The isotopic composition of plant sulfur |
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Authors: | FV Chukhrov LP Ermilova VS Churikov LP Nosik |
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Institution: | Institute of Ore Geology, U.S.S.R. Academy of Sciences, Moscow, U.S.S.R. |
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Abstract: | The isotopic composition of sulfur has been studied in plants representative of various regions of the U.S.S.R., two oceanic islands, and atmospheric precipitations on land and in marine areas. In soils, the isotopic composition of sulfur in the atmospheric water varies as a result of sulfate reduction (increase of δ34S of the soil sulfate) and sulfate regeneration from hydrogen sulfide. The sulfur in plants from the oceanic islands has characteristically higher values of δ34S than the sulfur in the plants and in the atmospheric water of the continents. Compared to sea water, the sulfur from the island plants that were studied contains a considerably lesser proportion of the 34S isotope. This can be explained by the significant role in such plants of the sulfur of the atmospheric air masses coming from the continents. |
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