4:45 PM - 5:00 PM
[SMP38-18] Melting experiments on Fe-O-S alloys to core pressures
Keywords:core, light element, oxygen, sulfur, high pressure, melting
A couple of homogeneous Fe–O–S samples with different O/S ratios were prepared by a sputtering method and used as starting materials. The samples were compressed to high pressure in a diamond-anvil cell and subsequently melted by heating with a laser. The cross sections of recovered samples were prepared by an FIB. Their textural and compositional characterizations were made with EDS and EPMA. The positions of cotectic lines and eutectic point were examined at each pressure from the compositions of liquid and coexisting solid. These results obtained in the Fe–O–S ternary are indeed consistent with the eutectic points previously found in the Fe–O and Fe–Fe3S binary systems.
At the presentation, we will discuss the possible range of liquid outer core composition in the Fe–O–S ternary system.