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.
Related projects:	Geological Processes and their Environmental Impact - Contact of the Variscides and Alpides