| 赣南—粤北油山—猫头寨岩体的成岩时代及其地质意义 |
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| 引用本文： | 张家菁,赵正,陈振宇,陈郑辉,侯可军.赣南—粤北油山—猫头寨岩体的成岩时代及其地质意义[J].岩矿测试,2012,31(3):554-558. |
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| 作者姓名： | 张家菁 赵正 陈振宇 陈郑辉 侯可军 |
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| 作者单位： | 1. 江西省地质调查研究院,江西南昌330030;中国地质大学(北京),北京100083;江西省国土资源厅,江西南昌330000
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 |
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| 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”（SinoProbe0301）; “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）; 国家自然科学青年基金资助项目（41103015）; 中国博士后科学基金项目（20100480359）;国土资源部成矿作用与资源评价重点实验室基金项目（ZS1107） |
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| 摘 要： | 油山岩体位于赣南—粤北地区,是大庾岭的重要组成部分,也是南岭地区代表性的花岗岩岩体。但是,对其地质特征、成岩时代、构造背景及其成矿专属性研究程度相对较低。文章在野外调研的基础上,对油山岩体中心部位的中细粒板状黑云母花岗岩样品进行了初步研究,利用激光剥蚀-多接收器电感耦合等离子体质谱法(LA-MC-ICPMS)测定其成岩时代,确定其形成年龄有两个峰值,即236.5 Ma和437.8 Ma。该结果表明油山岩体确实属于复式岩体,并且经历的地质历史主要是加里东期和印支期,而不是以往认为的燕山期。
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| 关 键 词： | 油山岩体 大庾岭 花岗岩 年代学 |
| 收稿时间： | 2011/12/24 0:00:00 |
| 修稿时间： | 2012/3/20 0:00:00 |
Geochronology of the Youshan-Maotouzai Pluton in South Jiangxi- North Guangdong and Its Geological Implication |
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| ZHANG Jia-jing,ZHAO Zheng,CHEN Zhen-yu,CHEN Zheng-hui and HOU Ke-jun.Geochronology of the Youshan-Maotouzai Pluton in South Jiangxi- North Guangdong and Its Geological Implication[J].Rock and Mineral Analysis,2012,31(3):554-558. |
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| Authors: | ZHANG Jia-jing ZHAO Zheng CHEN Zhen-yu CHEN Zheng-hui and HOU Ke-jun |
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| Institution: | Jiangxi Institute of Geological Survey, Nanchang 330030, China;China University of Geosciences (Beijing), Beijing 100083, China;Department of Land and Resources of Jiangxi Province, Nanchang 330000, China;Key Laboratory of Metallogeny and Mineral Resource Assessment, Ministry of Land and Resources, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Key Laboratory of Metallogeny and Mineral Resource Assessment, Ministry of Land and Resources, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Key Laboratory of Metallogeny and Mineral Resource Assessment, Ministry of Land and Resources, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Key Laboratory of Metallogeny and Mineral Resource Assessment, Ministry of Land and Resources, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China |
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| Abstract: | The Youshan-Maotouzai rock body, located in the South Jiangxi-North Guangdong area, is an important part of the Dayu Mountains and a representative granite pluton in the Nanling region. However, studies of its geological features, petrogenic chronology, tectonic and metallogenic specialization are relatively few. In this study, based on detailed field research, Laser Ablation-Multicollector Inductively Coupled Plasma-Mass Spectrometry (LA-MC-ICP-MS) was used to detect the formation age of the Youshan-Maotouzai complex. The test results show two peak ages for the magmatism of the Youshan pluton, 236.5 Ma and 437.8 Ma, which indicate that the Youshan rock body is a complex pluton and is mainly formed by the two magmatic events of the Caledonian period and the Indo-Sinian period, but not the Yanshanian period, as the previous study suggested. |
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| Keywords: | Youshan pluton Dayu mountain granite chronology |
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