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| 赣南加里东期阳埠(垇子下)岩体的锆石年龄、构造背景及含矿性评价 | |
| 引用本文： | 赵芝,陈振宇,陈郑辉,侯可军,赵正,许建祥,张家菁,曾载淋.赣南加里东期阳埠(垇子下)岩体的锆石年龄、构造背景及含矿性评价[J].岩矿测试,2012,31(3):530-535. |
| 作者姓名： | 赵芝 陈振宇 陈郑辉 侯可军 赵正 许建祥 张家菁 曾载淋 |
| 作者单位： | 1. 国土资源部成矿作用与资源评价重点实验室,中国地质科学院矿产资源研究所,北京100037 2. 江西省国土资源厅,江西南昌,330000 3. 江西省地质矿产勘查开发局赣南地质调查大队,江西赣州,341000 |
| 基金项目： | 中国地质大调查项目"南岭地区岩浆岩成矿专属性研究"(1212011120989);"我国重要矿产和区域成矿规律研究"项目(1212010633903); 国家深部探测技术与实验研究专项"南岭成矿带地壳岩浆系统结构探测实验"(SinoProbe 0301);"南岭于都—赣县矿集区立体探测技术与深部成矿预测示范"课题(201011048) |
| 摘 要： | 阳埠岩体是赣南著名的含稀土岩体之一,但研究程度低,缺乏精确的同位素年代学资料。文章对阳埠岩体风化壳的锆石样品进行了激光剥蚀-多接收器电感耦合等离子体质谱(LA-MC-ICPMS)U-Pb定年,获得206Pb/238U加权平均年龄为(461.1±1.3)Ma,说明该岩体形成于中奥陶世。区域上阳埠岩体与武功山山庄岩体(461 Ma)、赣南上犹岩体(464 Ma)、云开大山花岗岩(465～467 Ma)等为同时代岩体,属华南加里东晚期第一次岩浆活动峰期产物,暗示华南加里东期褶皱造山运动的开始。结合江西省加里东期花岗岩的地球化学资料,发现多数岩体的稀土总量较高,具备成矿母岩的首要条件。今后应对南岭地区加里东期花岗岩含矿性评价及找矿工作给予重视。 |
| 关 键 词： | 阳埠岩体 锆石U-Pb年龄 造山运动 稀土矿 赣南 |
| 收稿时间： | 2011/12/27 0:00:00 |
| 修稿时间： | 2012/3/21 0:00:00 |
Zircon U-Pb Dating, Tectonic Setting and Ore-bearing Properties Evaluation of the Caledonian Yangbu Pluton in South Jiangxi |
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| ZHAO Zhi,CHEN Zhen-yu,CHEN Zheng-hui,HOU Ke-jun,ZHAO Zheng,XU Jian-xiang,ZHANG Jia-jing and ZENG Zai-lin.Zircon U-Pb Dating, Tectonic Setting and Ore-bearing Properties Evaluation of the Caledonian Yangbu Pluton in South Jiangxi[J].Rock and Mineral Analysis,2012,31(3):530-535. | |
| Authors: | ZHAO Zhi CHEN Zhen-yu CHEN Zheng-hui HOU Ke-jun ZHAO Zheng XU Jian-xiang ZHANG Jia-jing and ZENG Zai-lin |
| Institution: | Key Laboratory of Metallogeny and Mineral Resource Assessment, Ministry of Land and Resources, Institute of Mineral Resources, Chinese Academy of Geological Science, Beijing 100037, China;Key Laboratory of Metallogeny and Mineral Resource Assessment, Ministry of Land and Resources, Institute of Mineral Resources, Chinese Academy of Geological Science, Beijing 100037, China;Key Laboratory of Metallogeny and Mineral Resource Assessment, Ministry of Land and Resources, Institute of Mineral Resources, Chinese Academy of Geological Science, Beijing 100037, China;Key Laboratory of Metallogeny and Mineral Resource Assessment, Ministry of Land and Resources, Institute of Mineral Resources, Chinese Academy of Geological Science, Beijing 100037, China;Key Laboratory of Metallogeny and Mineral Resource Assessment, Ministry of Land and Resources, Institute of Mineral Resources, Chinese Academy of Geological Science, Beijing 100037, China;Department of Land and Resources of Jiangxi Province, Nanchang 330000, China;Department of Land and Resources of Jiangxi Province, Nanchang 330000, China;Geological Survey Team of Gannan, Ganzhou 341000, China |
| Abstract: | The Yangbu pluton is one of the famous Rare earth element granitoid plutons in South Jiangxi,but it lacks precise isotopic chronological data.In this paper,we present research for the zircon U-Pb chronology of the Yangbu pluton by using Laser Ablation-Multicollector Inductively Coupled Plasma-Mass Spectrometry(LA-MC-ICPMS).The yield weighted average 206Pb/238U age is(461.1±1.3) Ma,which illustrates that the Yangbu pluton formed in the Middle Ordovician period.Granitic plutons,Yangbu,Shanzhuang(in the Wugong Mountains),Shangyou(in South Jiangxi) and Yunkai Mountain,have the same zircon U-Pb ages,which are products of the first peak period of magmatism during the Late Caledonian period in southern China,indicating a new cycle of folding and orogeny.Geochemical dates of Caledonian granitoids in Jiangxi Province show that most of them with higher ∑REEs content have a major necessary condition of mineralization mother rock of weathered-crust type REEs deposits.Therefore,they should be considered during ore-bearing properties evaluation and ore prospecting. |
| Keywords: | Yangbu pluton zircon U-Pb age orogeny rare rarth ore South Jiangxi |
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