Las termas uranium deposit, Catamarca, Argentina

Las Termas uranium deposit, Catamarca, Argentina. Las Termas uranium deposit is part of a F-rich open greisen system, hosted by cataclastic breccias developed in the metamorphosed basement rocks of Sierra de Fiambalá, province of Catamarca, Argentina. It is genetically related to the granular facies...

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Detalles Bibliográficos
Publicado: 2001
Materias:
Argentina
Greisen
Province of catamarca
U deposit
hydrothermal fluid
mineralization
petrography
tectonic setting
uranium
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v56_n1_p91_Rubinstein
http://hdl.handle.net/20.500.12110/paper_00044822_v56_n1_p91_Rubinstein
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00044822_v56_n1_p91_Rubinstein
record_format dspace
spelling paper:paper_00044822_v56_n1_p91_Rubinstein2023-06-08T14:25:30Z Las termas uranium deposit, Catamarca, Argentina Argentina Greisen Province of catamarca U deposit hydrothermal fluid mineralization petrography tectonic setting uranium Argentina Las Termas uranium deposit, Catamarca, Argentina. Las Termas uranium deposit is part of a F-rich open greisen system, hosted by cataclastic breccias developed in the metamorphosed basement rocks of Sierra de Fiambalá, province of Catamarca, Argentina. It is genetically related to the granular facies of Los Ratones Granite, a highly evolved granite from a post-orogenic tectonic setting. Petrographical and mineralogical studies are used to determine the evolution of mineralizing fluids during the hydrothermal alteration processes. Hence, during the late-magmatic - hydrothermal stage, high aK+ fluids lead to potassic alteration. Then, in the post-magmatic stage, an increase of aH+ and aFH led to greisenization that produced U liberation from the granite accessory minerals. It was followed by a second stage of K-metasomatism that produced microclinization. Finally, higher H+ metasomatism, caused by an increase of meteoric water influx into the hydrothermal system, led to post-greisenization processes. The following mineral sequence, indicative of progressive decrease in fO2 during the evolution of the mineralising fluids, has been identified: cassiterite-wolframite, pitchblende-pyrite, chalcopyrite-pyrrhotite- melnikovite-galena-sphalerite-electrum. Chemical analyses of mineralised samples show that U contents range from 0.1 to 9.2 ‰ U3O8 with several samples of economic interest. Significant amounts of Mo and Au, and anomalies of Pb, Zn, Cu and Ag were also detected. 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v56_n1_p91_Rubinstein http://hdl.handle.net/20.500.12110/paper_00044822_v56_n1_p91_Rubinstein
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentina
Greisen
Province of catamarca
U deposit
hydrothermal fluid
mineralization
petrography
tectonic setting
uranium
Argentina
spellingShingle Argentina
Greisen
Province of catamarca
U deposit
hydrothermal fluid
mineralization
petrography
tectonic setting
uranium
Argentina
Las termas uranium deposit, Catamarca, Argentina
topic_facet Argentina
Greisen
Province of catamarca
U deposit
hydrothermal fluid
mineralization
petrography
tectonic setting
uranium
Argentina
description Las Termas uranium deposit, Catamarca, Argentina. Las Termas uranium deposit is part of a F-rich open greisen system, hosted by cataclastic breccias developed in the metamorphosed basement rocks of Sierra de Fiambalá, province of Catamarca, Argentina. It is genetically related to the granular facies of Los Ratones Granite, a highly evolved granite from a post-orogenic tectonic setting. Petrographical and mineralogical studies are used to determine the evolution of mineralizing fluids during the hydrothermal alteration processes. Hence, during the late-magmatic - hydrothermal stage, high aK+ fluids lead to potassic alteration. Then, in the post-magmatic stage, an increase of aH+ and aFH led to greisenization that produced U liberation from the granite accessory minerals. It was followed by a second stage of K-metasomatism that produced microclinization. Finally, higher H+ metasomatism, caused by an increase of meteoric water influx into the hydrothermal system, led to post-greisenization processes. The following mineral sequence, indicative of progressive decrease in fO2 during the evolution of the mineralising fluids, has been identified: cassiterite-wolframite, pitchblende-pyrite, chalcopyrite-pyrrhotite- melnikovite-galena-sphalerite-electrum. Chemical analyses of mineralised samples show that U contents range from 0.1 to 9.2 ‰ U3O8 with several samples of economic interest. Significant amounts of Mo and Au, and anomalies of Pb, Zn, Cu and Ag were also detected.
title Las termas uranium deposit, Catamarca, Argentina
title_short Las termas uranium deposit, Catamarca, Argentina
title_full Las termas uranium deposit, Catamarca, Argentina
title_fullStr Las termas uranium deposit, Catamarca, Argentina
title_full_unstemmed Las termas uranium deposit, Catamarca, Argentina
title_sort las termas uranium deposit, catamarca, argentina
publishDate 2001
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v56_n1_p91_Rubinstein
http://hdl.handle.net/20.500.12110/paper_00044822_v56_n1_p91_Rubinstein
_version_ 1768544618543054848

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