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The chemical weathering of rocks and migration of elements in the boreal zone (North-West Russia)

Abstract : The objective of this thesis is to improve our understanding of the weathering processes of mafic silicate rocks and element speciation and migration in the boreal environments (White Sea basin, North-Western Russia). Specific goals are to i) characterize and describe the mechanisms governing the chemical weathering and mineral formation in subarctic zone, ii) assess the role of the rock lithology (granitic environment vs. basaltic) in trace elements (TE) speciation and organo-mineral colloids formation in surface waters of boreal high latitude river basins, and iii) reveal the pH-dependence of TE speciation in order to predict possible changes in elements bioavailability in natural water due to their acidification caused by environmental changes. The main originality of the work is to combine, for the first time on the same natural objects, the geochemical, isotope, physico-chemical and mineralogical techniques to better understand the factors that control biogeochemical cycling of elements in the subarctic region.
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Submitted on : Friday, August 21, 2009 - 11:02:43 AM
Last modification on : Thursday, October 15, 2020 - 4:07:09 AM
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  • HAL Id : tel-00410508, version 1



Ekaterina Vasyukova. The chemical weathering of rocks and migration of elements in the boreal zone (North-West Russia). Earth Sciences. Université Paul Sabatier - Toulouse III, 2009. English. ⟨tel-00410508⟩



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