Sulphur isotopes in anhydrites from Badenian (Middle Miocene) salts of Hrynivka area (Ukrainian Carpathian Foredeep)

Authors

  • Аnatolіy R. Galamay National Academy of Sciences of Ukraine
  • Fanwei Meng Chinese Academy of Sciences
  • Krzysztof Bukowski AGH University of Science and Technology

DOI:

https://doi.org/10.7306/gq.1159

Keywords:

anhydrite, sulphur isotopes, rock salt, Badenian, Miocene, Carpathian Region

Abstract

 Ten new determinations of the stable sulphur isotope content of anhydrite from Badenian rock salt in the Hrynivka 525 borehole (Ukrainian Carpathian Foredeep) show that δ34S values in anhydrite range from +20.2 to +22.7‰ and the average value of δ34S is +21.4 ± 0.3‰. Those values are similar to those of the Neogene marine sulphates. Comparison to other geochemical data (chemical composition of the brine contained in fluid inclusions and the bromine content in halite) suggests that the Badenian Carpathian Foredeep evaporite basin was supplied predominately by seawater solutes where, at different stages of salt accumulation, the influence of continental waters with lighter isotopic compositions of dissolved sulphate was important. The isotopic composition of sulphur (δ 34S) of Badenian seawater, calculated on the basis of sixty analyses of anhydrite related to halite of the Carpathian Region, is approximately +20.3‰, this value being similar to the sulphur isotopic composition of present-day seawater. The δ 34S value for Badenian seawater may have been slightly higher if we consider potential changes of the brine composition of salt-bearing basins caused by inflow of continental waters enriched in light 32S isotopes.

Author Biographies

Аnatolіy R. Galamay, National Academy of Sciences of Ukraine

Institute of Geology and Geochemistry of Combustible Minerals

Fanwei Meng, Chinese Academy of Sciences

State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology

Krzysztof Bukowski, AGH University of Science and Technology

Faculty of Geology, Geophysics and Environment Protection

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Published

2014-03-25

Issue

Vol. 58 No. 3 (2014)

Section

Thematic issue

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