H2S-bearing inclusions in recrystallized halite

Abstract

On a cryogenic investigation solid H2S was successively observed after freezing CO2 in water-poor fluid inclusions in halite of Cambrian Siberian salts. Melting of a H2S solid phase occurs at nearly eutectic temperatures of −95.6°C in CO2-H2S inclusions and in the range −98° to −100°C in CO2-H2S-CH4 or CO2-H2S-N2 inclusions. The compositions of the inclusions were determined by Raman microspectrometry.