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dc.contributor.author
Bologna, M. S.
dc.contributor.author
Dragone, G. N.
dc.contributor.author
Muzio, R.
dc.contributor.author
Peel, E.
dc.contributor.author
Núñez Demarco, Pablo Andrés
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dc.contributor.author
Ussami, N.
dc.date.available
2022-12-28T13:38:41Z
dc.date.issued
2018-12
dc.identifier.citation
Bologna, M. S.; Dragone, G. N.; Muzio, R.; Peel, E.; Núñez Demarco, Pablo Andrés; et al.; Electrical Structure of the Lithosphere From Rio de la Plata Craton to Paraná Basin: Amalgamation of Cratonic and Refertilized Lithospheres in SW Gondwanaland; American Geophysical Union; Tectonics; 38; 1; 12-2018; 77-94
dc.identifier.issn
0278-7407
dc.identifier.uri
http://hdl.handle.net/11336/182687
dc.description.abstract
We conducted a magnetotelluric (MT) study from Paleoproterozoic Rio de la Plata Craton, in Uruguay, toward Paleozoic-Mesozoic Paraná Basin, in Brazil. The 850-km-long MT transect comprises 35 evenly spaced broadband electromagnetic soundings sites. In the Paraná Basin, 11 additional long-period measurements were acquired to extend the maximum depth of investigation. All data were inverted using two- and three-dimensional approaches obtaining the electrical resistivity structure from the surface down to 200 km. The Rio de la Plata Craton is >200-km thick and resistive (~2,000 Ωm). Its northern limit is electrically defined by a lithosphere scale lateral transition and lower crust conductive anomalies (1–10 Ωm) interpreted as a Paleoproterozoic suture at the southern edge of Rivera-Taquarembó Block. The latter is characterized by an approximately 100-km thick and moderate resistive (>500 Ωm) upper mantle. The Ibaré shear zone is another suture where an ocean-ocean subduction generated the 120-km thick and resistive (>1,000 Ωm) São Gabriel juvenile arc. Proceeding northward, a 70- to 80-km thick, 150-km wide, and inclined resistive zone is imaged. This zone could be remnant of an oceanic lithosphere or island arcs accreted at the southern border of Paraná Basin. The MT transect terminates within the southern Paraná Basin where a 150- to 200-km-thick less resistive lithosphere (<1,000 Ωm) may indicate refertilization processes during plate subduction and ocean closure in Neoproterozoic-Cambrian time. Our MT data support a tectonic model of NNE–SSW convergence for this segment of SW Gondwanaland.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Geophysical Union
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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
CRATON
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ELECTRIC LITHOSPHERE
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MAGNETOTELLURICS
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PARANÁ
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RIO DE LA PLATA
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SW GONDWANALAND
dc.subject.classification
Geoquímica y Geofísica
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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
Electrical Structure of the Lithosphere From Rio de la Plata Craton to Paraná Basin: Amalgamation of Cratonic and Refertilized Lithospheres in SW Gondwanaland
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-12-22T16:02:59Z
dc.journal.volume
38
dc.journal.number
1
dc.journal.pagination
77-94
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
Washington D.C
dc.description.fil
Fil: Bologna, M. S.. Universidade de Sao Paulo; Brasil
dc.description.fil
Fil: Dragone, G. N.. Universidade de Sao Paulo; Brasil
dc.description.fil
Fil: Muzio, R.. Universidad de la República; Uruguay
dc.description.fil
Fil: Peel, E.. Universidad de la República; Uruguay
dc.description.fil
Fil: Núñez Demarco, Pablo Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de la República; Uruguay
dc.description.fil
Fil: Ussami, N.. Universidade de Sao Paulo; Brasil
dc.journal.title
Tectonics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://doi.wiley.com/10.1029/2018TC005148
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1029/2018TC005148
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