The Gondwana connections of northern Patagonia

A multidisciplinary study (U-Pb sensitive high-resolution ion microprobe geochronology, Hf and O isotopes in zircon, Sr and Nd isotopes in whole-rocks, as well as major and trace element geochemistry) has been carried out on granitoid samples from the area west of Valcheta, North Patagonian Massif,...

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Publicado:	2014
Materias:	Geochronology Granite Isotopes Lead Neodymium Silicate minerals Uranium Hf and O isotopes Major and trace elements Northern patagonia Orogenic belts Sensitive high-resolution ion microprobe Sierras pampeanas Sr and Nd isotopes Structural information Strontium fold belt geochronology Gondwana granitoid granodiorite hafnium ion microprobe neodymium isotope oxygen isotope petrology strontium isotope trace element uranium-lead dating zircon Antarctica Argentina Buenos Aires [Argentina] Patagonia Sierra de la Ventana Sierras Pampeanas Transantarctic Mountains
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167649_v171_n3_p313_Pankhurst http://hdl.handle.net/20.500.12110/paper_00167649_v171_n3_p313_Pankhurst
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00167649_v171_n3_p313_Pankhurst
record_format	dspace
spelling	paper:paper_00167649_v171_n3_p313_Pankhurst2023-06-08T14:38:53Z The Gondwana connections of northern Patagonia Geochronology Granite Isotopes Lead Neodymium Silicate minerals Uranium Hf and O isotopes Major and trace elements Northern patagonia Orogenic belts Sensitive high-resolution ion microprobe Sierras pampeanas Sr and Nd isotopes Structural information Strontium fold belt geochronology Gondwana granitoid granodiorite hafnium ion microprobe neodymium isotope oxygen isotope petrology strontium isotope trace element uranium-lead dating zircon Antarctica Argentina Buenos Aires [Argentina] Patagonia Sierra de la Ventana Sierras Pampeanas Transantarctic Mountains A multidisciplinary study (U-Pb sensitive high-resolution ion microprobe geochronology, Hf and O isotopes in zircon, Sr and Nd isotopes in whole-rocks, as well as major and trace element geochemistry) has been carried out on granitoid samples from the area west of Valcheta, North Patagonian Massif, Argentina. These confirm the Cambrian age of the Tardugno Granodiorite (528 ± 4 Ma) and the Late Permian age of granites in the central part of the Yaminué complex (250 Ma). Together with petrological and structural information for the area, we consider a previously suggested idea that the Cambrian and Ordovician granites of northeastern Patagonia represent continuation of the Pampean and Famatinian orogenic belts of the Sierras Pampeanas, respectively. Our interpretation does not support the hypothesis that Patagonia was accreted in Late Palaeozoic times as a far-travelled terrane, originating in the Central Transantarctic Mountains, and the arguments for and against this idea are reviewed. A parautochthonous origin is preferred with no major ocean closure between the North Patagonian Massif and the Sierra de la Ventana fold belt. © 2014 The Geological Society of London. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167649_v171_n3_p313_Pankhurst http://hdl.handle.net/20.500.12110/paper_00167649_v171_n3_p313_Pankhurst
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Geochronology Granite Isotopes Lead Neodymium Silicate minerals Uranium Hf and O isotopes Major and trace elements Northern patagonia Orogenic belts Sensitive high-resolution ion microprobe Sierras pampeanas Sr and Nd isotopes Structural information Strontium fold belt geochronology Gondwana granitoid granodiorite hafnium ion microprobe neodymium isotope oxygen isotope petrology strontium isotope trace element uranium-lead dating zircon Antarctica Argentina Buenos Aires [Argentina] Patagonia Sierra de la Ventana Sierras Pampeanas Transantarctic Mountains
spellingShingle	Geochronology Granite Isotopes Lead Neodymium Silicate minerals Uranium Hf and O isotopes Major and trace elements Northern patagonia Orogenic belts Sensitive high-resolution ion microprobe Sierras pampeanas Sr and Nd isotopes Structural information Strontium fold belt geochronology Gondwana granitoid granodiorite hafnium ion microprobe neodymium isotope oxygen isotope petrology strontium isotope trace element uranium-lead dating zircon Antarctica Argentina Buenos Aires [Argentina] Patagonia Sierra de la Ventana Sierras Pampeanas Transantarctic Mountains The Gondwana connections of northern Patagonia
topic_facet	Geochronology Granite Isotopes Lead Neodymium Silicate minerals Uranium Hf and O isotopes Major and trace elements Northern patagonia Orogenic belts Sensitive high-resolution ion microprobe Sierras pampeanas Sr and Nd isotopes Structural information Strontium fold belt geochronology Gondwana granitoid granodiorite hafnium ion microprobe neodymium isotope oxygen isotope petrology strontium isotope trace element uranium-lead dating zircon Antarctica Argentina Buenos Aires [Argentina] Patagonia Sierra de la Ventana Sierras Pampeanas Transantarctic Mountains
description	A multidisciplinary study (U-Pb sensitive high-resolution ion microprobe geochronology, Hf and O isotopes in zircon, Sr and Nd isotopes in whole-rocks, as well as major and trace element geochemistry) has been carried out on granitoid samples from the area west of Valcheta, North Patagonian Massif, Argentina. These confirm the Cambrian age of the Tardugno Granodiorite (528 ± 4 Ma) and the Late Permian age of granites in the central part of the Yaminué complex (250 Ma). Together with petrological and structural information for the area, we consider a previously suggested idea that the Cambrian and Ordovician granites of northeastern Patagonia represent continuation of the Pampean and Famatinian orogenic belts of the Sierras Pampeanas, respectively. Our interpretation does not support the hypothesis that Patagonia was accreted in Late Palaeozoic times as a far-travelled terrane, originating in the Central Transantarctic Mountains, and the arguments for and against this idea are reviewed. A parautochthonous origin is preferred with no major ocean closure between the North Patagonian Massif and the Sierra de la Ventana fold belt. © 2014 The Geological Society of London.
title	The Gondwana connections of northern Patagonia
title_short	The Gondwana connections of northern Patagonia
title_full	The Gondwana connections of northern Patagonia
title_fullStr	The Gondwana connections of northern Patagonia
title_full_unstemmed	The Gondwana connections of northern Patagonia
title_sort	gondwana connections of northern patagonia
publishDate	2014
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167649_v171_n3_p313_Pankhurst http://hdl.handle.net/20.500.12110/paper_00167649_v171_n3_p313_Pankhurst
_version_	1768546004435468288

The Gondwana connections of northern Patagonia

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