Slip Rate Variation During the Last ?210 ka on a Slow Fault in a Transpressive Regime: The Carrascoy Fault (Eastern Betic Shear Zone, SE Spain)

نویسندگان

چکیده

Fault slip rate variability over time is a crucial aspect for understanding how single faults interact among each other in fault systems. Several studies worldwide evidence the occurrence of high activity periods with clustering events and synchronization faults, followed by long low (super-cycles). The increasing gathering these phenomena making hazard models quickly evolving challenging seismic assessment. However, moderately active systems, determination rates can present large uncertainties, that have to be carefully considered when histories are determined. In this work, we estimate variation last ?210 ky NE segment left-lateral reverse Carrascoy Fault, one main forming Eastern Betic Shear Zone SE Spain. We study two selected field sites where been able measure offsets date sediments along uncertainties. first site shows progressive discordance drawn different calcretes developed on alluvial deposits. vertical throw calculated modeling growth discordance. estimated dating deformed Uranium Series comparing them complete regional calcrete dates database compiled from literature. On second site, analyze geomorphology Upper Pleistocene fans, three incised channels offset fault, providing net ?124 ky. discuss influence factors using data sources. This analysis highlights importance determining an accurate geometry local provide misleading deformation rates. Our results suggest existence disturbed short periods. Such pattern defined Zone, interesting implications seismogenic behavior rest slow within region.

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ژورنال

عنوان ژورنال: Frontiers in Earth Science

سال: 2021

ISSN: ['2296-6463']

DOI: https://doi.org/10.3389/feart.2020.599608