CGRG Bibliography of Canadian Geomorphology
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Author : Eimers, M.C; Dillon, P.J.; Schiff, S.L.; Paterson, A.M.; and Cumming, B.F.
Date : 2000.
Title : Stable sulphur isotope ratios in sediment of Plastic Lake
Publication : 8th International Paleolimnology Symposium, August 20 to August 24, 2000. Queen's University, Kingston, Ontario
Issue :
Page(s) :
Abstract
Stable sulphur (S) isotope ratios (d34S) and S concentrations were determined in the sediments of a lake which acidified in the past half century, then began to recover over the past decade. In the Boreal ecozone, where mineral sources of S are negligible, the majority of S supplied to catchments originates in atmospheric deposition of industrial origin. Changes in d34S in sediment may reflect changes in the isotope ratio of sulphur supplied to the lake and catchment, as well as biological processes involved in S-cycling. Similarly, changes in the total sulphur content of sediment may reflect historical changes in open-water sulphate concentration, and ultimately changes in atmospheric deposition. In Plastic Lake sediment, large shifts in both sulphur concentration (peak at approximately 8 cm below the sediment-water interface) and d34S (more negative towards the surface) were found in the upper part of the core. These results are discussed in terms of changes in S deposition and isotope transformations resulting from biological processing.
Bibliography of Canadian Geomorphology