Vanadiniferous micaceous concretions in the Patquia Formation (Permian), Sierra de Maz, Province of La Rioja

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These concretions form discrete spherical bodies 2 to 20 cm in sizes, within medium grained massive sandstone (arkosic arenite). Three concentric zones are recognized: a) dark green to black core composed of quartz and feldespar cemented by illite and roscoellite, b) an intermediate pale red zone of...

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Autores principales: Caselli, A.T., Limarino, C.O., Castro, L.N.
Formato: JOUR
Materias:
concretion
diagenesis
Permian
sandstone
vanadium
Argentina
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v52_n2_p223_Caselli
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00044822_v52_n2_p223_Caselli
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spelling todo:paper_00044822_v52_n2_p223_Caselli2023-10-03T13:57:19Z Vanadiniferous micaceous concretions in the Patquia Formation (Permian), Sierra de Maz, Province of La Rioja Caselli, A.T. Limarino, C.O. Castro, L.N. concretion diagenesis Permian sandstone vanadium Argentina These concretions form discrete spherical bodies 2 to 20 cm in sizes, within medium grained massive sandstone (arkosic arenite). Three concentric zones are recognized: a) dark green to black core composed of quartz and feldespar cemented by illite and roscoellite, b) an intermediate pale red zone of hematite-coated quartz, and c) a white, iron-leached outer zone. Edax and ICP analyses reveal high concentrations of vanadium mainly in zones a) and b) (60340 and 2582 ppm respectivily), uranium (237 and 163 ppm), rubidium (252ppm) and copper (178ppm). The concretions are interpreted as formed under eodiagenetic conditions before the development of haematite cement which gave the red colour to the host rock. Fil:Caselli, A.T. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Limarino, C.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Castro, L.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v52_n2_p223_Caselli
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic concretion
diagenesis
Permian
sandstone
vanadium
Argentina
spellingShingle concretion
diagenesis
Permian
sandstone
vanadium
Argentina
Caselli, A.T.
Limarino, C.O.
Castro, L.N.
Vanadiniferous micaceous concretions in the Patquia Formation (Permian), Sierra de Maz, Province of La Rioja
topic_facet concretion
diagenesis
Permian
sandstone
vanadium
Argentina
description These concretions form discrete spherical bodies 2 to 20 cm in sizes, within medium grained massive sandstone (arkosic arenite). Three concentric zones are recognized: a) dark green to black core composed of quartz and feldespar cemented by illite and roscoellite, b) an intermediate pale red zone of hematite-coated quartz, and c) a white, iron-leached outer zone. Edax and ICP analyses reveal high concentrations of vanadium mainly in zones a) and b) (60340 and 2582 ppm respectivily), uranium (237 and 163 ppm), rubidium (252ppm) and copper (178ppm). The concretions are interpreted as formed under eodiagenetic conditions before the development of haematite cement which gave the red colour to the host rock.
format JOUR
author Caselli, A.T.
Limarino, C.O.
Castro, L.N.
author_facet Caselli, A.T.
Limarino, C.O.
Castro, L.N.
author_sort Caselli, A.T.
title Vanadiniferous micaceous concretions in the Patquia Formation (Permian), Sierra de Maz, Province of La Rioja
title_short Vanadiniferous micaceous concretions in the Patquia Formation (Permian), Sierra de Maz, Province of La Rioja
title_full Vanadiniferous micaceous concretions in the Patquia Formation (Permian), Sierra de Maz, Province of La Rioja
title_fullStr Vanadiniferous micaceous concretions in the Patquia Formation (Permian), Sierra de Maz, Province of La Rioja
title_full_unstemmed Vanadiniferous micaceous concretions in the Patquia Formation (Permian), Sierra de Maz, Province of La Rioja
title_sort vanadiniferous micaceous concretions in the patquia formation (permian), sierra de maz, province of la rioja
url http://hdl.handle.net/20.500.12110/paper_00044822_v52_n2_p223_Caselli
work_keys_str_mv AT caselliat vanadiniferousmicaceousconcretionsinthepatquiaformationpermiansierrademazprovinceoflarioja
AT limarinoco vanadiniferousmicaceousconcretionsinthepatquiaformationpermiansierrademazprovinceoflarioja
AT castroln vanadiniferousmicaceousconcretionsinthepatquiaformationpermiansierrademazprovinceoflarioja
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