Constraints on the Neogene growth of the central Patagonian Andes at the latitude of the Chile triple junction (45–47°S) using U/Pb geochronology in synorogenic strata
Desertification of Central Patagonia began between ~14–12 Ma and therefore was not directly connected to the opening of the Drake Passage and initial conformation of the Antarctica ice cap in early Miocene times. Local processes, in particular the uplift of the Southern Andes, seem to have played a...
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ftconicet:oai:ri.conicet.gov.ar:11336/88399 2023-10-09T21:47:14+02:00 Constraints on the Neogene growth of the central Patagonian Andes at the latitude of the Chile triple junction (45–47°S) using U/Pb geochronology in synorogenic strata Folguera Telichevsky, Andres Encinas, Alfonso Echaurren Gonzalez, Andres Gianni, Guido Martin Orts, Darío Leandro Valencia, Víctor Carrasco, Gabriel application/pdf http://hdl.handle.net/11336/88399 eng eng Elsevier Science info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0040195118302361 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tecto.2018.06.011 http://hdl.handle.net/11336/88399 Folguera Telichevsky, Andres; Encinas, Alfonso; Echaurren Gonzalez, Andres; Gianni, Guido Martin; Orts, Darío Leandro; et al.; Constraints on the Neogene growth of the central Patagonian Andes at the latitude of the Chile triple junction (45–47°S) using U/Pb geochronology in synorogenic strata; Elsevier Science; Tectonophysics; 744; 10-2018; 134-154 0040-1951 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ NEOGENE UPLIFT PATAGONIAN ANDES SYNOROGENIC STRATA U-PB GEOCHRONOLOGY https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.tecto.2018.06.011 2023-09-24T20:15:26Z Desertification of Central Patagonia began between ~14–12 Ma and therefore was not directly connected to the opening of the Drake Passage and initial conformation of the Antarctica ice cap in early Miocene times. Local processes, in particular the uplift of the Southern Andes, seem to have played a major role in climatic and biotic changes. We studied synorogenic strata filling a partly cannibalized foredeep between ~45° and 47°S at the latitudes of the Chile triple juction. Older synorogenic successions have yielded 18.7–16.4 Ma (U-Pb) in the western sector of the North Patagonian Cordillera corresponding to Meseta Guadal, Jeinemeni and Alto de Río Cisnes sections. This uplift was partly contemporaneous with broken foreland deformation associated with the San Bernardo fold belt to the east at 17.7–15 Ma. Younger synorogenic successions of 13.5 Ma (U-Pb), associated with a short pulse of major uplift that gave way to deposition of a thick conglomeratic succession, and subsequently finer-grained deposits of 12.3 Ma, are on the eastern Andean front in the Chalía and Guenguell sections, implying a retraction in orogenic activity, and out-of-sequence growth of the Patagonian Cordillera. Consequently, contractional deformation in this area ended after ~12 Ma, sealed by the extrusion of extensive alkali flood basalts, indicating that Neogene shortening only lasted ~6 My, ending around 6 My before the subduction of the Chile Ridge at the latitudes of Central Patagonia and 4.5 My before subduction at the southern tip of South America. Fil: Folguera Telichevsky, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina Fil: Encinas, Alfonso. Universidad de Concepción; Chile Fil: Echaurren Gonzalez, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. ... Article in Journal/Newspaper Antarc* Antarctica Drake Passage Ice cap CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Patagonia Drake Passage Argentina Gonzalez ENVELOPE(-58.250,-58.250,-63.917,-63.917) Pablo ENVELOPE(-63.717,-63.717,-64.283,-64.283) San Bernardo ENVELOPE(-58.817,-58.817,-62.183,-62.183) Tectonophysics 744 134 154 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
NEOGENE UPLIFT PATAGONIAN ANDES SYNOROGENIC STRATA U-PB GEOCHRONOLOGY https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
NEOGENE UPLIFT PATAGONIAN ANDES SYNOROGENIC STRATA U-PB GEOCHRONOLOGY https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Folguera Telichevsky, Andres Encinas, Alfonso Echaurren Gonzalez, Andres Gianni, Guido Martin Orts, Darío Leandro Valencia, Víctor Carrasco, Gabriel Constraints on the Neogene growth of the central Patagonian Andes at the latitude of the Chile triple junction (45–47°S) using U/Pb geochronology in synorogenic strata |
topic_facet |
NEOGENE UPLIFT PATAGONIAN ANDES SYNOROGENIC STRATA U-PB GEOCHRONOLOGY https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
