Electrical Structure of the Lithosphere From Rio de la Plata Craton to Paraná Basin: Amalgamation of Cratonic and Refertilized Lithospheres in SW Gondwanaland
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 meas...
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Blackwell Publishing Ltd
2019
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| LEADER | 29900caa a22017417a 4500 | ||
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| 001 | PAPER-25836 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518205758.0 | ||
| 008 | 190410s2019 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-85059540399 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Bologna, M.S. | |
| 245 | 1 | 0 | |a Electrical Structure of the Lithosphere From Rio de la Plata Craton to Paraná Basin: Amalgamation of Cratonic and Refertilized Lithospheres in SW Gondwanaland |
| 260 | |b Blackwell Publishing Ltd |c 2019 | ||
| 270 | 1 | 0 | |m Bologna, M.S.; Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Departamento de Geofísica, Universidade de São PauloBrazil; email: mbologna@usp.br |
| 506 | |2 openaire |e Política editorial | ||
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| 504 | |a Yoshino, T., Laumonier, M., McIsaac, E., Katsura, T., Electrical conductivity of basaltic and carbonatite melt-bearing peridotite at high-pressures: Implications for melt distribution and melt fraction in the upper mantle (2010) Earth and Planetary Science Letters, 295 (3-4), pp. 593-602. , https://doi.org/10.1016/j.epsl.2010.04.050 | ||
| 520 | 3 | |a 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. ©2018. American Geophysical Union. All Rights Reserved. |l eng | |
| 536 | |a Detalles de la financiación: Conselho Nacional de Desenvolvimento Científico e Tecnológico, 306284/2011, 31445/ 2013-0, 309506/2015-8 | ||
| 536 | |a Detalles de la financiación: 2012/06082-6, 2009/50493-8 | ||
| 536 | |a Detalles de la financiación: Universidade de São Paulo, 2009/54006-4 | ||
| 536 | |a Detalles de la financiación: This project was financially supported by FAPESP Thematic Projects 2012/06082-6 and 2009/50493-8, CNPq research grants to M. S. Bologna (31445/ 2013-0 and 306284/2011), N. Ussami (309506/2015-8) and CNPq PhD scholarship to G. Dragone. We dedicate this work to the memory of Icaro Vitorello (INPE) who for the last three decades gave his energy and leadership to make possible the EM studies in Brazil. Our thanks to the field and instrumentation laboratory crew from INPE-MCTI, the Petrobras sponsored geophysical equipment pool of Observatório Nacional-MCTI for providing additional broadband and long-period MT systems and to Universidad de la República transport assistance during field work. Magnetotelluric transfer function estimates are available through the Zenodo data repository (https://doi.org/10.5281/ zenodo.1248225). Data modeling made use of the computing facilities of the Laboratory of Astroinformatics (IAG/ USP, NAT/Unicsul) with financial sup port of FAPESP (grant 2009/54006-4) and the CNPq/INCT-A, and of HPC resource provided by the Superintendency of Information Technology of the Universidade de São Paulo. We thank Leila Marques and Carlos A. M. Chaves for comments on an early version of the manuscript and three anonymous reviewers for careful and thorough revision and suggestions. | ||
| 593 | |a Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Departamento de Geofísica, Universidade de São Paulo, São Paulo, Brazil | ||
| 593 | |a Instituto de Ciencias Geológicas, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay | ||
| 593 | |a Departamento de Ciencias Geológicas, Facultad de Ciencias Exatas y Naturales, IGeBA Universidad de Buenos Aires, CONICET, Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a CRATON |
| 690 | 1 | 0 | |a ELECTRIC LITHOSPHERE |
| 690 | 1 | 0 | |a MAGNETOTELLURICS |
| 690 | 1 | 0 | |a PARANA |
| 690 | 1 | 0 | |a RIO DE LA PLATA |
| 690 | 1 | 0 | |a SW GONDWANALAND |
| 690 | 1 | 0 | |a MAGNETOTELLURICS |
| 690 | 1 | 0 | |a METALS |
| 690 | 1 | 0 | |a CRATON |
| 690 | 1 | 0 | |a DEPTH OF INVESTIGATION |
| 690 | 1 | 0 | |a ELECTRIC LITHOSPHERE |
| 690 | 1 | 0 | |a ELECTRICAL RESISTIVITY STRUCTURES |
| 690 | 1 | 0 | |a ELECTRICAL STRUCTURES |
| 690 | 1 | 0 | |a ELECTROMAGNETIC SOUNDINGS |
| 690 | 1 | 0 | |a RIO DE LA PLATA |
| 690 | 1 | 0 | |a SW GONDWANALAND |
| 690 | 1 | 0 | |a STRUCTURAL GEOLOGY |
| 690 | 1 | 0 | |a CRATON |
| 690 | 1 | 0 | |a ELECTROMAGNETIC FIELD |
| 690 | 1 | 0 | |a GONDWANA |
| 690 | 1 | 0 | |a MAGNETOTELLURIC METHOD |
| 690 | 1 | 0 | |a OCEANIC LITHOSPHERE |
| 690 | 1 | 0 | |a SUBDUCTION ZONE |
| 690 | 1 | 0 | |a THREE-DIMENSIONAL MODELING |
| 690 | 1 | 0 | |a PARANA BASIN |
| 690 | 1 | 0 | |a RIO DE LA PLATA CRATON |
| 700 | 1 | |a Dragone, G.N. | |
| 700 | 1 | |a Muzio, R. | |
| 700 | 1 | |a Peel, E. | |
| 700 | 1 | |a Nuñez-Demarco, P. | |
| 700 | 1 | |a Ussami, N. | |
| 773 | 0 | |d Blackwell Publishing Ltd, 2019 |g v. 38 |h pp. 77-94 |k n. 1 |p Tectonics |x 02787407 |w (AR-BaUEN)CENRE-25 |t Tectonics | |
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| 856 | 4 | 0 | |u https://doi.org/10.1029/2018TC005148 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_02787407_v38_n1_p77_Bologna |y Handle |
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