H 2S-bearing inclusions in recrystallized halite

Abstract

On a cryogenic investigation solid H 2S was successively observed after freezing CO 2 in water-poor fluid inclusions in halite of Cambrian Siberian salts. Melting of a H 2S solid phase occurs at nearly eutectic temperatures of −95.6°C in CO 2H 2S inclusions and in the range −98° to −100°C in CO 2H 2SCH 4 or CO 2H 2SN 2 inclusions. The compositions of the inclusions were determined by Raman microspectrometry.