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| 南岭东段淋洋岩体的锆石铀-铅定年及其构造和成矿意义 | |
| 引用本文： | 孙艳,李建康,陈振宇,陈郑辉,侯可军,赵正.南岭东段淋洋岩体的锆石铀-铅定年及其构造和成矿意义[J].岩矿测试,2012,31(4):730-735. |
| 作者姓名： | 孙艳 李建康 陈振宇 陈郑辉 侯可军 赵正 |
| 作者单位： | 1. 中国地质大学(北京),北京100083;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. 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 3. 中国地质科学院,北京,100037 |
| 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"(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"课题(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); 我国三稀金属资源战略调查"我国三稀资源战略调查及综合"项目(1212011220803) |
| 摘 要： | 南岭东段淋洋岩体研究程度低,成岩时代众说纷纭,其主要由中细-中粗粒斑状黑云(二云)花岗岩组成。本研究运用激光剥蚀-多接收器电感耦合等离子体质谱(LA-MC-ICPMS)对岩体进行锆石U-Pb精确测年。定年结果表明,淋洋岩体某一断层附近花岗岩的成岩年龄为(233.1±1.3)Ma(MSWD=1.11),下村矿点附近岩体的成岩年龄为(243.3±2.1)Ma(MSWD=2.3),二者均属于印支期,说明淋洋岩体形成于印支期陆陆碰撞和地壳抬升和增厚的构造环境,暗示淋洋岩体可能存在印支期或燕山期的成矿作用,具有进一步研究的价值。 |
| 关 键 词： | 淋洋岩体 下村矿点 锆石LA-MC-ICPMSU-Pb定年 成岩时代 印支期 |
| 收稿时间： | 2011/12/31 0:00:00 |
U-Pb Dating of Zircons from the Linyang Granitic Intrusion in the Nanling Metallogenic Belt and Its Significance to Tectonics and Metallization |
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| SUN Yan,LI Jian-kang,CHEN Zhen-yu,CHEN Zheng-hui,HOU Ke-jun and ZHAO Zheng.U-Pb Dating of Zircons from the Linyang Granitic Intrusion in the Nanling Metallogenic Belt and Its Significance to Tectonics and Metallization[J].Rock and Mineral Analysis,2012,31(4):730-735. | |
| Authors: | SUN Yan LI Jian-kang CHEN Zhen-yu CHEN Zheng-hui HOU Ke-jun and ZHAO Zheng |
| Institution: | China University of Geosciences (Beijing), Beijing 100083, China;Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Chinese Academy of Geological Sciences, Beijing 100037, China |
| Abstract: | The Linyang granitic intrusion is located in the east segment of the Nanling metallogenic belt. Due to a lack of research, it is not well known for its emplacement age. In this paper, the zircon U-Pb dating results from the Linyang granite through Laser Ablation-Multicollector Inductively Coupled Plasma-Mass Spectrometry (LA-MC-ICPMS) show that the granite near a fault and Xiacun ore spot intrude at (233.1±1.3) Ma and (243.3±2.1) Ma, respectively. Therefore, the Linyang granite formed in the Indo-Chinese epoch during the continent-continent collision together with uplifting and thickening of the earth's crust, and further research is necessary for the potential metallization of the Linyang intrusion that possibly occurred in the Indo-Chinese epoch or Yanshan epoch. |
| Keywords: | Linyang granitic intrusion Xiacun ore spot zircon LA-MC-ICPMS U-Pb dating petrogenic age Indo-Chinese epoch |
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