Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4118
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dc.contributor.authorallAudemard, F. A. M.; FUNVISIS - Caracasen
dc.contributor.authorallOllarves, R.; FUNVISIS - Caracasen
dc.contributor.authorallBechtold, M.; FUNVISIS - Caracasen
dc.contributor.authorallDiaz, G.; FUNVISIS - Caracasen
dc.contributor.authorallBeck, C.; Université de Savoie - Franceen
dc.contributor.authorallCarrillo, E.; Universidad Central de Venezuelaen
dc.contributor.authorallPantosti, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallDiderix, H.; NMCP - The Netherlandsen
dc.date.accessioned2008-10-23T07:42:22Zen
dc.date.available2008-10-23T07:42:22Zen
dc.date.issued2008en
dc.identifier.urihttp://hdl.handle.net/2122/4118en
dc.description.abstractThe Mesa del Caballo trench assessment confirms the Holocene activity of the main strand of the Boconó fault at the Apartaderos pull-apart basin. Fifteen earthquakes, of which fourteen have been radiocarbon dated, have been recognized, spanning the last 20,500 yr. Recurrence intervals of these ≥7 magnitude events are variable. The dominant mode of recurrence is 400–450 yr, and the second one is 900 yr. Eventually some events are 1400–1800 yr apart. We suspect that our seismic record may be incomplete. This could be easily justified by several conditions: most of the earthquake recognitions is based on open-crack filling and they superpose spatially (eventually masking or destroying older fills), trenching may miss some events because the fault is made of en echelon Riedel shears, and a short return period may lead to faint differences between paleosoils few hundreds years of age apart. This trench also images an older activity of the fault, as evidenced by plentiful earthquake-triggered liquefaction features, as well as slumping and rotational sliding. By comparing paleoseismic results between the Morro de Los Hoyos and Mesa del Caballo trenches, it appears that both fault strands bounding the Apartaderos pull-apart basin move simultaneously. Besides, the main strand also coseismically slips twice in between those common events. In other words, the seismic scenario could be that the northern strand recurs every 1200–1350 yr while the southern does every 400– 450 yr. This is also in agreement with a respective slip share of 25 and 75% of the 9–10 mm/yr average slip of the Boconó fault in the Mérida Andes central sector.en
dc.language.isoEnglishen
dc.publisher.nameElsevieren
dc.relation.ispartofTectonophysicsen
dc.relation.ispartofseries1-4/459 (2008)en
dc.subjectActive faultsen
dc.subjectSouth Americaen
dc.subjectPaleoseismologyen
dc.titleTrench investigation on the main strand of the Boconó fault in its central section, at Mesa del Caballo, Mérida Andes, Venezuelaen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber38-53en
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismologyen
dc.identifier.doi10.1016/j.tecto.2007.08.020en
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dc.description.obiettivoSpecifico3.2. Tettonica attivaen
dc.description.journalTypeJCR Journalen
dc.description.fulltextreserveden
dc.contributor.authorAudemard, F. A. M.en
dc.contributor.authorOllarves, R.en
dc.contributor.authorBechtold, M.en
dc.contributor.authorDiaz, G.en
dc.contributor.authorBeck, C.en
dc.contributor.authorCarrillo, E.en
dc.contributor.authorPantosti, D.en
dc.contributor.authorDiderix, H.en
dc.contributor.departmentFUNVISIS - Caracasen
dc.contributor.departmentFUNVISIS - Caracasen
dc.contributor.departmentFUNVISIS - Caracasen
dc.contributor.departmentFUNVISIS - Caracasen
dc.contributor.departmentUniversité de Savoie - Franceen
dc.contributor.departmentUniversidad Central de Venezuelaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentNMCP - The Netherlandsen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptFUNVISIS - Caracas-
crisitem.author.deptFUNVISIS - Caracas-
crisitem.author.deptFUNVISIS - Caracas-
crisitem.author.deptUniversité de Savoie - France-
crisitem.author.deptUniversidad Central de Venezuela-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptNMCP - The Netherlands-
crisitem.author.orcid0000-0002-8042-9792-
crisitem.author.orcid0000-0001-7308-9104-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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