Geology of cerro Los Guanacos area, Calamuchita department, Córdoba province

Geologically, the area of cerro Los Guanacos belongs to the Sierras de Córdoba basement and consists of an upper Proterozoic-Eopalaeozoic sequence of serpentinites, amphibolites, gneises, schists, marbles and metaquarzites, with mineralogical assemblages that indicate medium-grade metamorphism (amph...

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Detalles Bibliográficos
Autor principal: González Chiozza, S.
Formato: JOUR
Materias:
Córdoba
Los Guanacos
Metamorphic sole
Sierras Pampeanas
Ultrabasic body
igneous intrusion
lithology
metamorphic rock
ophiolite
structural geology
Argentina
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v57_n1_p55_GonzalezChiozza
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00044822_v57_n1_p55_GonzalezChiozza2023-10-03T13:57:39Z Geology of cerro Los Guanacos area, Calamuchita department, Córdoba province González Chiozza, S. Córdoba Los Guanacos Metamorphic sole Sierras Pampeanas Ultrabasic body igneous intrusion lithology metamorphic rock ophiolite structural geology Argentina Geologically, the area of cerro Los Guanacos belongs to the Sierras de Córdoba basement and consists of an upper Proterozoic-Eopalaeozoic sequence of serpentinites, amphibolites, gneises, schists, marbles and metaquarzites, with mineralogical assemblages that indicate medium-grade metamorphism (amphibolite facies), equivalent to that observed regionally. Petrological, geochemical and structural studies were used to define the protoliths of the sequence. The base of the sequence is marked by the Los Guanacos ultrabasic body, a serpentinized ophiolitic fragment originally composed of mantle-crust transitional peridotites with associated basic sills. These rocks are overlain by metamorphites generated from marine pelitic sediments with intercalations of tabular bodies of limestone, basalt and silicic layers. Similarities in the rare earth element content of the three igneous lithotypes of the sequence (peridotites, basites from sills and basalts), suggest a comagmatic relationship between them. Structurally, the area is dominated by a synformal anticlinal fold, which hosts the Los Guanacos chromite-bearing ultramafic body in its core. Also remarkable is the presence, in the base of the ultramafic body, of an amphibolitic metamorphic sole that is associated with a shear zone, and defines a tectonic contact between the ultrabasites and migmatic gneises. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v57_n1_p55_GonzalezChiozza
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Córdoba
Los Guanacos
Metamorphic sole
Sierras Pampeanas
Ultrabasic body
igneous intrusion
lithology
metamorphic rock
ophiolite
structural geology
Argentina
spellingShingle Córdoba
Los Guanacos
Metamorphic sole
Sierras Pampeanas
Ultrabasic body
igneous intrusion
lithology
metamorphic rock
ophiolite
structural geology
Argentina
González Chiozza, S.
Geology of cerro Los Guanacos area, Calamuchita department, Córdoba province
topic_facet Córdoba
Los Guanacos
Metamorphic sole
Sierras Pampeanas
Ultrabasic body
igneous intrusion
lithology
metamorphic rock
ophiolite
structural geology
Argentina
description Geologically, the area of cerro Los Guanacos belongs to the Sierras de Córdoba basement and consists of an upper Proterozoic-Eopalaeozoic sequence of serpentinites, amphibolites, gneises, schists, marbles and metaquarzites, with mineralogical assemblages that indicate medium-grade metamorphism (amphibolite facies), equivalent to that observed regionally. Petrological, geochemical and structural studies were used to define the protoliths of the sequence. The base of the sequence is marked by the Los Guanacos ultrabasic body, a serpentinized ophiolitic fragment originally composed of mantle-crust transitional peridotites with associated basic sills. These rocks are overlain by metamorphites generated from marine pelitic sediments with intercalations of tabular bodies of limestone, basalt and silicic layers. Similarities in the rare earth element content of the three igneous lithotypes of the sequence (peridotites, basites from sills and basalts), suggest a comagmatic relationship between them. Structurally, the area is dominated by a synformal anticlinal fold, which hosts the Los Guanacos chromite-bearing ultramafic body in its core. Also remarkable is the presence, in the base of the ultramafic body, of an amphibolitic metamorphic sole that is associated with a shear zone, and defines a tectonic contact between the ultrabasites and migmatic gneises.
format JOUR
author González Chiozza, S.
author_facet González Chiozza, S.
author_sort González Chiozza, S.
title Geology of cerro Los Guanacos area, Calamuchita department, Córdoba province
title_short Geology of cerro Los Guanacos area, Calamuchita department, Córdoba province
title_full Geology of cerro Los Guanacos area, Calamuchita department, Córdoba province
title_fullStr Geology of cerro Los Guanacos area, Calamuchita department, Córdoba province
title_full_unstemmed Geology of cerro Los Guanacos area, Calamuchita department, Córdoba province
title_sort geology of cerro los guanacos area, calamuchita department, córdoba province
url http://hdl.handle.net/20.500.12110/paper_00044822_v57_n1_p55_GonzalezChiozza
work_keys_str_mv AT gonzalezchiozzas geologyofcerrolosguanacosareacalamuchitadepartmentcordobaprovince
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