Stratigraphic revision of Ramírez de Velasco ranges, Santiago del Estero

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In this paper new geologic evidences allow us to complete the stratigraphy of Ramez de Velasco ranges. Granitoids of the igneous basement are included into the Ojo de Agua-Ambargasta complex as the Sumampa Granite which is composed of three facies: facies Para Yacu, Sumampa Viejo and Los Telares. Th...

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Autores principales: Leall, P.R., Miró, R.
Formato: Artículo publishedVersion
Publicado: 2011
Materias:
Pampeanas ranges
Ramírez de velasco
Stratigraphy
andesite
basalt
dike
facies
granitoid
outcrop
Paleozoic
petrology
stratigraphy
Argentina
Santiago del Estero [Argentina]
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v68_n1_p84_Leall
http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v68_n1_p84_Leall_oai
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Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-paper_00044822_v68_n1_p84_Leall_oai
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spelling I28-R145-paper_00044822_v68_n1_p84_Leall_oai2020-10-19 Leall, P.R. Miró, R. 2011 In this paper new geologic evidences allow us to complete the stratigraphy of Ramez de Velasco ranges. Granitoids of the igneous basement are included into the Ojo de Agua-Ambargasta complex as the Sumampa Granite which is composed of three facies: facies Para Yacu, Sumampa Viejo and Los Telares. Thin aplitic dykes were included into the same basement as the last magmatic event of the same geological setting. The geochemical signature of these rocks shows meta to peraluminous compositions, which evidence magmatic arc granitoides. Basic dykes, few meters wide and more than one kilometer long, also intrude these granitoids. They are composed of basalts and andesites with calcoalkaline signatures that were correlated with Balbuena formation due to their petrological features. Finally, few and small outcrops of sandstones appears as the only expression of the Neopaleozoic sedimentation. On the basis of all the data obtained we suggest that the Ramíez de Velasco ranges preserve evidences of several geologic processes that took place since the Paleozoic. Fil:Leall, P.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Miró, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_00044822_v68_n1_p84_Leall info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Rev. Asoc. Geol. Argent. 2011;68(1):84-95 Pampeanas ranges Ramírez de velasco Stratigraphy andesite basalt dike facies granitoid outcrop Paleozoic petrology stratigraphy Argentina Santiago del Estero [Argentina] Stratigraphic revision of Ramírez de Velasco ranges, Santiago del Estero info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v68_n1_p84_Leall_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic Pampeanas ranges
Ramírez de velasco
Stratigraphy
andesite
basalt
dike
facies
granitoid
outcrop
Paleozoic
petrology
stratigraphy
Argentina
Santiago del Estero [Argentina]
spellingShingle Pampeanas ranges
Ramírez de velasco
Stratigraphy
andesite
basalt
dike
facies
granitoid
outcrop
Paleozoic
petrology
stratigraphy
Argentina
Santiago del Estero [Argentina]
Leall, P.R.
Miró, R.
Stratigraphic revision of Ramírez de Velasco ranges, Santiago del Estero
topic_facet Pampeanas ranges
Ramírez de velasco
Stratigraphy
andesite
basalt
dike
facies
granitoid
outcrop
Paleozoic
petrology
stratigraphy
Argentina
Santiago del Estero [Argentina]
description In this paper new geologic evidences allow us to complete the stratigraphy of Ramez de Velasco ranges. Granitoids of the igneous basement are included into the Ojo de Agua-Ambargasta complex as the Sumampa Granite which is composed of three facies: facies Para Yacu, Sumampa Viejo and Los Telares. Thin aplitic dykes were included into the same basement as the last magmatic event of the same geological setting. The geochemical signature of these rocks shows meta to peraluminous compositions, which evidence magmatic arc granitoides. Basic dykes, few meters wide and more than one kilometer long, also intrude these granitoids. They are composed of basalts and andesites with calcoalkaline signatures that were correlated with Balbuena formation due to their petrological features. Finally, few and small outcrops of sandstones appears as the only expression of the Neopaleozoic sedimentation. On the basis of all the data obtained we suggest that the Ramíez de Velasco ranges preserve evidences of several geologic processes that took place since the Paleozoic.
format Artículo
Artículo
publishedVersion
author Leall, P.R.
Miró, R.
author_facet Leall, P.R.
Miró, R.
author_sort Leall, P.R.
title Stratigraphic revision of Ramírez de Velasco ranges, Santiago del Estero
title_short Stratigraphic revision of Ramírez de Velasco ranges, Santiago del Estero
title_full Stratigraphic revision of Ramírez de Velasco ranges, Santiago del Estero
title_fullStr Stratigraphic revision of Ramírez de Velasco ranges, Santiago del Estero
title_full_unstemmed Stratigraphic revision of Ramírez de Velasco ranges, Santiago del Estero
title_sort stratigraphic revision of ramírez de velasco ranges, santiago del estero
publishDate 2011
url http://hdl.handle.net/20.500.12110/paper_00044822_v68_n1_p84_Leall
http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v68_n1_p84_Leall_oai
work_keys_str_mv AT leallpr stratigraphicrevisionoframirezdevelascorangessantiagodelestero
AT miror stratigraphicrevisionoframirezdevelascorangessantiagodelestero
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