Physics and structure of subduction-induced geodynamic transients in terms of reflection seismic and micro-seismological signatures

根据反射地震和微地震特征研究俯冲引起的地球动力学瞬变的物理和结构

• 批准号: 142091950
• 负责人: Professor Dr. Serge A. Shapiro
• 金额: --
• 依托单位: Helmholtz-Zentrum Potsdam - Deutsches GeoForschungsZentrum (GFZ)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/142091950?language=en
• 关键词: Physics; structure; subduction; induced; geodynamic

We propose a combination of active and passive seismic studies in order to image and to characterize the structural inventory and the processes that occur in the vicinity of large scale fault zones in the Central Andean forearc system (North Chile), faults which are expected to have a relationship to transient processes in the subduction earthquake cycle. The overall aim of this project is to provide a reflection seismic frame and the related seismicity patterns for understanding the interaction between on the one hand, faults and seismic scattering structures (e.g., physical and structural heterogeneities, like zones of enhanced porosity filled with fluids and/or melts) in the crust and on the other hand, strain-, stress-, pore pressure-, temperature-, friction-, diffusion- and degassing-related transients (e.g., spatio-temporal complexity of seismicity distribution and tremors) caused by the subduction process. Therefore our aim is not only to identify and analyze 4D-transients but also to characterize the subsurface environment in which they occur.

我们提出了主动和被动地震研究的结合，以成像和表征发生在安第斯中部前弧系统（智利北部）的大型断裂带附近的结构盘存和过程，这些断层被认为与俯冲地震周期中的瞬变过程有关。该项目的总体目标是提供一个反射地震框架和相关的地震活动性模式，以了解地壳中断层和地震散射结构（例如，物理和结构的非均质性，如充满流体和/或熔体的增强孔隙带）之间的相互作用，以及另一方面，应变、应力、孔隙压力、温度、摩擦、扩散和脱气相关的瞬态(例如：俯冲过程引起的地震活动性分布的时空复杂性和地震。因此，我们的目标不仅是识别和分析4d瞬变，而且还表征它们发生的地下环境。

项目成果

Microseismic reflection imaging of the Central Andean crust

安第斯山脉中部地壳的微震反射成像

• DOI: 10.1093/gji/ggv530
• 发表时间: 2016
• 期刊: Geophysical Journal International
• 影响因子: 2.8
• 作者: Schmelzbach;J. Kummerow;P. Wigger;A. Reshetnikov;P. Salazar;S. A. Shapiro
• 通讯作者: S. A. Shapiro

High-resolution image of the North Chilean subduction zone: seismicity, reflectivity and fluids

智利北部俯冲带的高分辨率图像：地震活动、反射率和流体

• DOI: 10.1093/gji/ggu084
• 发表时间: 2014
• 期刊: Geophysical Journal International
• 影响因子: 2.8
• 作者: BlochW;Kummerow;Salazar;Wigger;Shapiro
• 通讯作者: Shapiro

Seismic imaging of a megathrust splay fault in the North Chilean subduction zone (Central Andes)

智利北部俯冲带（安第斯山脉中部）巨型逆冲张开断层的地震成像

• DOI: 10.1016/j.tecto.2016.02.039
• 发表时间: 2016
• 期刊: Tectonophysics
• 影响因子: 2.9
• 作者: Storch;Schmelzbach;Wigger
• 通讯作者: Wigger