18O/16O ratios in sulfate from fossil shells |
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| Authors: | G. Cortecci A. Longinelli |
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| Affiliation: | Laboratorio di Geologia Nucleare, University of Pisa, Pisa ,Italy |
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| Abstract: | The measurement of the oxygen isotopic composition of the sulfate separated from fossil shells supplies no reliable information on the isotopic values of dissolved ocean water sulfate in the past. The results obtained suggest that fossils behave as open systems from the point of view of the possible influence of post-depostional processes on the isotopic composition of shell sulfate. |
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