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1 2010

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Evaluation of the accuracy of determination of the chemical denudation based on numerical geochemical modeling

Szostakiewicz-Hołownia M., Małecki J.J., Matyjasik M.

Biuletyn Państwowego Instytutu Geologicznego

2010

nr 441 Hydrogeologia z. 10

175--181

Denudation refers to processes that are destructive and reshaping the surface of the Earth. Some of these processes causing removal of the rocks from the land masses are known as the chemical denudation. The results presented in this article focus on quantitative analysis of the chemical denudation using a new approach based on numerical models and evaluation of the computed rates. This evaluation has been conducted in two stages: qualitative and quantitative. Qualitative analysis evaluated processes occurring in aquifers based on the weathering studied in thin sections made of the native aquifer rock material and buried in these aquifers. Quantitative analysis was based on determination of dissolved amount of the rock in the dissolved discs that were placed both in the aquifers and on the ground surface. Observed denudation in the field rock discs is consistent with the results of the numerical modeling, which in the authors’ view suggests validity of the used approach.