气候变化领域集成服务门户(CCPortal): Stability Analysis of Fragile Rock Pillars and Insights on Fault Activity in the Negev, Israel

CCPortal

DOI	10.1029/2019JB019269
	Stability Analysis of Fragile Rock Pillars and Insights on Fault Activity in the Negev, Israel
	Finzi Y.; Ganz N.; Dor O.; Davis M.; Volk O.; Langer S.; Arrowsmith R.; Tsesarsky M.
发表日期	2020
ISSN	21699313
卷号	125 期号:12
英文摘要	Fragile geologic features (FGFs) are used as negative indicators of strong ground motion. By evaluating the stability of FGFs and determining their age, it is possible to constrain the local maximum seismic ground acceleration that has occurred during their lifetime. This methodology was originally developed to analyze precariously balanced rocks (a subset of FGFs) and has been used to assess long-term fault activity and improve seismic hazard analyses. In the Negev desert of Israel, several in situ, slender rock pillars exhibit natural frequencies within the range of seismic waves (1–10 Hz) and therefore constitute an important FGF subset. However, the motion of such pillars may be complex with an initial stage of swaying followed by basal detachment, rocking and toppling, or failure within the pillar. To demonstrate that pillar stability can be analyzed using the existing FGF methodology, we show that the tensional stresses developed at the base of a pillar swaying at its fundamental modes of motion are comparable or larger than the typical tensile strength of Negev pillars. Finally, we demonstrate how a newly documented data set of Negev FGFs can be used to provide new insights on fault activity along the Negev-Sinai Shear Zone and the Arava Fault. Assuming a plausible range of motion amplification, the stability analysis of long-standing FGFs yields significant constraints on fault seismicity parameters (Mmax < 7 for a section of the Arava Fault). Extending the regional data set would provide important insights for regional seismic hazard along the Dead Sea Transform. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Dead Sea Transform; fault activity; free standing pillars; long-term seismicity; PBR; seismic hazard
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187451
作者单位	Dead Sea and Arava Science Center, Mitzpe Ramon, Israel; Department of Geological and Environmental Sciences, Ben Gurion University of the Negev, Beer Sheva, Israel; Ory Dor Geology for Planning and Design, Beit Keshet, Israel; Ecolog Engineering, Rehovot, Israel; Fioscope GmbH, Freital, Germany; School of Earth and Space Exploration, Arizona State University, Phoenix, AZ, United States
推荐引用方式 GB/T 7714	Finzi Y.,Ganz N.,Dor O.,et al. Stability Analysis of Fragile Rock Pillars and Insights on Fault Activity in the Negev, Israel[J],2020,125(12).
APA	Finzi Y..,Ganz N..,Dor O..,Davis M..,Volk O..,...&Tsesarsky M..(2020).Stability Analysis of Fragile Rock Pillars and Insights on Fault Activity in the Negev, Israel.Journal of Geophysical Research: Solid Earth,125(12).
MLA	Finzi Y.,et al."Stability Analysis of Fragile Rock Pillars and Insights on Fault Activity in the Negev, Israel".Journal of Geophysical Research: Solid Earth 125.12(2020).