Desertification of Central Patagonia began between ~14–12 Ma and therefore was not directly connected to the opening of the Drake Passage and initial conformation of the Antarctica ice cap in early Miocene times. Local processes, in particular the uplift of the Southern Andes, seem to have played a major role in climatic and biotic changes. We studied synorogenic strata filling a partly cannibalized foredeep between ~45° and 47°S at the latitudes of the Chile triple juction. Older synorogenic successions have yielded 18.7–16.4 Ma (U-Pb) in the western sector of the North Patagonian Cordillera corresponding to Meseta Guadal, Jeinemeni and Alto de Río Cisnes sections. This uplift was partly contemporaneous with broken foreland deformation associated with the San Bernardo fold belt to the east at 17.7–15 Ma. Younger synorogenic successions of 13.5 Ma (U-Pb), associated with a short pulse of major uplift that gave way to deposition of a thick conglomeratic succession, and subsequently finer-grained deposits of 12.3 Ma, are on the eastern Andean front in the Chalía and Guenguell sections, implying a retraction in orogenic activity, and out-of-sequence growth of the Patagonian Cordillera. Consequently, contractional deformation in this area ended after ~12 Ma, sealed by the extrusion of extensive alkali flood basalts, indicating that Neogene shortening only lasted ~6 My, ending around 6 My before the subduction of the Chile Ridge at the latitudes of Central Patagonia and 4.5 My before subduction at the southern tip of South America. Fil: Folguera Telichevsky, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina Fil: Encinas, Alfonso. Universidad de Concepción; Chile Fil: Echaurren Gonzalez, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. ... |
format |
Article in Journal/Newspaper |
author |
Folguera Telichevsky, Andres Encinas, Alfonso Echaurren Gonzalez, Andres Gianni, Guido Martin Orts, Darío Leandro Valencia, Víctor Carrasco, Gabriel |
author_facet |
Folguera Telichevsky, Andres Encinas, Alfonso Echaurren Gonzalez, Andres Gianni, Guido Martin Orts, Darío Leandro Valencia, Víctor Carrasco, Gabriel |
author_sort |
Folguera Telichevsky, Andres |
title |
Constraints on the Neogene growth of the central Patagonian Andes at the latitude of the Chile triple junction (45–47°S) using U/Pb geochronology in synorogenic strata |
title_short |
Constraints on the Neogene growth of the central Patagonian Andes at the latitude of the Chile triple junction (45–47°S) using U/Pb geochronology in synorogenic strata |
title_full |
Constraints on the Neogene growth of the central Patagonian Andes at the latitude of the Chile triple junction (45–47°S) using U/Pb geochronology in synorogenic strata |
title_fullStr |
Constraints on the Neogene growth of the central Patagonian Andes at the latitude of the Chile triple junction (45–47°S) using U/Pb geochronology in synorogenic strata |
title_full_unstemmed |
Constraints on the Neogene growth of the central Patagonian Andes at the latitude of the Chile triple junction (45–47°S) using U/Pb geochronology in synorogenic strata |
title_sort |
constraints on the neogene growth of the central patagonian andes at the latitude of the chile triple junction (45–47°s) using u/pb geochronology in synorogenic strata |
publisher |
Elsevier Science |
url |
http://hdl.handle.net/11336/88399 |
long_lat |
ENVELOPE(-58.250,-58.250,-63.917,-63.917) ENVELOPE(-63.717,-63.717,-64.283,-64.283) ENVELOPE(-58.817,-58.817,-62.183,-62.183) |
geographic |
Patagonia Drake Passage Argentina Gonzalez Pablo San Bernardo |
geographic_facet |
Patagonia Drake Passage Argentina Gonzalez Pablo San Bernardo |
genre |
Antarc* Antarctica Drake Passage Ice cap |
genre_facet |
Antarc* Antarctica Drake Passage Ice cap |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0040195118302361 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tecto.2018.06.011 http://hdl.handle.net/11336/88399 Folguera Telichevsky, Andres; Encinas, Alfonso; Echaurren Gonzalez, Andres; Gianni, Guido Martin; Orts, Darío Leandro; et al.; Constraints on the Neogene growth of the central Patagonian Andes at the latitude of the Chile triple junction (45–47°S) using U/Pb geochronology in synorogenic strata; Elsevier Science; Tectonophysics; 744; 10-2018; 134-154 0040-1951 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.tecto.2018.06.011 |
container_title |
Tectonophysics |
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744 |
container_start_page |
134 |
op_container_end_page |
154 |
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1779310186090987520 |