Paleomagnetism and geochemistry from the Upper Cretaceous Tres Picos Prieto locality (43°S), Patagonian Plateau Basalts

A paleomagnetic study on nine samples from lavas from the Upper Cretaceous Tres Picos Prieto locality (43°50'S and 70°3'W), Patagonian Plateau Basaltic Province, revealed that a ca. 300 m thick pile of basalts accumulated during three discrete (i.e., temporally separated) volcanic episodes...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Zaffarana,Claudia Beatriz, Lagorio,Silvia Leonor, Somoza,Rubén
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2012
Materias:	Patagonian Plateau Basaltic Province Late Cretaceous Paleomagnetism Geochemistry Argentina
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062012000100003
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-71062012000100003
record_format	dspace
spelling	oai:scielo:S0718-710620120001000032012-03-29Paleomagnetism and geochemistry from the Upper Cretaceous Tres Picos Prieto locality (43°S), Patagonian Plateau BasaltsZaffarana,Claudia BeatrizLagorio,Silvia LeonorSomoza,Rubén Patagonian Plateau Basaltic Province Late Cretaceous Paleomagnetism Geochemistry Argentina A paleomagnetic study on nine samples from lavas from the Upper Cretaceous Tres Picos Prieto locality (43°50'S and 70°3'W), Patagonian Plateau Basaltic Province, revealed that a ca. 300 m thick pile of basalts accumulated during three discrete (i.e., temporally separated) volcanic episodes. The chemistry of these lavas shows characteristics compatible with both subduction and intraplate magmatism, with the former having a more important contribution in the younger lavas. Overall, we interpret these rocks to be transitional basalts generated in a supra-subduction environment. The Late Cretaceous to Cenozoic Patagonian Plateau Basaltic Province crops out from eastern Patagonia to the cordillera, and their genesis have been associated with different tectonic processes, even for spatially separated rocks of the same age. Considering that the development of the magmatic province is contemporary with the stage of westward drift of South America, we propose that magma generation and upwelling due to rapidly shearing asthenosphere inducing circulatory flow associated to asperities in the lithosphere-asthenosphere interface (shear-driven upwelling) can be evaluated as a further potential mechanism to account for many outcrops of these backarc to intraplate lavas.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.39 n.1 20122012-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062012000100003en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Patagonian Plateau Basaltic Province Late Cretaceous Paleomagnetism Geochemistry Argentina
spellingShingle	Patagonian Plateau Basaltic Province Late Cretaceous Paleomagnetism Geochemistry Argentina Zaffarana,Claudia Beatriz Lagorio,Silvia Leonor Somoza,Rubén Paleomagnetism and geochemistry from the Upper Cretaceous Tres Picos Prieto locality (43°S), Patagonian Plateau Basalts
description	A paleomagnetic study on nine samples from lavas from the Upper Cretaceous Tres Picos Prieto locality (43°50'S and 70°3'W), Patagonian Plateau Basaltic Province, revealed that a ca. 300 m thick pile of basalts accumulated during three discrete (i.e., temporally separated) volcanic episodes. The chemistry of these lavas shows characteristics compatible with both subduction and intraplate magmatism, with the former having a more important contribution in the younger lavas. Overall, we interpret these rocks to be transitional basalts generated in a supra-subduction environment. The Late Cretaceous to Cenozoic Patagonian Plateau Basaltic Province crops out from eastern Patagonia to the cordillera, and their genesis have been associated with different tectonic processes, even for spatially separated rocks of the same age. Considering that the development of the magmatic province is contemporary with the stage of westward drift of South America, we propose that magma generation and upwelling due to rapidly shearing asthenosphere inducing circulatory flow associated to asperities in the lithosphere-asthenosphere interface (shear-driven upwelling) can be evaluated as a further potential mechanism to account for many outcrops of these backarc to intraplate lavas.
author	Zaffarana,Claudia Beatriz Lagorio,Silvia Leonor Somoza,Rubén
author_facet	Zaffarana,Claudia Beatriz Lagorio,Silvia Leonor Somoza,Rubén
author_sort	Zaffarana,Claudia Beatriz
title	Paleomagnetism and geochemistry from the Upper Cretaceous Tres Picos Prieto locality (43°S), Patagonian Plateau Basalts
title_short	Paleomagnetism and geochemistry from the Upper Cretaceous Tres Picos Prieto locality (43°S), Patagonian Plateau Basalts
title_full	Paleomagnetism and geochemistry from the Upper Cretaceous Tres Picos Prieto locality (43°S), Patagonian Plateau Basalts
title_fullStr	Paleomagnetism and geochemistry from the Upper Cretaceous Tres Picos Prieto locality (43°S), Patagonian Plateau Basalts
title_full_unstemmed	Paleomagnetism and geochemistry from the Upper Cretaceous Tres Picos Prieto locality (43°S), Patagonian Plateau Basalts
title_sort	paleomagnetism and geochemistry from the upper cretaceous tres picos prieto locality (43°s), patagonian plateau basalts
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062012000100003
work_keys_str_mv	AT zaffaranaclaudiabeatriz paleomagnetismandgeochemistryfromtheuppercretaceoustrespicosprietolocality43spatagonianplateaubasalts AT lagoriosilvialeonor paleomagnetismandgeochemistryfromtheuppercretaceoustrespicosprietolocality43spatagonianplateaubasalts AT somozaruben paleomagnetismandgeochemistryfromtheuppercretaceoustrespicosprietolocality43spatagonianplateaubasalts
_version_	1714205833772924928

Paleomagnetism and geochemistry from the Upper Cretaceous Tres Picos Prieto locality (43°S), Patagonian Plateau Basalts

Ejemplares similares