Elemental sulfur of bacterial origin in the lacustrine evaporites of the Polatli-Sivrihisar Neogene Basin (Central Anatolia, Turkey)

• Autores: Erdogan Tekin
• Localización: Carbonates and Evaporites, ISSN 0891-2556, Vol. 21, Nº. 1, 2006, págs. 33-39
• Idioma: inglés
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• Resumen

  • This study reports occurrences of disseminated elemental sulfur in gypsum of the late Miocene Sakarya Formation in Polath-Sivrihisar Basin, located in the Central Anatolia Neogene Basins. Thin-section and scanning-electron microscope studies indicate that the sulfur minerals have three main morphologies including lacy, combined spheroidal-lobous, and flabellate-grape-like structures. Studies on the elemental sulfur occurrences suggest that the sulfur was formed by reduction of Sakarya Formation gypsum through the metabolic activities of sulphate-reducing bacteria. This observation is also supported by the trace-element concentrations obtained on both the gypsum and the elemental sulfur samples.