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dc.contributor.author
Guzman, Silvina Raquel
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Strecker, Manfred R.
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Martí, Joan
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Petrinovic, Ivan Alejandro
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Schildgen, Taylor F.
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Grosse, Pablo
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Montero Lopez, Maria Carolina
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Neri, Marco
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Carniel, Roberto
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Hongn, Fernando Daniel
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Muruaga, Claudia Marcela
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Sudo, Masafumi
dc.date.available
2018-07-02T21:11:45Z
dc.date.issued
2017-05-01
dc.identifier.citation
Guzman, Silvina Raquel; Strecker, Manfred R.; Martí, Joan; Petrinovic, Ivan Alejandro; Schildgen, Taylor F.; et al.; Construction and degradation of a broad volcanic massif: The Vicuña pampa volcanic complex, southern central Andes, NW Argentina; Geological Society of America; Geological Society Of America Bulletin; 129; 5-6; 1-5-2017; 750-766
dc.identifier.issn
0016-7606
dc.identifier.uri
http://hdl.handle.net/11336/50975
dc.description.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-mdeep, 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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Geological Society of America
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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Vicuña Pampa Volcanic Complex
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Puna Plateau
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Central Andes
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Volcanic Massif
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Paleoclimate
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Geociencias multidisciplinaria
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Construction and degradation of a broad volcanic massif: The Vicuña pampa volcanic complex, southern central Andes, NW Argentina
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info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-06-19T15:52:01Z
dc.journal.volume
129
dc.journal.number
5-6
dc.journal.pagination
750-766
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Guzman, Silvina Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; Argentina
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Fil: Strecker, Manfred R.. Universitat Potsdam; Alemania
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Fil: Martí, Joan. Consejo Superior de Investigaciones Científicas. Instituto de Ciencias de la Tierra Jaume Almera; España
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Fil: Petrinovic, Ivan Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
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Fil: Schildgen, Taylor F.. Universitat Potsdam; Alemania
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Fil: Grosse, Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fundación Miguel Lillo; Argentina
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Fil: Montero Lopez, Maria Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; Argentina
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Fil: Neri, Marco. Istituto Nazionale Di Geofisica E Vulcanologia; Italia
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Fil: Carniel, Roberto. Università Di Udine; Italia. ITMO University; Rusia
dc.description.fil
Fil: Hongn, Fernando Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; Argentina
dc.description.fil
Fil: Muruaga, Claudia Marcela. Fundación Miguel Lillo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
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Fil: Sudo, Masafumi. Universitat Potsdam; Alemania
dc.journal.title
Geological Society Of America Bulletin
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1130/B31631.1
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/gsa/gsabulletin/article/129/5-6/750/207853/Construction-and-degradation-of-a-broad-volcanic


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