• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earth, planets and space: EPS >Shear-wave splitting analysis of the upper mantle at the Niigata-Kobe Tectonic Zone with the data of the Joint Seismic Observations at NKTZ
【24h】

Shear-wave splitting analysis of the upper mantle at the Niigata-Kobe Tectonic Zone with the data of the Joint Seismic Observations at NKTZ

机译：新泻神户构造带上地幔的剪切波分裂分析及NKTZ联合地震观测资料

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We conducted seismic observations with a spatially high density seismic network at the Niigata-Kobe Tectonic Zone, central Japan. The seismic network was used for the analysis of shear-wave splitting. Large lateral variations were found in the polarization direction data: the northern part of the research area yields polarization directions of NW-SE (Region A), the central part of the research area with the polarization direction of NNE-SSW (Region B), the eastern part of the research area with the polarization direction of NE-SW (Region C), and the southern part of the research area with the polarization direction of E-W (Region D). The polarization directions in Regions B and C could be explained by the preferred orientation of olivine caused by the flow of the subducting Philippine Sea plate. However, the cause of anisotropic region which was related to the heterogeneous structure was also plausible. The polarization direction in Region A might be related to the flow caused by both of the subducting Philippine Sea and Pacific slabs. The polarization direction at the Region D could not be produced by the flow in the wedge and might be related to an anisotropic region beneath the slab. The lateral variation of the polarization direction does not support a model that the NKTZ is a collision region.
机译：我们在日本中部新泻神户构造带进行了具有空间高密度地震网络的地震观测。地震网络用于剪切波分裂的分析。在极化方向数据中发现较大的横向变化：研究区域的北部产生NW-SE的极化方向（区域A），研究区域的中心部分产生NNE-SSW的极化方向（区域B），研究区域的东部具有NE-SW的极化方向（C区），研究区域的南部具有EW的极化方向（D区）。 B区和C区的极化方向可以用俯冲菲律宾海板块流动引起的橄榄石的优选取向来解释。然而，与异质结构有关的各向异性区域的原因也是合理的。 A区的极化方向可能与俯冲菲律宾海和太平洋板块引起的流动有关。区域D中的偏振方向不能由楔中的流动产生，而可能与平板下方的各向异性区域有关。偏振方向的横向变化不支持NKTZ是碰撞区域的模型。

著录项

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