Geochemical processes controlling silica concentrations in groundwaters of the Salado River drainage basin, Argentina

Chemical analyses of dissolved silica in the shallow groundwater of the lower part of the Salado River drainage basin indicate that silica values averaged 60 ppm. The groundwaters are oversaturated in relation to quartz, Na-plagioclase, K-feldspar, and the weathering of quartz and aluminosilicates a...

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Autores principales:	Miretzky, P., Conzonno, V., Fernández Cirelli, A.
Formato:	JOUR
Materias:	Groundwater dissolved silica concentration Salado River drainage basin Silica solubility Weathering of silicate minerals Catchments Groundwater Sediments Silica Weathering Volcanic glass shards Analytical geochemistry drainage basin groundwater provenance silica water chemistry
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_03756742_v73_n3_p155_Miretzky
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_03756742_v73_n3_p155_Miretzky
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spelling	todo:paper_03756742_v73_n3_p155_Miretzky2023-10-03T15:30:34Z Geochemical processes controlling silica concentrations in groundwaters of the Salado River drainage basin, Argentina Miretzky, P. Conzonno, V. Fernández Cirelli, A. Groundwater dissolved silica concentration Salado River drainage basin Silica solubility Weathering of silicate minerals Catchments Groundwater Sediments Silica Weathering Volcanic glass shards Analytical geochemistry drainage basin groundwater provenance silica water chemistry Chemical analyses of dissolved silica in the shallow groundwater of the lower part of the Salado River drainage basin indicate that silica values averaged 60 ppm. The groundwaters are oversaturated in relation to quartz, Na-plagioclase, K-feldspar, and the weathering of quartz and aluminosilicates appear to have little control on silica concentrations in solution. Groundwater is undersaturated with respect to amorphous silica present in the loessic sediments, and these sediments are specially important in the control of the groundwater composition. The sources of amorphous silica are volcanic glass shards and biogenic silica derived from plant (silicophytoliths, diatom frustules) or animal remains (sponge spicules) also present in the Pampean loess. Silicophytoliths and diatoms have also been reported in A soil horizon samples. The dissolution of amorphous silica most likely controls the high dissolved silica concentrations in groundwater. © 2001 Elsevier Science Ltd All rights reserved. Fil:Miretzky, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Conzonno, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Fernández Cirelli, A. 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_03756742_v73_n3_p155_Miretzky
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Groundwater dissolved silica concentration Salado River drainage basin Silica solubility Weathering of silicate minerals Catchments Groundwater Sediments Silica Weathering Volcanic glass shards Analytical geochemistry drainage basin groundwater provenance silica water chemistry
spellingShingle	Groundwater dissolved silica concentration Salado River drainage basin Silica solubility Weathering of silicate minerals Catchments Groundwater Sediments Silica Weathering Volcanic glass shards Analytical geochemistry drainage basin groundwater provenance silica water chemistry Miretzky, P. Conzonno, V. Fernández Cirelli, A. Geochemical processes controlling silica concentrations in groundwaters of the Salado River drainage basin, Argentina
topic_facet	Groundwater dissolved silica concentration Salado River drainage basin Silica solubility Weathering of silicate minerals Catchments Groundwater Sediments Silica Weathering Volcanic glass shards Analytical geochemistry drainage basin groundwater provenance silica water chemistry
description	Chemical analyses of dissolved silica in the shallow groundwater of the lower part of the Salado River drainage basin indicate that silica values averaged 60 ppm. The groundwaters are oversaturated in relation to quartz, Na-plagioclase, K-feldspar, and the weathering of quartz and aluminosilicates appear to have little control on silica concentrations in solution. Groundwater is undersaturated with respect to amorphous silica present in the loessic sediments, and these sediments are specially important in the control of the groundwater composition. The sources of amorphous silica are volcanic glass shards and biogenic silica derived from plant (silicophytoliths, diatom frustules) or animal remains (sponge spicules) also present in the Pampean loess. Silicophytoliths and diatoms have also been reported in A soil horizon samples. The dissolution of amorphous silica most likely controls the high dissolved silica concentrations in groundwater. © 2001 Elsevier Science Ltd All rights reserved.
format	JOUR
author	Miretzky, P. Conzonno, V. Fernández Cirelli, A.
author_facet	Miretzky, P. Conzonno, V. Fernández Cirelli, A.
author_sort	Miretzky, P.
title	Geochemical processes controlling silica concentrations in groundwaters of the Salado River drainage basin, Argentina
title_short	Geochemical processes controlling silica concentrations in groundwaters of the Salado River drainage basin, Argentina
title_full	Geochemical processes controlling silica concentrations in groundwaters of the Salado River drainage basin, Argentina
title_fullStr	Geochemical processes controlling silica concentrations in groundwaters of the Salado River drainage basin, Argentina
title_full_unstemmed	Geochemical processes controlling silica concentrations in groundwaters of the Salado River drainage basin, Argentina
title_sort	geochemical processes controlling silica concentrations in groundwaters of the salado river drainage basin, argentina
url	http://hdl.handle.net/20.500.12110/paper_03756742_v73_n3_p155_Miretzky
work_keys_str_mv	AT miretzkyp geochemicalprocessescontrollingsilicaconcentrationsingroundwatersofthesaladoriverdrainagebasinargentina AT conzonnov geochemicalprocessescontrollingsilicaconcentrationsingroundwatersofthesaladoriverdrainagebasinargentina AT fernandezcirellia geochemicalprocessescontrollingsilicaconcentrationsingroundwatersofthesaladoriverdrainagebasinargentina
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Geochemical processes controlling silica concentrations in groundwaters of the Salado River drainage basin, Argentina

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