MARGINS/GeoPRISMS Post-Doctoral Fellowship Research: Evolution of Sediment Physical Properties in the Nankai Subduction Zone and Implications for the Updip Limit of Seismogenesis

MARGINS/GeoPRISMS 博士后研究：南开俯冲带沉积物物理性质的演化及其对地震发生上倾极限的影响

基本信息

批准号：
1049591
负责人：
Demian Saffer
金额：
$ 16.59万
依托单位：
Pennsylvania State Univ University Park
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2011
资助国家：
美国
起止时间：
2011-03-01 至 2014-02-28
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1049591&HistoricalAwards=false
关键词：
MARGINS GeoPRISMS Post Doctoral Fellowship

项目摘要

Abstract Funds are provided for a post-doctoral study of deformation and slip behaviors in subduction systems by an experimental approach combined with seismic data and microstructure observations. The PIs will conduct friction experiments on smectite and illite at elevated temperature and measure the acoustic wave velocities on sediment core samples at different stress states. Results of the friction experiments will be used to further test the hypothesis of smectite-illite transition for updip limits of seismicity. The measurements of acoustic wave velocities at different stress states will allow the PIs to estimate the in-situ stress states and pore pressure in subduction systems by incorporating with seismic data. Samples and data from the IODP NanTroSEIZE transect area will be used to investigate the in situ stress and pore pressure conditions. Broader ImpactsThe award will support a young female researcher as a MARGINS/GeoPRISMS postdoctoral fellow. The proposed research aims to understand the evolution of slip behavior at the upper limit of the seismogenic zone and the deformation mechanisms in subduction zone fault systems and accretionary prisms. The focal points of the proposed study are also aligned with key questions of the Subduction Cycles and Deformation initiative within the new GeoPRISMS program. Understanding the mechanics and in situ conditions of faulting deformation at subduction plate boundaries has both scientific and social significance in terms of earthquake prediction and disaster prevention.

通过实验方法结合地震数据和微观结构观察，为俯冲系统中的变形和滑移行为提供了抽象资金。 PIS将在温度升高时对蒙蒂特和伊利石进行摩擦实验，并测量不同应力状态下沉积物核心样品的声波速度。摩擦实验的结果将用于进一步检验蒙奇特硅粉转变的假设，以实现地震性的更新限制。在不同应力状态下的声波速度的测量将使PI通过与地震数据纳入俯冲系统中的原位应力状态和孔压力。来自IODP NANTROSEIZE样带区域的样品和数据将用于研究原位应力和孔隙压力条件。更广泛的影响奖将支持一位年轻的女性研究人员作为博士后研究员的边缘/地理位主义。拟议的研究旨在了解地震区上限上的滑动行为的演变以及俯冲带系统断层系统和增生棱镜中的变形机制。拟议的研究的焦点还与新的地理化主义计划中的俯冲周期和变形计划的关键问题保持一致。在地震预测和预防灾难方面，了解俯冲板边界上断层变形的机制和原位条件既具有科学和社会意义。