Mortatti, Jefferson and Probst, Jean-Luc and Fernandes, Alexandre Martins and Mortatti, B.C. and Oliveira, Helder Influence of discharge on silicate weathering dynamics of the Tietê river basin : major cations and dissolved silica approach. (2008) Geochimica Brasiliensis, 22 (1). 15-26. ISSN 0102-9800
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(Document in English)
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Official URL: http://sbgq.org.br/publicacoes/periodicos/geochimica-brasiliensis
Abstract
The Tietê river water was investigated in terms of the seasonality of major cations and dissolved silica mainly due to the influences of discharges in the watershed, in order to recognize the main rock weathering type occurring in the basin. With the proposed geochemical model it was possible to identify, after atmospheric and anthropogenic input corrections, the main chemical species released from the silicate weathering in the basin and their relationship with the river discharge. With the Re index calculated for the basin (3.09) it was possible to identify the main weathering process occurring in the basin and the transition of the stability field of monosiallitization to bisiallitization, with no significant seasonal variations in the river water discharge.
Item Type: | Article |
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Additional Information: | Thanks to Sociedade Brasileira de Geoquimica editor. The definitive version is available at http://www.sbgq.org.br/ The original PDF of the article can be found at Geochimica Brasiliensis website : http://www.sbgq.org.br/publicacoes/revistas.php |
HAL Id: | hal-03477423 |
Audience (journal): | National peer-reviewed journal |
Uncontrolled Keywords: | |
Institution: | Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE) Other partners > Universidade de São Paulo - USP (BRAZIL) Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE) French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE) Other partners > Universidade Estadual de Campinas - Unicamp (BRAZIL) |
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Deposited On: | 13 Apr 2010 10:16 |
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