...
  • 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 >Present-day crustal deformation along the Philippine Fault in Luzon, Philippines
【24h】

Present-day crustal deformation along the Philippine Fault in Luzon, Philippines

机译：菲律宾吕宋岛菲律宾断层的现今地壳形变

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 Philippine Fault results from the oblique convergence between the Philippine Sea Plate and the Sun-da Block/Eurasian Plate. The fault exhibits left-lateral slip and transects the Philippine archipelago from the northwest corner of Luzon to the southeast end of Mindanao for about 1200 km. To better understand fault slip behavior along the Philippine Fault, eight GPS surveys were conducted from 1996 to 2008 in the Luzon region. We combine the 12-yr survey-mode GPS data in the Luzon region and continuous GPS data in Taiwan, along with additional 15 International GNSS Service sites in the Asia-Pacific region, and use the GAMIT/GLOBK software to calculate site coordinates. We then estimate the site velocity from position time series by linear regression. Our results show that the horizontal velocities with respect to the Sunda Block gradually decrease from north to south along the western Luzon at rates of 85-49 mm/yr in the west-northwest direction. This feature also implies a southward decrease of convergence rate along the Manila Trench. Significant internal deformation is observed near the Philippine Fault. Using a two dimensional elastic dislocation model and GPS velocities, we invert for fault geometries and back-slip rates of the Philippine Fault. The results indicate that the back-slip rates on the Philippine Fault increase from north to south, with the rates of 22, 37 and 40 mm/yr, respectively, on the northern, central, and southern segments. The inferred long-term fault slip rates of 24-40 mm/yr are very close to back-slip rates on locked fault segments, suggesting the Philippine Fault is fully locked. The stress tensor inversions from earthquake focal mechanisms indicate a transpressional regime in the Luzon area. Directions of σ1 axes and maximum horizontal compressive axes are between 90° and 110°, consistent with major tectonic features in the Philippines. The high angle between σ1, axes and the Philippine Fault in central Luzon suggests a weak fault zone possibly associated with fluid pressure.
机译：菲律宾断层是菲律宾海板块与日大区块/欧亚板块之间的倾斜交汇造成的。断层表现出左滑，并从吕宋岛的西北角到棉兰老岛的东南端横贯菲律宾群岛约1200公里。为了更好地了解菲律宾断裂带的断层滑动行为，1996年至2008年在吕宋地区进行了八次GPS测量。我们将吕宋地区的12年调查模式GPS数据与台湾地区的连续GPS数据以及亚太地区的另外15个国际GNSS服务站点结合在一起，并使用GAMIT / GLOBK软件计算站点坐标。然后，我们通过线性回归从位置时间序列估算站点速度。我们的结果表明，相对于the他区块的水平速度沿着吕宋岛的西部方向从北向南逐渐减小，沿西北-西北方向的速率为85-49 mm / yr。该特征还意味着沿着马尼拉海沟的收敛速度向南降低。在菲律宾断层附近观察到明显的内部变形。使用二维弹性位错模型和GPS速度，我们反演了菲律宾断层的断层几何形状和后滑速率。结果表明，菲律宾断层的后滑速率从北向南增加，在北部，中部和南部段分别为22、37和40 mm / yr。推断的24-40 mm / yr的长期断层滑动率非常接近锁定断层段的后向滑动率，这表明菲律宾断层已完全锁定。地震震源机制的应力张量反演表明吕宋地区有超压状态。 σ1轴和最大水平压缩轴的方向在90°至110°之间，与菲律宾的主要构造特征一致。 σ1轴与吕宋中部的菲律宾断层之间的夹角较大，表明该断层带较弱，可能与流体压力有关。

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