Mostrar el registro sencillo del ítem
dc.contributor.author
Moncinhatto, Thiago
dc.contributor.author
Haag, Maurício Barcelos
dc.contributor.author
Hartmann, Gelvam
dc.contributor.author
Savian, Jairo
dc.contributor.author
Poletti, Wilbor
dc.contributor.author
Sommer, Carlos Augusto
dc.contributor.author
Caselli, Alberto Tomás
dc.contributor.author
Ferreira Da Trindade, Ricardo Ivan
dc.date.available
2021-02-09T16:12:08Z
dc.date.issued
2020-02
dc.identifier.citation
Moncinhatto, Thiago; Haag, Maurício Barcelos; Hartmann, Gelvam; Savian, Jairo; Poletti, Wilbor; et al.; Mineralogical control on the magnetic anisotropy of lavas and ignimbrites: a case study in the Caviahue-Copahue field (Argentina); Wiley Blackwell Publishing, Inc; Geophysical Journal International; 220; 2; 2-2020; 821-838
dc.identifier.issn
0956-540X
dc.identifier.uri
http://hdl.handle.net/11336/125206
dc.description.abstract
Anisotropy of magnetic susceptibility is a petrofabric tool used to estimate the alignment of minerals at the site-scale, the imbrication between the magnetic foliation and the emplacement surface being an indicator of flow direction. However, despite numerous studies examining the flow direction in pyroclastic deposits and lava flows, the effect of magnetic mineralogy and the domain state of ferromagnetic phases on the magnetic fabric remains poorly understood. This paper describes the magnetic mineralogy and its influence on the magnetic fabric of Plio-Pleistocene lava flows and ignimbrites of the Caviahue-Copahue Volcanic Complex in the Andean Southern Volcanic Zone, Argentina. Rock magnetism, anisotropy of magnetic susceptibility and anhysteretic remanent magnetization and petrographic observations were performed on 30 sites of the volcanic complex. Results revealed the extrusive and pyroclastic rocks present varied magnetic mineralogy, formed in different stages of the magmatic evolution. Magnetic mineralogy variations strongly affect the anisotropy of magnetic susceptibility data in volcanic rocks and associated ignimbrites, providing 'scattered' fabrics when late Tirich titanomagnetite phases dominate the fabric, and 'inverse' or 'intermediate' fabrics when single-domain grains are present. 'Normal' fabrics are typically found when early crystallized puremagnetite is present.Our results highlight the complexity in the interpretation ofmagnetic anisotropy data in volcanic rocks and ignimbrites.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
AARM
dc.subject
AMS
dc.subject
CAVIAHUE-COPAHUE VOLCANIC COMPLEX
dc.subject
MAGNETIC MINERALOGY
dc.subject.classification
Vulcanología
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Mineralogical control on the magnetic anisotropy of lavas and ignimbrites: a case study in the Caviahue-Copahue field (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
2020-11-19T21:34:34Z
dc.journal.volume
220
dc.journal.number
2
dc.journal.pagination
821-838
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Moncinhatto, Thiago. Universidade do Sao Paulo. Instituto de Astronomia, Geofísica e Ciências Atmosféricas; Brasil
dc.description.fil
Fil: Haag, Maurício Barcelos. Universidade Federal do Rio Grande do Sul; Brasil
dc.description.fil
Fil: Hartmann, Gelvam. Universidade Estadual de Campinas; Brasil
dc.description.fil
Fil: Savian, Jairo. Universidade Federal do Rio Grande do Sul; Brasil
dc.description.fil
Fil: Poletti, Wilbor. Universidade Federal dos Vales do Jequitinhonha e Mucuri; Brasil
dc.description.fil
Fil: Sommer, Carlos Augusto. Universidade Federal do Rio Grande do Sul; Brasil
dc.description.fil
Fil: Caselli, Alberto Tomás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina. Universidad Nacional de Rio Negro. Sede Alto Valle. Laboratorio de Estudio y Seguimiento de Volcanes Activos; Argentina
dc.description.fil
Fil: Ferreira Da Trindade, Ricardo Ivan. Universidade do Sao Paulo. Instituto de Astronomia, Geofísica e Ciências Atmosféricas; Brasil
dc.journal.title
Geophysical Journal International
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/gji/ggz483
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/gji/article-abstract/220/2/821/5603748
Archivos asociados