Thermochronological constraints on the Cambrian to recent geological evolution of the Argentina passive continental margin

Passive continental margins are geo-archives that store information from the interplay of endogenous and exogenous forces related to continental rifting, post-breakup history, and climate changes. The recent South Atlantic passive continental margins (SAPCMs) in Brazil, Namibia, and South Africa are...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autor principal: Rossello, Eduardo Antonio
Publicado: 2017
Materias:
Argentina
Exhumation history
Passive Continental Margin
Sierras Australes
Sierras Septentrionales
Thermochronology
Apatite
Climate change
Fission reactions
Geology
Metamorphic rocks
Phosphate minerals
Silicate minerals
Temperature
Zircon
Passive continental margin
Tectonics
apatite
Cambrian
continental margin
exhumation
fission track dating
passive margin
rifting
thermochronology
zircon
Buenos Aires [Argentina]
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00401951_v716_n_p182_Kollenz
http://hdl.handle.net/20.500.12110/paper_00401951_v716_n_p182_Kollenz
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00401951_v716_n_p182_Kollenz
record_format dspace
spelling paper:paper_00401951_v716_n_p182_Kollenz2023-06-08T15:04:03Z Thermochronological constraints on the Cambrian to recent geological evolution of the Argentina passive continental margin Rossello, Eduardo Antonio Argentina Exhumation history Passive Continental Margin Sierras Australes Sierras Septentrionales Thermochronology Apatite Climate change Fission reactions Geology Metamorphic rocks Phosphate minerals Silicate minerals Temperature Zircon Argentina Passive continental margin Sierras Australes Sierras Septentrionales Thermochronology Tectonics apatite Cambrian continental margin exhumation fission track dating passive margin rifting thermochronology zircon Argentina Buenos Aires [Argentina] Sierras Australes Sierras Septentrionales Passive continental margins are geo-archives that store information from the interplay of endogenous and exogenous forces related to continental rifting, post-breakup history, and climate changes. The recent South Atlantic passive continental margins (SAPCMs) in Brazil, Namibia, and South Africa are partly high-elevated margins (~ 2000 m a.s.l.), and the recent N-S-trending SAPCM in Argentina and Uruguay is of low elevation. In Argentina, an exception in elevation is arising from the higher topography (> 1000 m a.s.l.) of the two NW-SE-trending mountain ranges Sierras Septentrionales and Sierras Australes. Precambrian metamorphic and intrusive rocks, and siliciclastic rocks of Ordovician to Permian age represent the geological evolution of both areas. The Sierras Australes have been deformed and metamorphosed (incipient - greenschist) during the Gondwanides Orogeny. The low-temperature thermochronological (LTT) data (< 240 °C) indicated that the Upper Jurassic to Lower Cretaceous opening of the South Atlantic has not completely thermally reset the surface rocks. The LTT archives apatite and zircon still revealed information on the pre- to post-orogenic history of the Gondwanides and the Mesozoic and Cenozoic South Atlantic geological evolution. Upper Carboniferous zircon (U-Th/He)-ages (ZHe) indicate the earliest cooling below 180 °C/1 Ma. Most of the ZHe-ages are of Upper Triassic to Jurassic age. The apatite fission-track ages (AFT) of Sierras Septentrionales and the eastern part of Sierras Australes indicate the South Atlantic rifting and, thereafter. AFT-ages of Middle to Upper Triassic on the western side of the Sierras Australes are in contrast, indicating a Triassic exhumation caused by the eastward thrusting along the Sauce Grande wrench. The corresponding t-T models report a complex subsidence and exhumation history with variable rates since the Ordovician. Based on the LTT-data and the numerical modelling we assume that the NW-SE-trending mountain ranges received their geographic NW-SE orientation during the syn- to post-orogenic history of the Gondwanides. © 2016 Elsevier B.V. Fil:Rossello, E.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00401951_v716_n_p182_Kollenz http://hdl.handle.net/20.500.12110/paper_00401951_v716_n_p182_Kollenz
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentina
Exhumation history
Passive Continental Margin
Sierras Australes
Sierras Septentrionales
Thermochronology
Apatite
Climate change
Fission reactions
Geology
Metamorphic rocks
Phosphate minerals
Silicate minerals
Temperature
Zircon
Argentina
Passive continental margin
Sierras Australes
Sierras Septentrionales
Thermochronology
Tectonics
apatite
Cambrian
continental margin
exhumation
fission track dating
passive margin
rifting
thermochronology
