Artículo
Weathering assessment in the Achala Batholith of the Sierra de Comechingones, Córdoba, Central Argentina. III: Appraising chemical weathering
Martínez, Jorge Omar; Campodonico, Verena Agustina
; Formica, Stella Maris; Depetris Gallino, Pedro Jose
Fecha de publicación:
03/2018
Editorial:
Springer Verlag
Revista:
Environmental Earth Sciences
ISSN:
1866-6299
e-ISSN:
1866-6280
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
La Trucha is a small (~ 1.9 km2), mountainous (~ 1300 m a.s.l.) granitic drainage basin, demonstrative of hundreds of second-order basins in the Achala Batholith of the Sierras Pampeanas of Córdoba, Argentina. Dominated by physical weathering and a weathering-limited denudation regime, the coarse- and fine-grained regolith has shown scant geochemical differences with the country rock. Erosion and sediment transport mainly occurs during torrential rain events (austral summer), whereas surface waters classify as dilute (750 < TΣ+ < 375 µeq L−1) or very dilute (375 < TΣ+ < 185 µeq L−1) water types. The dynamics of chemical weathering at La Trucha was approached through the use of major dissolved chemical components, comparing the performance of different methodologies in its assessment: mineral stability diagrams (i.e., chemical equilibria), the RE chemical weathering index, ternary diagrams, and PHREEQC inverse modeling. The latter approach allowed to probe into subtleties of the geochemical processes indicating that, besides the morphological dependency on mineral hydrolysis/dissolution or precipitation, there is a marked seasonal control that promotes or limits the occurrence of geochemical reactions.
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CICTERRA)
Articulos de CENTRO DE INVEST.EN CS.DE LA TIERRA
Articulos de CENTRO DE INVEST.EN CS.DE LA TIERRA
Citación
Martínez, Jorge Omar; Campodonico, Verena Agustina; Formica, Stella Maris; Depetris Gallino, Pedro Jose; Weathering assessment in the Achala Batholith of the Sierra de Comechingones, Córdoba, Central Argentina. III: Appraising chemical weathering; Springer Verlag; Environmental Earth Sciences; 77; 6; 3-2018; 242
Compartir
Altmétricas