Episodic Jurassic to Lower Cretaceous intraplate compression in Central Patagonia during Gondwana breakup

From Lower Jurassic to Lower Cretaceous, several intraplate compression events affected discrete sectors of Central Patagonia, under a general context of crustal extension associated with Gondwana breakup. This was demonstrated by means of 2D and 3D seismic and borehole data, which show partial inve...

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Autores principales:	Gianni, Guido Martin, Folguera, Andrés
Publicado:	2016
Materias:	Intraplate compression Jurassic to Lower Cretaceous inversion Karoo large igneous province Supercontinent break-up
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02643707_v102_n_p185_Navarrete http://hdl.handle.net/20.500.12110/paper_02643707_v102_n_p185_Navarrete
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_02643707_v102_n_p185_Navarrete
record_format	dspace
spelling	paper:paper_02643707_v102_n_p185_Navarrete2023-06-08T15:22:56Z Episodic Jurassic to Lower Cretaceous intraplate compression in Central Patagonia during Gondwana breakup Gianni, Guido Martin Folguera, Andrés Intraplate compression Jurassic to Lower Cretaceous inversion Karoo large igneous province Supercontinent break-up From Lower Jurassic to Lower Cretaceous, several intraplate compression events affected discrete sectors of Central Patagonia, under a general context of crustal extension associated with Gondwana breakup. This was demonstrated by means of 2D and 3D seismic and borehole data, which show partial inversion of Lower and Middle Jurassic extensional structures of the Chubut and Cañadón Asfalto basins, during the earliest stages of breakup. A comparison with surrounding areas in Patagonia, where similar Jurassic intraplate compression was described, allowed the discrimination of three discrete pulses of subtle compression (C1: ∼188–185 Ma; C2: ∼170–163; C3: ∼157–136? Ma). Interestingly, episodic intraplate compressional events are closely followed by high flux magmatic events linked to the westward expansion of the Karoo-Ferrar thermal anomaly, which impacted on the lithosphere of southwest Gondwana in Lower Jurassic. In addition, we determined the approximate direction of the main compressive strain (σ1) compatible with other Jurassic intraplate belts of South America. These observations led us to propose a linkage between a thermo mechanically weakened continental crust due to LIPs activity, changes in plate motions and ridge-push forces generated by the opening of the Weddell Sea, in order to explain intraplate shortening, interrupted while Karoo LIPs magmatic invigoration took place. © 2016 Elsevier Ltd Fil:Gianni, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Folguera, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02643707_v102_n_p185_Navarrete http://hdl.handle.net/20.500.12110/paper_02643707_v102_n_p185_Navarrete
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Intraplate compression Jurassic to Lower Cretaceous inversion Karoo large igneous province Supercontinent break-up
spellingShingle	Intraplate compression Jurassic to Lower Cretaceous inversion Karoo large igneous province Supercontinent break-up Gianni, Guido Martin Folguera, Andrés Episodic Jurassic to Lower Cretaceous intraplate compression in Central Patagonia during Gondwana breakup
topic_facet	Intraplate compression Jurassic to Lower Cretaceous inversion Karoo large igneous province Supercontinent break-up
description	From Lower Jurassic to Lower Cretaceous, several intraplate compression events affected discrete sectors of Central Patagonia, under a general context of crustal extension associated with Gondwana breakup. This was demonstrated by means of 2D and 3D seismic and borehole data, which show partial inversion of Lower and Middle Jurassic extensional structures of the Chubut and Cañadón Asfalto basins, during the earliest stages of breakup. A comparison with surrounding areas in Patagonia, where similar Jurassic intraplate compression was described, allowed the discrimination of three discrete pulses of subtle compression (C1: ∼188–185 Ma; C2: ∼170–163; C3: ∼157–136? Ma). Interestingly, episodic intraplate compressional events are closely followed by high flux magmatic events linked to the westward expansion of the Karoo-Ferrar thermal anomaly, which impacted on the lithosphere of southwest Gondwana in Lower Jurassic. In addition, we determined the approximate direction of the main compressive strain (σ1) compatible with other Jurassic intraplate belts of South America. These observations led us to propose a linkage between a thermo mechanically weakened continental crust due to LIPs activity, changes in plate motions and ridge-push forces generated by the opening of the Weddell Sea, in order to explain intraplate shortening, interrupted while Karoo LIPs magmatic invigoration took place. © 2016 Elsevier Ltd
author	Gianni, Guido Martin Folguera, Andrés
author_facet	Gianni, Guido Martin Folguera, Andrés
author_sort	Gianni, Guido Martin
title	Episodic Jurassic to Lower Cretaceous intraplate compression in Central Patagonia during Gondwana breakup
title_short	Episodic Jurassic to Lower Cretaceous intraplate compression in Central Patagonia during Gondwana breakup
title_full	Episodic Jurassic to Lower Cretaceous intraplate compression in Central Patagonia during Gondwana breakup
title_fullStr	Episodic Jurassic to Lower Cretaceous intraplate compression in Central Patagonia during Gondwana breakup
title_full_unstemmed	Episodic Jurassic to Lower Cretaceous intraplate compression in Central Patagonia during Gondwana breakup
title_sort	episodic jurassic to lower cretaceous intraplate compression in central patagonia during gondwana breakup
publishDate	2016
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02643707_v102_n_p185_Navarrete http://hdl.handle.net/20.500.12110/paper_02643707_v102_n_p185_Navarrete
work_keys_str_mv	AT gianniguidomartin episodicjurassictolowercretaceousintraplatecompressionincentralpatagoniaduringgondwanabreakup AT folgueraandres episodicjurassictolowercretaceousintraplatecompressionincentralpatagoniaduringgondwanabreakup
_version_	1768542217090105344

Episodic Jurassic to Lower Cretaceous intraplate compression in Central Patagonia during Gondwana breakup

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