Investigating the resetting of IRSL signals in beach cobbles and their potential for rock surface dating of marine terraces in Northern Chile

Brill, Dominik; Ageby, Lucas; Obert, Christina; Hollerbach, Rolf; Duval, Mathieu; Kolb, Thomas; Bartz, Melanie

doi:10.1016/j.margeo.2021.106692

Cited by 5 publications

(1 citation statement)

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“…When a bedrock fault surface is exposed to light due to fault slip, the OSL signal, which is initially uniform within the rock sample, will decrease to progressively greater depths. These OSL‐DP methods are sensitive to exposure ages on timescales of 10 1−4 years and bleaching depths of 10 0−1 mm spatial scale (Brill et al., 2022; Lehmann et al., 2020; Sohbati et al., 2018), thereby providing a novel tool for bedrock fault scarp studies.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach for Reconstructing Slip Histories for Bedrock Fault Scarps Using Rock Surface Luminescence Dating

Luo

Chen

Owen

et al. 2022

Geophysical Research Letters

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Reconstructing and quantifying fault slip is essential for better understanding of the dynamics of faulting and seismic hazard assessment (Avouac, 2015;Harris, 2017). Distinguishing and estimating seismic or aseismic fault slip on geologic timescales (specifically ∼10 1−4 years) is challenging due to the lack of historical, geodetic, remote sensing data extending beyond a few decades or centuries. Moreover, seismic or aseismic slip record in landform and sedimentary archives over such timescales is often incomplete because geologic processes, including later earthquakes, which may destroy the evidence of earlier earthquakes (McCalpin & Nelson, 2009). However, bedrock fault scarps provide one of the best archives for studying past earthquakes and determining the nature and rates of fault slip because they are resistant to erosion and relate directly to a particular fault.Over the past few decades, exposure histories of bedrock fault scarps have been inferred by methods based on the accumulation of terrestrial cosmogenic nuclides (TCNs; Williams et al., 2017;Zreda & Noller, 1998). However, these methods have significant challenges for earthquakes with short recurrence intervals that lay within the uncertainty of the dating and the difficulties of measuring the extremely low concentrations of TCNs in young (10 1−2 years) bedrock fault scarps (Zreda & Noller, 1998). Moreover, it is hard to distinguish discontinuous points in the profiles of TCN concentration versus fault scarp height because the fault displacements for some

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Section: Introductionmentioning

confidence: 99%