TY JOUR TI Framboidal pyrite formation in the bottom sediments of the South Caspian Basin under conditions of hydrogen sulfide contamination KW Framboidal pyrite KW the Caspian Sea KW the South Caspian Basin KW authigenic minerals KW hydrogen sulfide contamination KW sulfate-reducing bacteria JO Russian Journal of Earth Sciences AU Kozina, N.. AU Reykhard, L.. AU Dara, O.. AU Gordeev, V.. PY 2018 IS 18 PB Geophysical Center of the Russian Academy of Sciences