zircon
Argentina
Buenos Aires [Argentina]
Sierras Australes
Sierras Septentrionales
spellingShingle Argentina
Exhumation history
Passive Continental Margin
Sierras Australes
Sierras Septentrionales
Thermochronology
Apatite
Climate change
Fission reactions
Geology
Metamorphic rocks
Phosphate minerals
Silicate minerals
Temperature
Zircon
Argentina
Passive continental margin
Sierras Australes
Sierras Septentrionales
Thermochronology
Tectonics
apatite
Cambrian
continental margin
exhumation
fission track dating
passive margin
rifting
thermochronology
zircon
Argentina
Buenos Aires [Argentina]
Sierras Australes
Sierras Septentrionales
Rossello, Eduardo Antonio
Thermochronological constraints on the Cambrian to recent geological evolution of the Argentina passive continental margin
topic_facet Argentina
Exhumation history
Passive Continental Margin
Sierras Australes
Sierras Septentrionales
Thermochronology
Apatite
Climate change
Fission reactions
Geology
Metamorphic rocks
Phosphate minerals
Silicate minerals
Temperature
Zircon
Argentina
Passive continental margin
Sierras Australes
Sierras Septentrionales
Thermochronology
Tectonics
apatite
Cambrian
continental margin
exhumation
fission track dating
passive margin
rifting
thermochronology
zircon
Argentina
Buenos Aires [Argentina]
Sierras Australes
Sierras Septentrionales
description Passive continental margins are geo-archives that store information from the interplay of endogenous and exogenous forces related to continental rifting, post-breakup history, and climate changes. The recent South Atlantic passive continental margins (SAPCMs) in Brazil, Namibia, and South Africa are partly high-elevated margins (~ 2000 m a.s.l.), and the recent N-S-trending SAPCM in Argentina and Uruguay is of low elevation. In Argentina, an exception in elevation is arising from the higher topography (> 1000 m a.s.l.) of the two NW-SE-trending mountain ranges Sierras Septentrionales and Sierras Australes. Precambrian metamorphic and intrusive rocks, and siliciclastic rocks of Ordovician to Permian age represent the geological evolution of both areas. The Sierras Australes have been deformed and metamorphosed (incipient - greenschist) during the Gondwanides Orogeny. The low-temperature thermochronological (LTT) data (< 240 °C) indicated that the Upper Jurassic to Lower Cretaceous opening of the South Atlantic has not completely thermally reset the surface rocks. The LTT archives apatite and zircon still revealed information on the pre- to post-orogenic history of the Gondwanides and the Mesozoic and Cenozoic South Atlantic geological evolution. Upper Carboniferous zircon (U-Th/He)-ages (ZHe) indicate the earliest cooling below 180 °C/1 Ma. Most of the ZHe-ages are of Upper Triassic to Jurassic age. The apatite fission-track ages (AFT) of Sierras Septentrionales and the eastern part of Sierras Australes indicate the South Atlantic rifting and, thereafter. AFT-ages of Middle to Upper Triassic on the western side of the Sierras Australes are in contrast, indicating a Triassic exhumation caused by the eastward thrusting along the Sauce Grande wrench. The corresponding t-T models report a complex subsidence and exhumation history with variable rates since the Ordovician. Based on the LTT-data and the numerical modelling we assume that the NW-SE-trending mountain ranges received their geographic NW-SE orientation during the syn- to post-orogenic history of the Gondwanides. © 2016 Elsevier B.V.
author Rossello, Eduardo Antonio
author_facet Rossello, Eduardo Antonio
author_sort Rossello, Eduardo Antonio
title Thermochronological constraints on the Cambrian to recent geological evolution of the Argentina passive continental margin
title_short Thermochronological constraints on the Cambrian to recent geological evolution of the Argentina passive continental margin
title_full Thermochronological constraints on the Cambrian to recent geological evolution of the Argentina passive continental margin
title_fullStr Thermochronological constraints on the Cambrian to recent geological evolution of the Argentina passive continental margin
title_full_unstemmed Thermochronological constraints on the Cambrian to recent geological evolution of the Argentina passive continental margin
title_sort thermochronological constraints on the cambrian to recent geological evolution of the argentina passive continental margin
publishDate 2017
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00401951_v716_n_p182_Kollenz
http://hdl.handle.net/20.500.12110/paper_00401951_v716_n_p182_Kollenz
work_keys_str_mv AT rosselloeduardoantonio thermochronologicalconstraintsonthecambriantorecentgeologicalevolutionoftheargentinapassivecontinentalmargin
_version_ 1768543269220777984

Ejemplares similares