CAREER: Re-evaluating the evolution of the southern San Andreas Fault along its restraining bend from Holocene to Mid-Quaternary timescales via 36Cl/10Be burial and cosmogenic...

职业：通过 36Cl/10Be 埋藏和宇宙成因重新评估圣安德烈亚斯断层南部沿其从全新世到第四纪中期时间尺度的限制弯曲的演化...

基本信息

批准号：
1848547
负责人：
Kimberly Blisniuk
金额：
$ 65.81万
依托单位：
San Jose State University Foundation
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-06-01 至 2025-05-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1848547&HistoricalAwards=false
关键词：
CAREER Re evaluating evolution southern

项目摘要

This study will re-evaluate the seismic hazard potential of individual faults that make up the southern San Andrea Fault system, in particular the potential hazard associated with a newly identified fault of the San Andreas Fault system. The investigation will document and characterize the amount of movement along this newly identified fault over multiple timescales, to better understand its displacement history and evolution relative to other faults in the region. To accomplish this end goal, the application of a new dating technique, 36Cl/10Be burial dating, will be developed. The societal impact of this study is high because the results will help refine earthquake hazard models that forecast the potential of future earthquakes and their recurrence in California. This study of seismogenic faults will then be integrated into a place-based mentoring program for undergraduate students, Promoting Undergraduate Research Experiences (PURE) in Geology at San Jose State University (SJSU). The program will provide opportunities for students to investigate fault processes and their associated hazard. The development and application of the 36Cl/10Be burial dating technique in sediment over the 200,000 to 700,000 year age range will expand the capability and capacity of earth scientists to quantify geologic processes, such as rates of deformation of lateral faults, fold and thrust belts and sedimentary successions worldwide over a timescale missing in most geologic histories. Accordingly, quantifying the continuous displacement history of faults and fault zones into mid-Quaternary timescales will provide new insights into the behavior of continental strike slip faults, in particular the San Andreas Fault. Such data are critical to understanding the evolution of fault systems. Detailed field and geochronologic data at multiple locations and timescales provide important constraints and boundary conditions that can be applied to geophysical models of plate boundary strain, faults, dynamic earthquake rupture models, seismologic models and models assessing seismic hazard. Funding for the project is provided by the EAR Tectonics Program and the GEO Prediction of and Resilience against Extreme Events (PREEVENTS) Program.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这项研究将重新评估构成Southeral San Andrea断层系统的单个断层的地震危害潜力，特别是与San Andreas断层系统新确定的断层相关的潜在危害。该调查将记录并表征沿着多个时间尺度上新确定的故障的运动量，以更好地了解其位移历史和演变相对于该地区的其他断层。为了实现这一最终目标，将开发一种新的约会技术，即36cl/10be埋葬约会。这项研究的社会影响很高，因为结果将有助于完善地震危害模型，以预测未来地震及其在加利福尼亚州复发的潜力。这项对地震遗传缺陷的研究将纳入针对本科生的基于地点的指导计划，从而促进圣何塞州立大学（SJSU）地质学的本科研究经验（PURE）。该计划将为学生提供调查故障流程及其相关危害的机会。在200,000至700,000岁的年龄范围内，36CL/10BE埋葬约会技术在沉积物中的开发和应用将扩大地球科学家量化地质过程的能力和能力，例如在大多数地球历史中，全世界缺失的横向断层，折叠和推力带的变形率，折叠和推力带和沉积物连续性的变形率。因此，将断层和断层区域中的连续位移病史量化为期间时间尺度，将为大陆罢工滑移断层的行为，尤其是San Andreas断层提供新的见解。这样的数据对于理解故障系统的演变至关重要。多个位置和时间尺度上的详细场和地质数据提供了重要的约束和边界条件，可以应用于板边界应变，故障，动态地震破裂模型，地震学模型和评估地震危险模型的地球物理模型。该项目的资金由EAR Tectonics计划以及针对极端事件（预先审核）计划的GEO预测和韧性提供的资金。该奖项反映了NSF的法定任务，并被认为是通过基金会的智力优点和更广泛影响的审查标准通过评估来通过评估来支持的。