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dc.contributor.author
Gürer, Derya
dc.contributor.author
Galland, Olivier
dc.contributor.author
Fernando Corfu
dc.contributor.author
Leanza, Hector Armando
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dc.contributor.author
Sassier, Caroline
dc.date.available
2018-06-08T17:51:34Z
dc.date.issued
2015-09
dc.identifier.citation
Gürer, Derya; Galland, Olivier; Fernando Corfu; Leanza, Hector Armando; Sassier, Caroline; Structure and evolution of volcanic plumbing systems in fold-and-thrust belts: A case study of the Cerro Negro de Tricao Malal, Neuquén Province, Argentina; Geological Society of America; Geological Society Of America Bulletin; 128; 1-2; 9-2015; 315-331
dc.identifier.issn
0016-7606
dc.identifier.uri
http://hdl.handle.net/11336/47905
dc.description.abstract
Magma ascent and emplacement in compressional tectonic settings remain poorly understood. Geophysical studies show that volcanic plumbing systems in compressional environments are vertically partitioned into a deep level subject to regional compression and a shallow level subject to local extension. Such vertical partitioning has also been documented for the plumbing systems of mud volcanoes, implying common, yet unresolved, underlying processes. In order to better constrain the mechanisms governing this depth partitioning of emplacement mechanisms, we studied the structure and evolution of the Cerro Negro intrusive complex emplaced in the Chos Malal fold-and-thrust belt in the foothills of the Neuquén Andes, Argentina. The Cerro Negro intrusive complex consists of sills and N-S–striking dikes that crosscut the sills. The most prominent structures in the study area are N-S–trending folds, and both E- and W-vergent thrusts. We provide new U-Pb ages of 11.63 ± 0.20 Ma and 11.58 ± 0.18 Ma for sills and 11.55 ± 0.06 Ma for a dike, which show that the Cerro Negro intrusive complex was emplaced in a short period of time. Our ages and field observations demonstrate that the emplacement of the Cerro Negro intrusive complex was coeval with the tectonic development of the Chos Malal fold-and-thrust belt. This implies that the dikes were emplaced perpendicular to the main shortening direction. The systematic locations of the dikes at the anticlinal hinges suggest that their emplacement was controlled by local, shallow stresses related to outer-arc stretching at the anticlinal hinge. We conclude that folding-related outer-arc stretching is one mechanism responsible for the vertical partitioning of igneous plumbing systems in compressional tectonic settings.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Geological Society of America
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Neuquén - Argentina
dc.subject
Volcaninc
dc.subject
Cerro Negro
dc.subject
Tricao Malal
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Structure and evolution of volcanic plumbing systems in fold-and-thrust belts: A case study of the Cerro Negro de Tricao Malal, Neuquén Province, Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-05-24T14:24:44Z
dc.identifier.eissn
1943-2674
dc.journal.volume
128
dc.journal.number
1-2
dc.journal.pagination
315-331
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
Boulder
dc.description.fil
Fil: Gürer, Derya. University of Oslo; Noruega
dc.description.fil
Fil: Galland, Olivier. University of Oslo; Noruega
dc.description.fil
Fil: Fernando Corfu. University of Oslo; Noruega
dc.description.fil
Fil: Leanza, Hector Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales ; Argentina
dc.description.fil
Fil: Sassier, Caroline. University of Oslo; Noruega
dc.journal.title
Geological Society Of America Bulletin
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1130/B31341.1
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/gsa/gsabulletin/article/128/1-2/315-331/126329
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