Arenigian tholeiitic basalts in the Famatina Ordovician basin, northwestern Argentina: emplacement conditions and their tectonic significance

This study is focused on the analysis of volcanic deposits that crop out at the middle portion of the Las Planchadas range, northern part of the Famatina System in Argentina. These volcanic rocks are records of an Ordovician effusive basaltic volcanism that took place under subaqueous marine conditi...

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Autores principales:	Cisterna,Clara Eugenia, Koukharsky,Magdalena, Coira,Beatriz, Günter,Christina, Ulbrich,Horstpeter H
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2017
Materias:	Tholeiitic basalts Syn-eruptive Hyaloclastic deposits Ordovician Famatina belt
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062017000200002
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spelling	oai:scielo:S0718-710620170002000022017-07-07Arenigian tholeiitic basalts in the Famatina Ordovician basin, northwestern Argentina: emplacement conditions and their tectonic significanceCisterna,Clara EugeniaKoukharsky,MagdalenaCoira,BeatrizGünter,ChristinaUlbrich,Horstpeter H Tholeiitic basalts Syn-eruptive Hyaloclastic deposits Ordovician Famatina belt This study is focused on the analysis of volcanic deposits that crop out at the middle portion of the Las Planchadas range, northern part of the Famatina System in Argentina. These volcanic rocks are records of an Ordovician effusive basaltic volcanism that took place under subaqueous marine conditions. Along the study area crop out an Arenigian volcanic and volcaniclastic rocks succession with massive and autoclastic lavas, hyaloclastites of basaltic composition and volcaniclastic sandstones and mudstones. Large volumes of the volcanic deposits were strongly affected by fragmentation processes during their subaqueous emplacement and in situ accumulated as basaltic breccias. The same volcanic-volcaniclastic association crops out to the south of the Las Planchadas range, forming a basaltic belt with similar characteristics. The geochemical features of the basalts are compatible with depleted mid-ocean ridge basalt (MORB)-like source for the magma, with contribution of subducted related components such as water rich marine hemipelagic sediments, compatible with a back arc geotectonic setting developed along the northern part of the Famatina System during the Arenigian.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.44 n.2 20172017-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062017000200002en10.5027/andgeoV44n2-a02
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Tholeiitic basalts Syn-eruptive Hyaloclastic deposits Ordovician Famatina belt
spellingShingle	Tholeiitic basalts Syn-eruptive Hyaloclastic deposits Ordovician Famatina belt Cisterna,Clara Eugenia Koukharsky,Magdalena Coira,Beatriz Günter,Christina Ulbrich,Horstpeter H Arenigian tholeiitic basalts in the Famatina Ordovician basin, northwestern Argentina: emplacement conditions and their tectonic significance
description	This study is focused on the analysis of volcanic deposits that crop out at the middle portion of the Las Planchadas range, northern part of the Famatina System in Argentina. These volcanic rocks are records of an Ordovician effusive basaltic volcanism that took place under subaqueous marine conditions. Along the study area crop out an Arenigian volcanic and volcaniclastic rocks succession with massive and autoclastic lavas, hyaloclastites of basaltic composition and volcaniclastic sandstones and mudstones. Large volumes of the volcanic deposits were strongly affected by fragmentation processes during their subaqueous emplacement and in situ accumulated as basaltic breccias. The same volcanic-volcaniclastic association crops out to the south of the Las Planchadas range, forming a basaltic belt with similar characteristics. The geochemical features of the basalts are compatible with depleted mid-ocean ridge basalt (MORB)-like source for the magma, with contribution of subducted related components such as water rich marine hemipelagic sediments, compatible with a back arc geotectonic setting developed along the northern part of the Famatina System during the Arenigian.
author	Cisterna,Clara Eugenia Koukharsky,Magdalena Coira,Beatriz Günter,Christina Ulbrich,Horstpeter H
author_facet	Cisterna,Clara Eugenia Koukharsky,Magdalena Coira,Beatriz Günter,Christina Ulbrich,Horstpeter H
author_sort	Cisterna,Clara Eugenia
title	Arenigian tholeiitic basalts in the Famatina Ordovician basin, northwestern Argentina: emplacement conditions and their tectonic significance
title_short	Arenigian tholeiitic basalts in the Famatina Ordovician basin, northwestern Argentina: emplacement conditions and their tectonic significance
title_full	Arenigian tholeiitic basalts in the Famatina Ordovician basin, northwestern Argentina: emplacement conditions and their tectonic significance
title_fullStr	Arenigian tholeiitic basalts in the Famatina Ordovician basin, northwestern Argentina: emplacement conditions and their tectonic significance
title_full_unstemmed	Arenigian tholeiitic basalts in the Famatina Ordovician basin, northwestern Argentina: emplacement conditions and their tectonic significance
title_sort	arenigian tholeiitic basalts in the famatina ordovician basin, northwestern argentina: emplacement conditions and their tectonic significance
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062017000200002
work_keys_str_mv	AT cisternaclaraeugenia arenigiantholeiiticbasaltsinthefamatinaordovicianbasinnorthwesternargentinaemplacementconditionsandtheirtectonicsignificance AT koukharskymagdalena arenigiantholeiiticbasaltsinthefamatinaordovicianbasinnorthwesternargentinaemplacementconditionsandtheirtectonicsignificance AT coirabeatriz arenigiantholeiiticbasaltsinthefamatinaordovicianbasinnorthwesternargentinaemplacementconditionsandtheirtectonicsignificance AT gunterchristina arenigiantholeiiticbasaltsinthefamatinaordovicianbasinnorthwesternargentinaemplacementconditionsandtheirtectonicsignificance AT ulbrichhorstpeterh arenigiantholeiiticbasaltsinthefamatinaordovicianbasinnorthwesternargentinaemplacementconditionsandtheirtectonicsignificance
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Arenigian tholeiitic basalts in the Famatina Ordovician basin, northwestern Argentina: emplacement conditions and their tectonic significance

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