International Geological Journal - Official Journal of the Carpathian-Balkan Geological Association

EXTREMELY ISOTOPICALLY HEAVY SULPHUR IN BARITE CONCRETIONS FROM SLOVAKIA

Pages: 301 - 308

Authors: IVAN REPCOK, MILAN MISIK, KAROL ELIAS, ELIGIA FERENCIKOVA, EMILIA HARCOVA, JOZEF JABLONSKY, IVAN RUCKA

Abstract: Extreme values of δ34S: +105.3 ‰, +105.2 ‰, +87.9 ‰, +87.2 ‰ and +79.7 ‰ were determined in barite concretions from the Aptian-Lower Albian marly limestone of the Krizna Nappe of the Western Carpathians, Slovakia. The phases relation in inclusions from these concretions, and the results of thermo-vacuometric impulse decrepitation analyses indicate temperatures of 50–60 °C, which correspond mostly to secondary inclusions. For the purpose of comparison, barite concretions from Rohoznik, Slovakia, from Gaiseltal, Germany, and from Havana, Cuba, were analyzed. Barite concretions with extremely high δ34S values were formed during late diagenesis of organic matter-rich sediment in the depth range of very low pore water sulphate concentrations, below the sulphate reduction zone.

Keywords: Western Carpathians, fluid inclusions, diagenesis, barite concretions

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