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Holocene turbidites record earthquake supercycles at a slow-rate plate boundary

2015; Geological Society of America; Volume: 43; Issue: 4 Linguagem: Inglês

10.1130/g36170.1

1943-2682

Gueorgui Ratzov, Antonio Cattaneo, Nathalie Babonneau, Jacques Déverchère, K. Yelles, Rabah Bracène, F. Courboulex,

Geological and Geochemical Analysis

Research Article| April 01, 2015 Holocene turbidites record earthquake supercycles at a slow-rate plate boundary Gueorgui Ratzov; Gueorgui Ratzov 1Université de Brest, CNRS UMR 6538, Domaines Océaniques, IUEM, 29280 Plouzané, France2IFREMER, Géosciences Marines–EDROME, 29280 Plouzané, France *Current address: Géoazur, Université de Nice/Sophia-Antipolis, CNRS, Observatoire de la Côte d'Azur, 06560 Valbonne, France. Search for other works by this author on: GSW Google Scholar Antonio Cattaneo; Antonio Cattaneo 2IFREMER, Géosciences Marines–EDROME, 29280 Plouzané, France Search for other works by this author on: GSW Google Scholar Nathalie Babonneau; Nathalie Babonneau 1Université de Brest, CNRS UMR 6538, Domaines Océaniques, IUEM, 29280 Plouzané, France Search for other works by this author on: GSW Google Scholar Jacques Déverchère; Jacques Déverchère 1Université de Brest, CNRS UMR 6538, Domaines Océaniques, IUEM, 29280 Plouzané, France Search for other works by this author on: GSW Google Scholar Karim Yelles; Karim Yelles 3Centre de Recherche en Astronomie Astrophysique et Géophysique, 16006 Algiers, Algeria Search for other works by this author on: GSW Google Scholar Rabah Bracene; Rabah Bracene 4SONATRACH Exploration, 35000 Boumerdès, Algeria Search for other works by this author on: GSW Google Scholar Françoise Courboulex Françoise Courboulex 5Université de Nice/Sophia-Antipolis, CNRS, IRD, Observatoire de la Côte d'Azur, Géoazur UMR 7329, 250 rue Albert Einstein, 06560 Valbonne, France Search for other works by this author on: GSW Google Scholar Author and Article Information Gueorgui Ratzov *Current address: Géoazur, Université de Nice/Sophia-Antipolis, CNRS, Observatoire de la Côte d'Azur, 06560 Valbonne, France. 1Université de Brest, CNRS UMR 6538, Domaines Océaniques, IUEM, 29280 Plouzané, France2IFREMER, Géosciences Marines–EDROME, 29280 Plouzané, France Antonio Cattaneo 2IFREMER, Géosciences Marines–EDROME, 29280 Plouzané, France Nathalie Babonneau 1Université de Brest, CNRS UMR 6538, Domaines Océaniques, IUEM, 29280 Plouzané, France Jacques Déverchère 1Université de Brest, CNRS UMR 6538, Domaines Océaniques, IUEM, 29280 Plouzané, France Karim Yelles 3Centre de Recherche en Astronomie Astrophysique et Géophysique, 16006 Algiers, Algeria Rabah Bracene 4SONATRACH Exploration, 35000 Boumerdès, Algeria Françoise Courboulex 5Université de Nice/Sophia-Antipolis, CNRS, IRD, Observatoire de la Côte d'Azur, Géoazur UMR 7329, 250 rue Albert Einstein, 06560 Valbonne, France Publisher: Geological Society of America Received: 12 Aug 2014 Revision Received: 10 Jan 2015 Accepted: 29 Jan 2015 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2015 Geological Society of America Geology (2015) 43 (4): 331–334. https://doi.org/10.1130/G36170.1 Article history Received: 12 Aug 2014 Revision Received: 10 Jan 2015 Accepted: 29 Jan 2015 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Search Site Citation Gueorgui Ratzov, Antonio Cattaneo, Nathalie Babonneau, Jacques Déverchère, Karim Yelles, Rabah Bracene, Françoise Courboulex; Holocene turbidites record earthquake supercycles at a slow-rate plate boundary. Geology 2015;; 43 (4): 331–334. doi: https://doi.org/10.1130/G36170.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Ongoing evidence for earthquake clustering calls for records of numerous earthquake cycles to improve seismic hazard assessment, especially where recurrence times overstep historical records. We show that most turbidites emplaced at the Africa-Eurasia plate boundary off west Algeria over the past ∼8 k.y. correlate across sites fed by independent sedimentary sources, requiring a regional trigger. Correlation with paleoseismic data inland and ground motion predictions support that M ∼7 earthquakes have triggered the turbidites. The bimodal distribution of paleo-events supports the concepts of earthquake supercycles and rupture synchronization between nearby faults: 13 paleo-earthquakes underpin clusters of 3–6 events with recurrence intervals of ∼300–600 yr, separated by periods of quiescence of ∼1.6 k.y. without major events on other faults over the study area. This implies broad phases of strain loading alternating with phases of strain release. Our results suggest that fault slip rates are time dependent and call for revising conventional seismic hazard models. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.