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Late Miocene adakites and Nb-enriched basalts from Vizcaino Peninsula, Mexico: Indicators of East Pacific Rise subduction below southern Baja California?

2001; Geological Society of America; Volume: 29; Issue: 6 Linguagem: Inglês

10.1130/0091-7613(2001)029 2.0.co;2

1943-2682

Alfredo Aguillón‐Robles, Thierry Calmus, Mathieu Benoît, Hervé Bellón, René C. Maury, Joseph Cotten, Jacques Bourgois, François Michaud,

earthquake and tectonic studies

Research Article| June 01, 2001 Late Miocene adakites and Nb-enriched basalts from Vizcaino Peninsula, Mexico: Indicators of East Pacific Rise subduction below southern Baja California? Alfredo Aguillón-Robles; Alfredo Aguillón-Robles 1Unité Mixte de Recherche 6538, Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, F-29280 Plouzané, France, and Instituto de Geología, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico Search for other works by this author on: GSW Google Scholar Thierry Calmus; Thierry Calmus 2Estación Regional del Noreste, Instituto de Geología, Universidad Nacional Autónoma de Mexico, Hermosillo, Mexico Search for other works by this author on: GSW Google Scholar Mathieu Benoit; Mathieu Benoit 3Unité Mixte de Recherche 6538, Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, F-29280 Plouzané, France Search for other works by this author on: GSW Google Scholar Hervé Bellon; Hervé Bellon 3Unité Mixte de Recherche 6538, Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, F-29280 Plouzané, France Search for other works by this author on: GSW Google Scholar René C. Maury; René C. Maury 3Unité Mixte de Recherche 6538, Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, F-29280 Plouzané, France Search for other works by this author on: GSW Google Scholar Joseph Cotten; Joseph Cotten 3Unité Mixte de Recherche 6538, Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, F-29280 Plouzané, France Search for other works by this author on: GSW Google Scholar Jacques Bourgois; Jacques Bourgois 4Laboratoire de Géodynamique et Tectonique, Université Pierre et Marie Curie, F-75252 Paris cedex 05, France Search for other works by this author on: GSW Google Scholar François Michaud François Michaud 5Unité Mixte de Recherche 6526, Université Pierre et Marie Curie, F-06235 Villefranche sur Mer, France Search for other works by this author on: GSW Google Scholar Author and Article Information Alfredo Aguillón-Robles 1Unité Mixte de Recherche 6538, Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, F-29280 Plouzané, France, and Instituto de Geología, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico Thierry Calmus 2Estación Regional del Noreste, Instituto de Geología, Universidad Nacional Autónoma de Mexico, Hermosillo, Mexico Mathieu Benoit 3Unité Mixte de Recherche 6538, Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, F-29280 Plouzané, France Hervé Bellon 3Unité Mixte de Recherche 6538, Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, F-29280 Plouzané, France René C. Maury 3Unité Mixte de Recherche 6538, Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, F-29280 Plouzané, France Joseph Cotten 3Unité Mixte de Recherche 6538, Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, F-29280 Plouzané, France Jacques Bourgois 4Laboratoire de Géodynamique et Tectonique, Université Pierre et Marie Curie, F-75252 Paris cedex 05, France François Michaud 5Unité Mixte de Recherche 6526, Université Pierre et Marie Curie, F-06235 Villefranche sur Mer, France Publisher: Geological Society of America Received: 10 Oct 2000 Revision Received: 21 Feb 2001 Accepted: 03 Mar 2001 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2001) 29 (6): 531–534. https://doi.org/10.1130/0091-7613(2001)029 2.0.CO;2 Article history Received: 10 Oct 2000 Revision Received: 21 Feb 2001 Accepted: 03 Mar 2001 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Alfredo Aguillón-Robles, Thierry Calmus, Mathieu Benoit, Hervé Bellon, René C. Maury, Joseph Cotten, Jacques Bourgois, François Michaud; Late Miocene adakites and Nb-enriched basalts from Vizcaino Peninsula, Mexico: Indicators of East Pacific Rise subduction below southern Baja California?. Geology 2001;; 29 (6): 531–534. doi: https://doi.org/10.1130/0091-7613(2001)029 2.0.CO;2 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 A typical slab melt association was emplaced from 11 to 8 Ma in the Santa Clara volcanic field, Vizcaino Peninsula, Baja California Sur. It includes adakitic domes and associated pyroclastic flow deposits, together with lava flows of niobium-enriched basalts. The trace element and isotopic (Sr-Nd-Pb) signatures of adakites are consistent with melting of altered mid-ocean ridge basalts, and the sources of the Nb-enriched basalts contain an enriched mantle wedge component. Such associations commonly form at depths of 70–80 km during low-dip subduction of very young oceanic crust. However, the Santa Clara field is relatively close (100 km) to the paleotrench, which suggests that the genesis of its adakites and Nb- enriched basalts occurred in a very high thermal regime linked to the subduction of the then-active Guadalupe spreading center of the East Pacific Rise. Our data suggest that the asthenospheric window documented below northern Baja California also developed beneath the south of the peninsula during the Neogene. This hypothesis is consistent with the spatial distribution and the ages of adakites and magnesian andesites from this region. 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