Cenozoic intraplate tectonics in Central Patagonia: Record of main Andean phases in a weak upper plate
Contraction in intraplate areas is still poorly understood relative to similar deformation at plate margins. In order to contribute to its comprehension, we study the Patagonian broken foreland (PBF) in South America whose evolution remains controversial. Time constraints of tectonic events and stru...
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Elsevier B.V.
2017
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| LEADER | 30737caa a22021737a 4500 | ||
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| 001 | PAPER-17444 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518204840.0 | ||
| 008 | 190410s2017 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-85033588472 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Gianni, G.M. | |
| 245 | 1 | 0 | |a Cenozoic intraplate tectonics in Central Patagonia: Record of main Andean phases in a weak upper plate |
| 260 | |b Elsevier B.V. |c 2017 | ||
| 270 | 1 | 0 | |m Gianni, G.M.; IGSV, Instituto Geofísico Sismológico Ing. F. Volponi, Universidad Nacional de San Juan, CONICET, Km 12, jardín de los Poetas, Argentina; email: guidogianni22@gmail.com |
| 506 | |2 openaire |e Política editorial | ||
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| 520 | 3 | |a Contraction in intraplate areas is still poorly understood relative to similar deformation at plate margins. In order to contribute to its comprehension, we study the Patagonian broken foreland (PBF) in South America whose evolution remains controversial. Time constraints of tectonic events and structural characterization of this belt are limited. Also, major causes of strain location in this orogen far from the plate margin are enigmatic. To unravel tectonic events, we studied the Cenozoic sedimentary record of the central sector of the Patagonian broken foreland (San Bernardo fold and thrust belt, 44°30′S-46°S) and the Andes (Meseta de Chalia, 46°S) following an approach involving growth-strata detection, U-Pb geochronology and structural modeling. Additionally, we elaborate a high resolution analysis of the effective elastic thickness (Te) to examine the relation between intraplate contraction location and variations in lithospheric strength. The occurrence of Eocene growth-strata (~ 44–40 Ma) suggests that contraction in the Andes and the Patagonian broken foreland was linked to the Incaic phase. Detection of synextensional deposits suggests that the broken foreland collapsed partially during Oligocene to early Miocene. During middle Miocene times, the Quechua contractional phase produced folding of Neogene volcanic rocks and olistostrome deposition at ~ 17 Ma. Finally, the presented Te map shows that intraplate contraction related to Andean phases localized preferentially along weak lithospheric zones (Te < 15 km). Hence, the observed strain distribution in the PBF appears to be controlled by lateral variations in the lithospheric strength. Variations in this parameter could be related to thermo-mechanical weakening produced by intraplate rifting in Paleozoic-Mesozoic times. © 2017 Elsevier B.V. |l eng | |
| 536 | |a Detalles de la financiación: Fondo Nacional de Desarrollo Científico, Tecnológico y de Innovación Tecnológica, 1151146, 1110914 | ||
| 536 | |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas | ||
| 536 | |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas | ||
| 536 | |a Detalles de la financiación: This work was financed by PIP 11220110100506 , UBACYT 20020110100019, PICT-2012-1490, FONDECYT projects 1110914 and 1151146 and the Consejo Nacional de Investigaciones Científicas y Técnicas ( CONICET ). We are grateful to Midland Valley Ltd. for providing the Academic Licenses of the Move software. The authors are thankful to Dr. Ulrich Riller and anonymous reviewers that provided critical and constructive comments on this and a previous version of this manuscript. | ||
| 593 | |a IGSV, Instituto Geofísico Sismológico Ing. F. Volponi, Universidad Nacional de San Juan, CONICET, Km 12, jardín de los Poetas, Rivadavia, San Juan 5400, Argentina | ||
| 593 | |a IDEAN, Instituto de Estudios Andinos Don Pablo Groeber, UBA – CONICET, Departamento de Ciencias Geológicas, FCEN, Universidad de Buenos Aires, Argentina | ||
| 593 | |a Departamento de Ciencias de la Tierra, Universidad de Concepción, Casilla 160-C, Concepción, Chile | ||
| 593 | |a SEGEMAR, Av. Julio Argentino Roca 651, Buenos Aires, C1067ABB, Argentina | ||
| 593 | |a School of the Environment, Washington State University, Pullman, WA 99164, United States | ||
| 690 | 1 | 0 | |a ANDEAN PHASES |
| 690 | 1 | 0 | |a BROKEN FORELAND |
| 690 | 1 | 0 | |a ELASTIC THICKNESS |
| 690 | 1 | 0 | |a GROWTH-STRATA |
| 690 | 1 | 0 | |a INTRAPLATE CONTRACTION |
| 690 | 1 | 0 | |a BINARY ALLOYS |
| 690 | 1 | 0 | |a GEOCHRONOLOGY |
| 690 | 1 | 0 | |a LEAD |
| 690 | 1 | 0 | |a PLATES (STRUCTURAL COMPONENTS) |
| 690 | 1 | 0 | |a VOLCANIC ROCKS |
| 690 | 1 | 0 | |a ANDEAN PHASES |
| 690 | 1 | 0 | |a BROKEN FORELAND |
| 690 | 1 | 0 | |a EFFECTIVE ELASTIC THICKNESS |
| 690 | 1 | 0 | |a ELASTIC THICKNESS |
| 690 | 1 | 0 | |a FOLD-AND-THRUST BELTS |
| 690 | 1 | 0 | |a GROWTH STRATA |
| 690 | 1 | 0 | |a HIGH RESOLUTION ANALYSIS |
| 690 | 1 | 0 | |a STRUCTURAL CHARACTERIZATION |
| 690 | 1 | 0 | |a TECTONICS |
| 690 | 1 | 0 | |a CENOZOIC |
| 690 | 1 | 0 | |a DEFORMATION |
| 690 | 1 | 0 | |a ELASTICITY |
| 690 | 1 | 0 | |a FOLD AND THRUST BELT |
| 690 | 1 | 0 | |a FORELAND BASIN |
| 690 | 1 | 0 | |a GEOCHRONOLOGY |
| 690 | 1 | 0 | |a GEOLOGICAL RECORD |
| 690 | 1 | 0 | |a INTRAPLATE PROCESS |
| 690 | 1 | 0 | |a MIOCENE |
| 690 | 1 | 0 | |a NEOGENE |
| 690 | 1 | 0 | |a OLIGOCENE |
| 690 | 1 | 0 | |a PLATE TECTONICS |
| 690 | 1 | 0 | |a RIFTING |
| 690 | 1 | 0 | |a URANIUM-LEAD DATING |
| 690 | 1 | 0 | |a ANDES |
| 690 | 1 | 0 | |a PATAGONIA |
| 700 | 1 | |a Echaurren, A. | |
| 700 | 1 | |a Folguera, A. | |
| 700 | 1 | |a Likerman, J. | |
| 700 | 1 | |a Encinas, A. | |
| 700 | 1 | |a García, H.P.A. | |
| 700 | 1 | |a Dal Molin, C. | |
| 700 | 1 | |a Valencia, V.A. | |
| 773 | 0 | |d Elsevier B.V., 2017 |g v. 721 |h pp. 151-166 |p Tectonophysics |x 00401951 |w (AR-BaUEN)CENRE-81 |t Tectonophysics | |
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| 856 | 4 | 0 | |u https://doi.org/10.1016/j.tecto.2017.10.005 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_00401951_v721_n_p151_Gianni |y Handle |
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| 961 | |a paper_00401951_v721_n_p151_Gianni |b paper |c PE | ||
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| 963 | |a VARI | ||
| 999 | |c 78397 | ||