DataSheet1_Paleoseismology of the Marquesado-La Rinconada thrust system, Eastern Precordillera of Argentina.PDF

Excavated trenches at two sites across the Marquesado–La Rinconada fault system along the eastern Precordilleran front south of San Juan, Argentina, reveal the earthquake history of this rapidly urbanizing region. Interpretation of earthquakes is based on both the generation of colluvial wedges and upward fault terminations, as well as folding events in fine-grained alluvium ponded behind upslope-facing fault scarps. The ages of the past five interpreted earthquakes at the Loma Negra site are E1 at 2.8 ± 2.8 ka, E2 at 7.1 ± 1.5 ka, E3 at 9.6 ± 1.3 ka, E4 at 14.4 ± 2.1 ka, and E5 at 17.2 ± 3.1 ka. At the Jejenes sites, we documented event ages of 2.7 ± 0.1 ka, 3.9 ± 0.6 ka, 5.9 ± 1.3 ka, and 11.4 ± 4 ka. These results indicate that the recurrence interval along the Marquesado–La Rinconada fault zone averages several thousand years. The inferred displacements at the Jejenes site are about 1.1 m for E1, E3, and E4 and 2.1 m for event E2, whereas the displacements at Loma Negra averaged about 1 m, but the most recent event displays less slip. Notably, the older events seem to have been larger and emergent, whereas the youngest event appears to have been smaller and blind in the ponded sediment; this may partially explain the poor expression of classic colluvial wedges associated with some events. Despite the fact that active surface faulting has an uncertain relationship with the primary seismic sources at depth in the crust, past and future events of Mw ∼7.5 are consistent with the length scale of active deformation, the ∼1–2 m slip per event scale of these ruptures, and the size of historical earthquakes.</p

Dataset: Improved geological slip rate estimations in the complex Alhama de Murcia Fault zone (SE Iberia) and its implications for fault behavior

This repository contains datasets used for the article "Improved geological slip rate estimations in the complex Alhama de Murcia Fault zone (SE Iberia) and its implications for fault behaviour" published in Tectonics. The dataset includes two zip files: A. Uninterpreted_trenches: This folder contains PDF files with uninterpreted photologs of all the trenches carried out in the paleoseismic survey of the study. Each file contains all the trenches from a paleoseismic site, as named in the paper. B. MATLAB_codes: This folder contains MATLAB codes to compute the probability density functions of the slip rates, based on fault slips and numerical dates obtained in the trenches. These codes are intented to be run using the code by Zechar and Frankel (2009) and are written based on the format designed by these authors. A separate code for each trench and slip component is provided. To read and edit these files use MATLAB or an open source code editor such as Spyder. The data from this article is part of the doctoral thesis of Octavi Gómez-Novell developed at the University of Barcelona. You can findn it publicly available at: http://hdl.handle.net/2445/183755 *For any further requests or suggestions, please write to the corresponding author of the publication, Octavi Gómez-Novell ([email protected]). </p