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吉林东部海西期花岗岩锆石U-Pb年龄、Hf同位素特征与地壳增生
Zircon U-Pb age,Hf isotope character of the Hercynian granite in the eastern Jilin Province and the crustal growth

查看参考文献43篇

刘燊 1   冯彩霞 1   胡瑞忠 2   冯光英 2   于晓飞 3   李才 3   贾大成 4   齐有强 2  
文摘 东北地区古生代花岗岩分布范围非常广泛,花岗岩研究对反演地壳增生意义重大。虽然如此,东部地区古生代花岗岩的研究仍相对薄弱,需要特别关注。LA-ICPMS U-Pb同位素定年结果表明,本研究花岗岩体为晚中生代海西期(262Ma)岩浆活动的产物。锆石的LA-MC-ICPMS Hf同位素研究结果显示,ε_(Hf)(t)范围为1.35~5.62,二阶段Hf模式年龄(t_(DM2))范围为1.1~1.4Ga,暗示花岗岩源区物质主要来自亏损地幔,同时暗示了一次重要的地壳增生事件。
其他语种文摘 Paleozoic granites are widely spread in northeastern China, and they are very important for revealing crustal growth. Nevertheless, the study on the Paleozoic granites in east part is relatively weak; therefore, Paleozoic granite research in east part requires special attention. Zircon U-Pb dating by LA-ICPMS technique indicates that the studied granitic pluton was emplaced during Late Paleozoic (Hercynian) with a weighted age of 262.2±1.2Ma. Meanwhile, zircon Hf analyses conducted by LA-MC-ICPMS show that this pluton has variational ε_(Hf)(262Ma) values from 1.35 to 5.62, indicating that the primary magma of the granites mainly resulted from a depleted asthenospheric mantle. In addition, the Hf two-stage modal ages change from 1091Ma to 1357Ma, suggesting an important crustal growth event beneath the studied area.
来源 岩石学报 ,2012,28(11):3715-3720 【核心库】
关键词 花岗岩 ; 锆石U-Pb年龄 ; 锆石Hf同位素 ; 海西期 ; 吉林东部
地址

1. 西北大学西北大学地质学系, 大陆动力学国家重点实验室, 西安, 710069  

2. 中国科学院地球化学研究所, 矿床地球化学国家重点实验室, 贵阳, 550002  

3. 吉林大学地球科学学院, 长春, 130061  

4. 吉林大学地球探测科学与技术学院, 长春, 130061

语种 中文
ISSN 1000-0569
学科 地质学
基金 西北大学大陆动力学国家重点实验室基金
文献收藏号 CSCD:4729819

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引证文献 2 篇

1 杨群 延边天宝山矿集区新兴铅锌(银)矿床成矿岩体的年代学与地球化学特征 岩石矿物学杂志,2015,34(3):295-308
CSCD被引 3 次

2 柯亮亮 内蒙古阿尔哈达地区花岗岩锆石LA-ICP-MS U-Pb年龄、稀土元素、Hf同位素组成及其地质意义 岩石矿物学杂志,2016,35(4):597-616
CSCD被引 3 次

显示所有2篇文献

论文科学数据集

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3. 佛坪穹窿混合岩和花岗岩锆石年龄和地球化学组成数据

数据来源：
国家青藏高原科学数据中心
PlumX Metrics
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