dc.creator | Martínez, Jorge Oscar | |
dc.creator | Campodonico, Verena Agustina | |
dc.creator | Formica, Stella Maris | |
dc.creator | Depetris Gallino, Pedro Jose | |
dc.date.accessioned | 2018-04-24T19:31:18Z | |
dc.date.accessioned | 2018-11-06T14:43:26Z | |
dc.date.available | 2018-04-24T19:31:18Z | |
dc.date.available | 2018-11-06T14:43:26Z | |
dc.date.created | 2018-04-24T19:31:18Z | |
dc.date.issued | 2016-01 | |
dc.identifier | Martínez, Jorge Oscar; Campodonico, Verena Agustina; Formica, Stella Maris; Depetris Gallino, Pedro Jose; Weathering assessment in the Achala Batholith of the Sierra de Comechingones, Córdoba, Central Argentina. II: Major hydrochemical characteristics and carbon dynamics; Springer Verlag Berlín; Environmental Earth Sciences; 75; 554; 1-2016; 1-19 | |
dc.identifier | 1866-6280 | |
dc.identifier | http://hdl.handle.net/11336/43318 | |
dc.identifier | 1866-6299 | |
dc.identifier | CONICET Digital | |
dc.identifier | CONICET | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1889480 | |
dc.description.abstract | La Trucha is a granitic, second-order catchment (~1.9 km2, average slope 5%) placed at ~1400 m elevation in the Sierra de Comechingones (Argentina, 31°54´S, 64°45´W; 31°53´, 64°44´W). The main geochemical characteristics were studied during a hydrological year (March 2005-February 2006), attending mainly seasonal and spatial variability and weathering-induced carbon consumption. Subjected to a weathering-limited denudation regime, the catchment is representative of hundreds of second-order streams that dissect the Achala Batholith. Water chemistry is typical of streams draining F- rich granites. High discharges (austral summer) determine the dilution of Na+, Ca2+, Mg2+, HCO3-, SO42- and F-. Conversely, high summer rainfall increases Cl- concentrations. The rainfall-induced mobilization of K+ is likely masked by its affinity for adsorption onto fine-grained particles and that of SiO2, by its biological consumption. La Trucha´s upper catchment shows that steep slopes and a shallow regolith layer result in a more diluted water flow, chemically closer to rainfall. Subsurface flow increases the downriver positive rate of La Trucha´s electrical conductivity twice as much in winter (6.7 µS cm-1 per 1000 m) than during wet summer (3.9 µS cm-1 per 1000 m). PHREEQC allowed the calculation of free CO2 and the likelihood of its evasion in different seasons and areas of the catchment. A mean carbon efflux of ~180 mg C m-2 yr-1 has been estimated for La Trucha catchment. First- and second-order streams, which occupy ~62.5 km2 of the Achala Batholith´s surface area, are significant sources in the Sierra de Comechingones´carbon cycle. | |
dc.language | eng | |
dc.publisher | Springer Verlag Berlín | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s12665-016-5264-7 | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs12665-016-5264-7 | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/restrictedAccess | |
dc.subject | MOUNTAINOUS CATCHMENT | |
dc.subject | CARBON DRAWDOWN | |
dc.subject | SECOND-ORDER STREAM | |
dc.subject | STREAM GEOCHEMISTRY | |
dc.title | Weathering assessment in the Achala Batholith of the Sierra de Comechingones, Córdoba, Central Argentina. II: Major hydrochemical characteristics and carbon dynamics | |
dc.type | Artículos de revistas | |
dc.type | Artículos de revistas | |
dc.type | Artículos de revistas | |