• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Asian earth sciences >Backarc mafic-ultramafic magmatism in Northeastern Vietnam and its regional tectonic significance
【24h】

Backarc mafic-ultramafic magmatism in Northeastern Vietnam and its regional tectonic significance

机译：越南东北部Backarc镁铁质超岩浆岩浆作用及其区域构造意义

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The geology of Northern Vietnam offers critical clues on the convergence history between the South China and Indochina blocks. We constrain the tectonic evolution of the South China and Indochina blocks using geochemical, mineral chemical and geochronological data collected from mafic-ultramafic rocks exposed in the Cao Bang area, Northeastern Vietnam. These rocks show significant enrichment in large ionic lithophile elements (LILEs) such as Cs, Rb, Ba, Th, U, and Pb and depletion in high field strength elements (HFSEs) such as Nb, Ta, Zr, and Ti showing [Nb/U]_N between 0.28-0.41, [La/Yb]_N - 3.94-10.00 and Zr/Y = 2.0-4.4. These geochemical features as well as the petrology and mineral chemistry of the Cao Bang mafic-ultramafic magmas are comparable to those of magmatic complexes formed in a back-arc environment. The basalts yield Rb-Sr whole rock ages of 263 ±15 Ma, that are consistent with the zircon U-Pb and K-Ar ages reported in previous studies from the same area. The spatial and temporal distribution of the arc magmas within the Indochina block and along the southern margin of the South China block suggest that the Permo-Triassic mafic-ultramafic magmas formed during a tectonic event that is different from the subduction and collision event between the Indochina and South China blocks.
机译：越南北部的地质情况为华南与印度支那地区之间的融合历史提供了重要线索。我们使用从越南东北曹邦地区暴露的镁铁质-超镁铁质岩石中收集的地球化学，矿物化学和地球年代学数据，来约束华南和印度支那地区的构造演化。这些岩石在诸如Cs，Rb，Ba，Th，U和Pb的大型离子型亲石元素（LILE）中显示出明显的富集，而在诸如Nb，Ta，Zr和Ti的高场强元素（HFSE）中则耗竭，显示出[Nb / U] _N在0.28-0.41之间，[La / Yb] _N-3.94-10.00和Zr / Y = 2.0-4.4。 Cao Bang镁铁质-超镁铁质岩浆的这些地球化学特征以及岩石学和矿物化学与在弧后环境中形成的岩浆复合体具有可比性。玄武岩产生的Rb-Sr整个岩石年龄为263±15 Ma，这与该地区先前研究中报道的锆石U-Pb和K-Ar年龄一致。印度支那地块内以及华南地块南缘沿弧弧岩浆的时空分布表明，构造事件期间形成的二叠系-三叠纪镁铁质-超镁铁质岩浆不同于印度支那之间的俯冲和碰撞事件。和华南街区。

著录项

  • 来源
    《Journal of Asian earth sciences》 |2014年第15期|45-60|共16页
  • 作者

    Ngo Xuan Thanh; Tran Thanh Hai; Nguyen Hoang; Vu Quang Lan; Sanghoon Kwon; Tetsumaru Itaya; M. Santosh;

  • 作者单位

    Hanoi University of Mining and Geology, Dong Ngac, Tu Liem, Hanoi, Viet Nam;

    Hanoi University of Mining and Geology, Dong Ngac, Tu Liem, Hanoi, Viet Nam;

    Institute of Geological Sciences, VAST, 84 Ngo Chua Lang, Dong Da, Hanoi, Viet Nam;

    Northern Geological Mapping Division, General Department of Geology and Minerals of Viet Nam, Hanoi, Viet Nam;

    Department of Earth System Sciences, Yonsei University, Seoul 120-749, Republic of Korea;

    Institute of Natural Sciences, Okayama University of Science, 1-1 Ridai cho, Kita-ku, Okayama 700-0005, Japan;

    School of Earth Sciences and Resources, China University of Geosciences Beijing, No. 29 Xueyuan Road, Haidian District, Beijing 100083, China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Indochina; Northeast Vietnam; Mafic-ultramafic magma; South China; Indosinian orogeny;

    机译：印度支那;越南东北;镁铁质-超岩浆;华南印支期造山运动;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号