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http://hdl.handle.net/2122/10597
DC Field | Value | Language |
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dc.date.accessioned | 2017-09-11T08:15:01Z | en |
dc.date.available | 2017-09-11T08:15:01Z | en |
dc.date.issued | 2017-05 | en |
dc.identifier.uri | http://hdl.handle.net/2122/10597 | en |
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 Mio-cene 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. | en |
dc.language.iso | English | en |
dc.relation.ispartof | GSA Bulletin | en |
dc.relation.ispartofseries | /129(2017) | en |
dc.subject | volcanoes | en |
dc.title | Construction and degradation of a broad volcanic massif: The Vicuña pampa volcanic complex, southern central Andes, NW Argentina | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 750-766 | en |
dc.subject.INGV | Vicuña Pampa volcanic complex, southern Central Andes, NW Argentina | en |
dc.identifier.doi | 10.1130/B31631.1 | en |
dc.description.obiettivoSpecifico | 1V. Storia eruttiva | en |
dc.description.obiettivoSpecifico | 2V. Struttura e sistema di alimentazione dei vulcani | en |
dc.description.journalType | JCR Journal | en |
dc.contributor.author | Guzmán, S. | en |
dc.contributor.author | Strecker, M. R. | en |
dc.contributor.author | Martí, J. | en |
dc.contributor.author | Petrinovic, I. A. | en |
dc.contributor.author | Schildgen, T. F. | en |
dc.contributor.author | Grosse, P. | en |
dc.contributor.author | Montero-López, C. | en |
dc.contributor.author | Neri, Marco | en |
dc.contributor.author | Carniel, R. | en |
dc.contributor.author | Hongn, F. D. | en |
dc.contributor.author | Muruaga, C. | en |
dc.contributor.author | Sudo, M. | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Instituto de Bio y Geociencias del NOA (IBIGEO), UNSa, CONICET, Salta, Argentina | - |
crisitem.author.dept | Institute of Earth Sciences Jaume Almera, ICTJA-CSIC, Barcelona, Spain | - |
crisitem.author.dept | Universitat Potsdam, Potsdam, Germany | - |
crisitem.author.dept | Instituto de Bio y Geociencias del NOA (IBIGEO), UNSa, CONICET, Salta, Argentina | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | - |
crisitem.author.dept | Università di Udine - Italy | - |
crisitem.author.orcid | 0000-0003-3632-2960 | - |
crisitem.author.orcid | 0000-0002-6721-6653 | - |
crisitem.author.orcid | 0000-0002-5890-3398 | - |
crisitem.author.orcid | 0000-0001-8391-2512 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
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File | Description | Size | Format | Existing users please Login |
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2017 Guzman et al Construction and degradation of a broad volcanic massif GSA 2017.pdf | 13.85 MB | Adobe PDF |
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