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GEOCHEMISTRY OF THE ACTIVE LAYER AND PERMAFROST IN NORTHWESTERN CANADA: FROM MEASUREMENTS TO QUATERNARY STRATIGRAPHY
Session: John Ross MacKay Symposium - Permafrost III / Symposium John Ross MacKay - Pergélisol III
Denis Lacelle, Department of Geography, University of Ottawa (Canada)
Marielle Fontaine, Department of Geography, University of Ottawa (Canada)
Steve Kokelj, Northwest Territories Geological Survey, Government of the Northwest Territories (Canada)
The amount and distribution of soluble ions and salts in active layer and permafrost provide a tool to assess present and past changes in active layer thickness, and chemical weathering regimes in a given landscape. This short paper summarizes various methodologies used for the extraction of soluble salts and ions in the active layer and permafrost, and then tests two methods from two sites in northwestern Canada. The results are discussed with respect to the extraction techniques and the timing of permafrost aggradation following sediment deposition (i.e., syngenetic vs epigenetic permafrost).
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