Isotopic abundances of water of crystallization of gypsum from the Miocene evaporite formation, Carpathian Foredeep, Poland

Details Isotopic abundances of water of crystallization of gypsum from the Miocene evaporite formation, Carpathian Foredeep, Poland Isotopic abundances of water of crystallization of gypsum from the Miocene evaporite formation, Carpathian Foredeep, Poland

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46..293h&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 46, Issue 2, pp.293-296

Physics

2

Scientific paper

For sulfates of Miocene evaporites in the Carpathian Foredeep, the waters of crystallization of gypsum (w.c.g.) have D = -38 to -113%. and 18 O = 0 to -11%. (SMOW). The 34 S and 18 O values of the sulfates are uniform and consistent with a marine origin. It is proposed that the original w.c.g. was equilibrated with marine water. Subsequently, it re-equilibrated towards very isotopically light water ( D ~ -100%., 18 O ~ -14%) during a glacial or postglacial period and is now trending towards current waters circulating through the deposits ( D ~ -50%., 18 ~ -7%). The extent of reequilibration increased with decreasing crystal size.

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