Hydrogen, carbon and sulphur isotope ratios in peat: the role of diagenessis and water regimes in reconstruction of past climates |
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Authors: | Mariusz-Orion Jędrysek Grzegorz Skrzypek |
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Affiliation: | (1) Laboratory of Isotope Geology and Geoecology, Institute of Geological Sciences, University of Wroclaw, 50-205 Wrocaw, Cybulskiego 30, Poland |
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Abstract: | We demonstrate that carbon, hydrogen and sulphur isotope ratios both, in the total peat (13Ctp=–25.52 to –28.27, Dtp=–78.67 and –109.24, 34S=4.35 to 19.87), and in cellulose from the peat (13Cnc=–25.06 to –27.33 and Dnc=–92.43 to –118.02) are not affected by postdepositional changes. Therefore, the original isotope composition of plants are in general preserved in the peat and represent an archive of the past environmental variations. These can be supported by (i) good correlations between 13Ctp and 13Cnc, and between Dtp and Dnc, (ii) high horizontal homogeneity of 13Ctp and 13Cnc in the scale of one peat-bog – the same major factor(s) control(s) C isotopic ratios, (iii) no correlation between organic sulphur concentrations and 34S value –34S results from variations in the water level.This revised version was published online January 2005 with corrections to the title. |
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Keywords: | Peat Stable isotopes Hydrogen Carbon Sulphur Cellulose Environmental variations |
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