Mathematics – Logic
Scientific paper
Jan 1964
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1964gecoa..28...23d&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 28, Issue 1, pp.23-44
Mathematics
Logic
20
Scientific paper
The O 18 / O 16 and C 13 / C 12 ratios of coexisting sedimentary dolomites and calcium carbonates from a variety of environments, modes of formation and geological ages were measured. The data reflect the processes of dolomitization of calcium carbonates and their subsequent history. Dolomites usually have O 18 values characteristic of marine calcium carbonates or values of diagenetically altered marine limestones. Invariably the O 18 of dolomite are the same or greater than that of the coexisting calcite. This is in accordance with previously postulated mechanisms based on isotope measurements of hydrothermal and of laboratory synthesized cogenetic calcites and dolomites. The carbon isotope values of the measured carbonates are usually within the range found for marine limestones.
Degens Egon T.
Epstein Samuel
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