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Construction and degradation of a broad volcanic massif: The Vicuña Pampa volcanic complex, southern Central Andes, NW Argentina

2017; Geological Society of America; Volume: 129; Issue: 5-6 Linguagem: Inglês

10.1130/b31631.1

1943-2674

Silvina Guzmán, Manfred R. Strecker, Joan Martı́, I.A. Petrinovic, Taylor Schildgen, Pablo Grosse, Carolina Montero‐López, Marco Neri, Roberto Carniel, Fernando Hongn, Claudia M Muruaga, Masafumi Sudo,

Geology and Paleoclimatology Research

Research Article| May 01, 2017 Construction and degradation of a broad volcanic massif: The Vicuña Pampa volcanic complex, southern Central Andes, NW Argentina Silvina Guzmán; Silvina Guzmán 1Instituto de Bio y Geociencias del Noroeste Argentino (IBIGEO), Universidad Nacional de Salta (UNSa)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 9 de Julio 14, 4405 Rosario de Lerma, Salta, Argentina2Institute of Earth Sciences Jaume Almera, ICTJA-CSIC, Lluis Sole i Sabaris s/n, 08028 Barcelona, Spain Search for other works by this author on: GSW Google Scholar Manfred R. Strecker; Manfred R. Strecker 3Institut für Erd- und Umweltwissenschaften, Universität Potsdam, Karl-Liebknecht-Strasse 24, 14476 Potsdam, Germany Search for other works by this author on: GSW Google Scholar Joan Martí; Joan Martí 2Institute of Earth Sciences Jaume Almera, ICTJA-CSIC, Lluis Sole i Sabaris s/n, 08028 Barcelona, Spain Search for other works by this author on: GSW Google Scholar Ivan A. Petrinovic; Ivan A. Petrinovic 4Centro de Investigaciones en Ciencias de la Tierra (CICTERRA), UNC–CONICET, Avenida Vélez Sarsfield 1611, X5016GCA, Córdoba, Argentina Search for other works by this author on: GSW Google Scholar Taylor F. Schildgen; Taylor F. Schildgen 3Institut für Erd- und Umweltwissenschaften, Universität Potsdam, Karl-Liebknecht-Strasse 24, 14476 Potsdam, Germany5Helmholtz-Zentrum Potsdam, Deutsches GeoForschungsZentrum (GFZ), Telegrafenberg, 14473 Potsdam, Germany Search for other works by this author on: GSW Google Scholar Pablo Grosse; Pablo Grosse 6CONICET and Fundación Miguel Lillo, Miguel Lillo 251, 4000 Tucumán, Argentina Search for other works by this author on: GSW Google Scholar Carolina Montero-López; Carolina Montero-López 1Instituto de Bio y Geociencias del Noroeste Argentino (IBIGEO), Universidad Nacional de Salta (UNSa)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 9 de Julio 14, 4405 Rosario de Lerma, Salta, Argentina Search for other works by this author on: GSW Google Scholar Marco Neri; Marco Neri 7Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo-Sezione di Catania, Piazza Roma, 2–95123 Catania, Italy Search for other works by this author on: GSW Google Scholar Roberto Carniel; Roberto Carniel 8Laboratorio di Misure e Trattamento dei Segnali, Dipartimento Politecnico di Ingegneria e Architettura (DPIA), Università di Udine, Via delle Scienze, 206–33100 Udine, Friuli, Italy9Geognosis Project, ITMO University, Kronverksky Prospect, 49, St. Petersburg, Russian Federation Search for other works by this author on: GSW Google Scholar Fernando D. Hongn; Fernando D. Hongn 1Instituto de Bio y Geociencias del Noroeste Argentino (IBIGEO), Universidad Nacional de Salta (UNSa)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 9 de Julio 14, 4405 Rosario de Lerma, Salta, Argentina Search for other works by this author on: GSW Google Scholar Claudia Muruaga; Claudia Muruaga 10Instituto de Sedimentología, Fundación Miguel Lillo, Miguel Lillo 251, 4000 Tucumán, Argentina Search for other works by this author on: GSW Google Scholar Masafumi Sudo Masafumi Sudo 3Institut für Erd- und Umweltwissenschaften, Universität Potsdam, Karl-Liebknecht-Strasse 24, 14476 Potsdam, Germany Search for other works by this author on: GSW Google Scholar Author and Article Information Silvina Guzmán 1Instituto de Bio y Geociencias del Noroeste Argentino (IBIGEO), Universidad Nacional de Salta (UNSa)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 9 de Julio 14, 4405 Rosario de Lerma, Salta, Argentina2Institute of Earth Sciences Jaume Almera, ICTJA-CSIC, Lluis Sole i Sabaris s/n, 08028 Barcelona, Spain Manfred R. Strecker 3Institut für Erd- und Umweltwissenschaften, Universität Potsdam, Karl-Liebknecht-Strasse 24, 14476 Potsdam, Germany Joan Martí 2Institute of Earth Sciences Jaume Almera, ICTJA-CSIC, Lluis Sole i Sabaris s/n, 08028 Barcelona, Spain