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Abstract:

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.

Registro:

Documento: Artículo
Título:Geochemical processes controlling silica concentrations in groundwaters of the Salado River drainage basin, Argentina
Autor:Miretzky, P.; Conzonno, V.; Fernández Cirelli, A.
Filiación:Departamento de Geología, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellon II, 1428 Buenos Aires, Argentina
Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellon II, 1428 Buenos Aires, Argentina
Palabras clave: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
Año:2001
Volumen:73
Número:3
Página de inicio:155
Página de fin:166
DOI: http://dx.doi.org/10.1016/S0375-6742(01)00194-7
Título revista:Journal of Geochemical Exploration
Título revista abreviado:J. Geochem. Explor.
ISSN:03756742
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03756742_v73_n3_p155_Miretzky

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Citas:

---------- APA ----------
Miretzky, P., Conzonno, V. & Fernández Cirelli, A. (2001) . Geochemical processes controlling silica concentrations in groundwaters of the Salado River drainage basin, Argentina. Journal of Geochemical Exploration, 73(3), 155-166.
http://dx.doi.org/10.1016/S0375-6742(01)00194-7
---------- CHICAGO ----------
Miretzky, P., Conzonno, V., Fernández Cirelli, A. "Geochemical processes controlling silica concentrations in groundwaters of the Salado River drainage basin, Argentina" . Journal of Geochemical Exploration 73, no. 3 (2001) : 155-166.
http://dx.doi.org/10.1016/S0375-6742(01)00194-7
---------- MLA ----------
Miretzky, P., Conzonno, V., Fernández Cirelli, A. "Geochemical processes controlling silica concentrations in groundwaters of the Salado River drainage basin, Argentina" . Journal of Geochemical Exploration, vol. 73, no. 3, 2001, pp. 155-166.
http://dx.doi.org/10.1016/S0375-6742(01)00194-7
---------- VANCOUVER ----------
Miretzky, P., Conzonno, V., Fernández Cirelli, A. Geochemical processes controlling silica concentrations in groundwaters of the Salado River drainage basin, Argentina. J. Geochem. Explor. 2001;73(3):155-166.
http://dx.doi.org/10.1016/S0375-6742(01)00194-7