Articles | Volume 15, issue 11
https://doi.org/10.5194/se-15-1343-2024
https://doi.org/10.5194/se-15-1343-2024
Research article
 | 
14 Nov 2024
Research article |  | 14 Nov 2024

The protocataclasite dilemma: in situ 36Cl and REE-Y lessons from an impure limestone fault scarp at Sparta, Greece

Bradley W. Goodfellow, Marc W. Caffee, Greg Chmiel, Ruben Fritzon, Alasdair Skelton, and Arjen P. Stroeven

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Cited articles

Agosta, F. and Aydin, A.: Architecture and deformation mechanism of a basin bounding normal fault in Mesozoic platform carbonates, central Italy, J. Struct. Geol., 28, 1445–1467, 2006. 
Armijo, R., Lyon-Caen, H., and Papanastassiou, D.: A possible normal-fault rupture for the 464 BC Sparta earthquake, Nature, 351, 137–139, 1991. 
Beck, J., Wolfers, S., and Roberts, G. P.: Bayesian earthquake dating and seismic hazard assessment using chlorine-36 measurements (BED v1), Geosci. Model Dev., 11, 4383–4397, https://doi.org/10.5194/gmd-11-4383-2018, 2018. 
Bello, S., Perna, M. G., Consalvo, A., Brozzetti, F., Galli, P., Cirillo, D., Andrenacci, C., Tangari, A. C., Carducci, A., Menichetti, M., Lavecchia, G., Stoppa, F., and Rosatelli, G.: Coupling rare earth element analyses and high-resolution topography along fault scarps to investigate past earthquakes: A case study from the Southern Apennines (Italy), Geosphere, 19, 1348–1371, 2023. 
Benedetti, L., Finkel, R., Papanastassiou, D., King, G., Armijo, R., Ryerson, F., Farber, D., and Flerit, F.: Post-glacial slip history of the Sparta fault (Greece) determined by 36Cl cosmogenic dating: Evidence for non-periodic earthquakes, Geophys. Res. Lett., 29, 1246, https://doi.org/10.1029/2001GL014510, 2002. 
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Short summary
Reconstructions of past earthquakes are useful to assess earthquake hazard risk. We assess a limestone scarp exposed by earthquakes along the Sparta Fault, Greece, using 36Cl and rare-earth elements and yttrium (REE-Y). Our analyses indicate an increase in the average scarp slip rate from 0.8–0.9 mm yr-1 at 6.5–7.7 kyr ago to 1.1–1.2 mm yr-1 up to the devastating 464 BCE earthquake. REE-Y indicate clays in the fault scarp; their potential use in palaeoseismicity would benefit from further study.