Ivan A. Petrinovic 4Centro de Investigaciones en Ciencias de la Tierra (CICTERRA), UNC–CONICET, Avenida Vélez Sarsfield 1611, X5016GCA, Córdoba, Argentina Taylor F. Schildgen 3Institut für Erd- und Umweltwissenschaften, Universität Potsdam, Karl-Liebknecht-Strasse 24, 14476 Potsdam, Germany5Helmholtz-Zentrum Potsdam, Deutsches GeoForschungsZentrum (GFZ), Telegrafenberg, 14473 Potsdam, Germany Pablo Grosse 6CONICET and Fundación Miguel Lillo, Miguel Lillo 251, 4000 Tucumán, Argentina Carolina Montero-López 1Instituto de Bio y Geociencias del Noroeste Argentino (IBIGEO), Universidad Nacional de Salta (UNSa)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 9 de Julio 14, 4405 Rosario de Lerma, Salta, Argentina Marco Neri 7Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo-Sezione di Catania, Piazza Roma, 2–95123 Catania, Italy Roberto Carniel 8Laboratorio di Misure e Trattamento dei Segnali, Dipartimento Politecnico di Ingegneria e Architettura (DPIA), Università di Udine, Via delle Scienze, 206–33100 Udine, Friuli, Italy9Geognosis Project, ITMO University, Kronverksky Prospect, 49, St. Petersburg, Russian Federation Fernando D. Hongn 1Instituto de Bio y Geociencias del Noroeste Argentino (IBIGEO), Universidad Nacional de Salta (UNSa)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 9 de Julio 14, 4405 Rosario de Lerma, Salta, Argentina Claudia Muruaga 10Instituto de Sedimentología, Fundación Miguel Lillo, Miguel Lillo 251, 4000 Tucumán, Argentina Masafumi Sudo 3Institut für Erd- und Umweltwissenschaften, Universität Potsdam, Karl-Liebknecht-Strasse 24, 14476 Potsdam, Germany Publisher: Geological Society of America Received: 04 Aug 2016 Revision Received: 07 Dec 2016 Accepted: 09 Jan 2017 First Online: 06 Jul 2017 Online Issn: 1943-2674 Print Issn: 0016-7606 © 2017 Geological Society of America GSA Bulletin (2017) 129 (5-6): 750–766. https://doi.org/10.1130/B31631.1 Article history Received: 04 Aug 2016 Revision Received: 07 Dec 2016 Accepted: 09 Jan 2017 First Online: 06 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Silvina Guzmán, Manfred R. Strecker, Joan Martí, Ivan A. Petrinovic, Taylor F. Schildgen, Pablo Grosse, Carolina Montero-López, Marco Neri, Roberto Carniel, Fernando D. Hongn, Claudia Muruaga, Masafumi Sudo; Construction and degradation of a broad volcanic massif: The Vicuña Pampa volcanic complex, southern Central Andes, NW Argentina. GSA Bulletin 2017;; 129 (5-6): 750–766. doi: https://doi.org/10.1130/B31631.1 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 SocietyGSA Bulletin Search Advanced Search Abstract The Vicuña Pampa volcanic complex, at the SE edge of the arid Puna Plateau of the Central Andes, records the interplay between volcanic construction and degradational processes. The low-sloping Vicuña Pampa volcanic complex, with a 1200-m-deep, southeastward-opening depression, was previously interpreted as a collapse caldera based on morphological considerations. However, characteristic features associated with collapse calderas do not exist, and close inspection instead suggests that the Vicuña Pampa volcanic complex is a strongly eroded, broad, massif-type composite volcano of mainly basaltic to trachyandesitic composition. Construction of the Vicuña Pampa volcanic complex occurred during two distinct cycles separated by the development of the depression. The first and main cycle took place at ca. 12 Ma and was dominated by lava flows and subordinate scoria cones and domes. The second cycle, possibly late Miocene in age, affected the SW portion of the depression with the emplacement of domes. We interpret the central depression as the result of a possible sector collapse and subsequent intense fluvial erosion during middle to late Miocene time, facilitated by faulting, steepened topography, and wetter climate conditions compared to today. We estimate that ∼65% of the initial edifice of ∼240 km3 was degraded. The efficiency of degradation processes for removing mass from the Vicuña Pampa volcanic complex is surprising, considering that today the region is arid, and the stream channels within the complex are predominantly transport limited, forming a series of coalesced, aggraded alluvial fans and eolian infill. Hence, the Vicuña Pampa volcanic complex records the effects of past degradation efficiency that differs substantially from that of today. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.