Geochemistry and geochemical modeling of unsaturated zone in a tropical region in Urania, Sao Paulo state, Brazil

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Authors

BERTOLO Reginaldo HIRATA Ricardo ŠRÁČEK Ondřej

Year of publication 2006
Type Article in Periodical
Magazine / Source Journal of Hydrology
MU Faculty or unit

Faculty of Science

Citation
Field Geochemistry
Keywords Unsaturated zone; hydrogeochemical modeling; sediementary rocks; hydrogeochemistry;
Description Unsaturated zone in Urania, Sao Paulo state, Brazil, has been investigated using pore water sampling, tenziometric measurements, and solid phase analyses. Pore water chemistry evolves from calcium-bicarbonate in shallow zone towards sodium-bicarbonate in deep zone. Principal secondary mineral is kaolinite and degree of feldspare weathering decreases with depth. Inverse geochemical modeling gave non-unique results and several reaction pathways are possible.
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