南岭东段淋洋岩体的锆石铀-铅定年及其构造和成矿意义

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

1.
中国地质大学(北京), 北京 100083

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.
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

4.
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

5.
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

6.
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

7.
中国地质科学院, 北京 100037

基金项目:
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)

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)

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)

收稿日期: 2011-12-31

刊出日期: 2012-08-28

U-Pb Dating of Zircons from the Linyang Granitic Intrusion in the Nanling Metallogenic Belt and Its Significance to Tectonics and Metallization

1.
China University of Geosciences (Beijing), Beijing 100083, China

2.
Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China

3.
Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China

4.
Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China

5.
Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China

6.
Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China

7.
Chinese Academy of Geological Sciences, Beijing 100037, China

Received Date: 31 December 2011

Publish Date: 28 August 2012

摘要

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。
- 淋洋岩体 /
- 下村矿点 /
- 锆石LA-MC-ICPMS /
- U-Pb定年 /
- 成岩时代 /
- 印支期
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.
- Linyang /
- granitic /
- intrusion /
- Xiacun /
- ore /
- spot

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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

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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