Abstract The seismogenic potential of active faults for seismic hazard analyses are typically constrained using slip rates. These parameters, derived from numerically dated Quaternary deposits and landforms, have a critical impact on seismic hazard estimates with relevant societal and economic implications. Recently published geomorphological and paleoseismic investigations on active normal faults in the intraplate Iberian Chain (Spain), based on OSL ages from a now closed commercial laboratory, indicate anomalously high slip rates and paleoearthquake frequencies and extremely high fluvial incision rates. Parameters derived from those numerical ages have been used for seismic hazard assessments at critical facilities. This work revisits the chronology of Quaternary deposits associated with several faults applying various geochronological methods: Electro Spin Resonance (ESR), AMS Radiocarbon, Optically Stimulated Luminescence (OSL) and U-series dating. The totality of the new numerical ages is markedly different from the previously published OSL ages. The thirteen new ESR, OSL and U-series ages are systematically between three and six times older than the previous OSL ages. These data strongly suggest that previous ages overestimate the activity of the faults and seismic hazard in the region. The lack of validity of the revisited OSL analyses is attributed to inadequate dating procedures. Slip rates calculated with the new numerical ages are consistent with the slip rates estimated using Pliocene markers in the Iberian Chain and the slip rates published for other normal faults in eastern Spain. The new geochronological data also indicate reasonable fluvial incision rates, comparable with those estimated in nearby regions. The findings presented in this work have also implications for other Quaternary geomorphological studies in Spain based on potentially non-valid OSL ages.

中文翻译：

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重新审视西班牙东北部伊比利亚链第四纪断层的滑动率。地貌和地震灾害影响

摘要 用于地震危险性分析的活动断层的发震潜力通常使用滑动率进行约束。这些参数来自于数字年代的第四纪沉积物和地貌，对具有相关社会和经济意义的地震危险性估计具有重要影响。最近发表的关于板内伊比利亚链（西班牙）活动正断层的地貌和古地震调查，基于来自现已关闭的商业实验室的 OSL 年龄，表明异常高的滑动率和古地震频率以及极高的河流切割率。从这些数字年龄得出的参数已用于关键设施的地震危险性评估。这项工作使用各种地质年代学方法重新审视了与几个断层相关的第四纪沉积物的年代学：电自旋共振 (ESR)、AMS 放射性碳、光激发光 (OSL) 和 U 系列测年。新数字年龄的总体与先前公布的 OSL 年龄明显不同。十三个新的 ESR、OSL 和 U 系列年龄系统地比以前的 OSL 年龄大三到六倍。这些数据有力地表明，以前的时代高估了该地区断层的活动和地震危险。重新审视的 OSL 分析缺乏有效性归因于不适当的测年程序。使用新数值年龄计算的滑动速率与使用伊比利亚链中上新世标记估计的滑动速率以及西班牙东部其他正断层公布的滑动速率一致。新的年代学数据也表明了合理的河流切割率，与附近地区的估计值相当。这项工作中提出的发现也对西班牙基于潜在无效 OSL 年龄的其他第四纪地貌研究产生了影响。