...
  • 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 >Successive shifts of the India-Africa transform plate boundary during the Late Cretaceous-Paleogene interval: Implications for ophiolite emplacement along transforms
【24h】

Successive shifts of the India-Africa transform plate boundary during the Late Cretaceous-Paleogene interval: Implications for ophiolite emplacement along transforms

机译：晚白垩世-古生代间隔期间印度-非洲转换板块边界的连续偏移：蛇绿岩沿转换的位置的意义

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 Arabian Sea in the NW Indian Ocean is a place where two major transform boundaries are currently active: the Owen Fracture Zone between India and Arabia and the Owen Transform between India and Somalia. These transform systems result from the fragmentation of the India-Africa Transform boundary, which initiated about 90 Myrs ago, when the India-Seychelles block separated from Madagascar to move towards Eurasia. Therefore, the geological record of the Arabian Sea makes it possible to investigate the sensitivity of a transform system to several major geodynamic changes.Here we focus on the evolution of the India-Africa transform system during the similar to 47-90 Ma interval. We identify the Late Cretaceous (similar to 90-65 Ma) transform plate boundary along Chain Ridge, in the North Somali Basin. From 65 to similar to 42-47 Ma, the India-Africa transform is identified at the Chain Fracture Zone, which crossed both the Owen Basin and the North East Oman margin. Finally, the transform system jumped to its present-day location in the vicinity of the Owen Ridge. These shifts of the India-Africa boundary with time provide a consistent paleogeographic framework for the emplacement of the Masirah Ophiolitic Belt, which constitutes a case of ophiolite emplaced along a transform boundary. The successive locations of the India-Africa boundary further highlight the origin of the Owen Basin lithosphere incoming into the Makran subduction zone.
机译：西印度洋西北部的阿拉伯海是两个主要转换边界目前活跃的地方：印度和阿拉伯之间的欧文断裂带以及印度和索马里之间的欧文转换。这些转换系统来自印度－非洲转换边界的碎片化，该边界起始于约90迈尔斯，当时印度－塞舌尔群岛从马达加斯加分离而向欧亚大陆移动。因此，阿拉伯海的地质记录使研究转换系统对几个主要地球动力学变化的敏感性成为可能。在这里，我们着重探讨印度-非洲转换系统在类似于47-90 Ma间隔期间的演化。我们确定了北索马里盆地沿Chain Ridge的晚白垩世（类似于90-65 Ma）转换板块边界。从65到类似于42-47 Ma，在链断裂带上发现了印度-非洲转变，该断裂带穿过了欧文盆地和东北阿曼边缘。最终，转换系统跳到了Owen Ridge附近的当前位置。印度-非洲边界的这些随时间变化为Masirah蛇绿岩带的建立提供了一致的古地理框架，这构成了沿转换边界放置的蛇绿岩的情况。印非边界的连续位置进一步突显了进入马克兰俯冲带的欧文盆地岩石圈的起源。

著录项

  • 来源
    《Journal of Asian earth sciences》 |2020年第15期|104225.1-104225.17|共17页
  • 作者

  • 作者单位

    PSL Res Univ Lab Geol Ecole Normale Super CNRS UMR 8538 24 Rue Lhomond F-75005 Paris France;

    Sorbonne Univ Inst Sci Terre Paris CNRS INSU ISTeP UMR 7193 F-75005 Paris France;

    Univ Utrecht Dept Earth Sci POB 80-021 NL-3508 TA Utrecht Netherlands;

    Univ Toulouse 3 OMP GET 14 Ave Edouard Belin F-31400 Toulouse France;

    PSL Res Univ Lab Geol Ecole Normale Super CNRS UMR 8538 24 Rue Lhomond F-75005 Paris France|Sorbonne Univ Inst Sci Terre Paris CNRS INSU ISTeP UMR 7193 F-75005 Paris France;

    Univ Paris Sud Univ Paris Saclay CNRS GEOPS F-91405 Orsay France;

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

    Transform boundaries; Arabian Sea; Masirah ophiolites;

    机译：改变边界;阿拉伯海;Masirah蛇绿岩;

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