传入的多角断层系统对俯冲区和缓慢滑动行为的影响
Maomao Wang1, Philip M Barnes2, Demian Saffer3
1College of Oceanography, Hohai University, Nanjing, Jiangsu, China.
Science advances
|July 4, 2025
概括
潜流板中的多边形断层系统 (PFS) 可以演变成推力断层,影响大推力滑动. 这些断层也可能充当流体管道,影响地震活动和应力异质性.
科学领域:
- 地质物理学 地质物理学
- 构造学 构造学 构造学 构造学
- 地震学 地震学
背景情况:
- 俯冲区的输入属性显著影响大推力滑动行为.
- 多边形断层系统 (PFSs) 在Hikurangi边缘和南开峡谷的俯冲输入序列中观察到.
- 进入的PFS对潜水带的机械和水文影响可能是相当大的.
研究的目的:
- 为了研究将多边形断层系统 (PFS) 输入到增积中后的潜水效应.
- 了解PFS如何演变为主要推力故障,并影响板接口过程.
主要方法:
- 离散元素建模与三维地震解释的整合.
- 从潜伏区的地震和电磁数据的分析.
主要成果:
- 降压PFS可以被重新激活并演变为主要推力断层,典型的陷与容易被重新激活的陷重叠.
- PFS可以作为沿板面接口的液体泄漏管道.
- PFS与被破坏的层,减少剪切应力,以及在巨型推力沿线增强的几何和应力异质性相关.
结论:
- 多边形断层系统 (PFS) 在俯冲区动态中发挥着重要的,以前未被认可的作用.
- PFS通过影响流体流动和应力异质性,有助于浅地缓慢的地震现象.
- PFS的演变和机械效应是理解巨型冲击滑动行为的关键因素.
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