和辉绿岩LA-ICP-MS锆石U-Pb定年及其地质意义 |
| |
| 引用本文： | 夏 菲. 广东平远县278铀矿床流纹岩、次流纹斑岩和辉绿岩LA-ICP-MS锆石U-Pb定年及其地质意义[J]. 地质与勘探, 2017, 53(1): 109-123 |
| |
| 作者姓名： | 夏 菲 |
| |
| 作者单位： | 1. 东华理工大学放射性地质与勘探技术国防重点学科实验室,江西南昌,330013;2. 国土资源部中央地质勘查基金管理中心,北京,100037;3. 广东省核工业地质局二九三大队,广东广州,510800;4. 广东省核工业地质局二九二大队,广东河源,517001 |
| |
| 基金项目： | 中国地质调查局项目（编码：12120114034401）资助 |
| |
| 摘 要： | 作者对广东平远县278铀矿床的流纹岩、次流纹斑岩和辉绿岩进行了高精度锆石LAICP-MS U-Pb同位素测年,获得流纹岩、次流纹斑岩和辉绿岩单颗粒锆石的加权平均年龄分别为:93.5±1.6Ma、95.1±1.1Ma、96.2±2.8Ma,属晚白垩世早期,且三者在误差范围内具有同期性,表明该区在晚白垩世早期既有幔源的基性岩浆活动,又有壳源的酸性岩浆活动,这为该区当时处于拉张的构造环境提供了佐证。
|
| 关 键 词： | 火山岩-次火山岩 锆石U-Pb年龄 LA-ICP-MS 278铀矿床 平远县 广东 |
| 收稿时间： | 2016-08-22 |
| 修稿时间： | 2016-10-20 |
LA-ICP-MS zircon U-Pb dating on rhyolites, supergene rhyolite porphyry and diabase of No.278 uranium deposit in Pingyuan county, Guangdong and its geological implications |
| |
| Xia Fei. LA-ICP-MS zircon U-Pb dating on rhyolites, supergene rhyolite porphyry and diabase of No.278 uranium deposit in Pingyuan county, Guangdong and its geological implications[J]. Geology and Prospecting, 2017, 53(1): 109-123 |
| |
| Authors: | Xia Fei |
| |
| Affiliation: | National Defense key discipline laboratory of Radioactive geology and Exploration Technology, East China Univeisity of Technology, Nanchang, Jiangxi; Central Geological Exploration Fund, Ministry of Land and Resources, West city, Beijing; 293 Brigade of the Nuclear Industry Geological Bureau of Guangdong Province, Guangzhou, Guangdong; 292 Brigade of the Nuclear Industry Geological Bureau of Guangdong Province, Heyuan, Guangdong |
| |
| Abstract: | This work focused on the No.278 uranium deposit in Pingyuan county, Guangdong Province. We have conducted a chronological study of zircons from the rhyolites, supergene rhyolite porphyry and diabase by means of LA-ICP-MS U-Pb. The weighted mean ages of the zircons are 93.5±1.6Ma, 95.1±1.1Ma and 96.2±2.8Ma in turn, suggesting they formed during the early Late Cretaceous. They have the same period in the error range. This suggests that the activity of this area was involved both in mafic magma from the mantle and acidic magma from the earth''s crust in early Late Cretaceous. It is a piece of evidence to show a tensional tectonic environment at that time. |
| |
| Keywords: | volcanic rock-sub-volcanic rock zircon U-Pb age LA-ICP-MS 278 Uranium deposit Pingyuan County Guangdong Province |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《地质与勘探》浏览原始摘要信息 |
|
点击此处可从《地质与勘探》下载全文 |
|
