Effects of the Core-Mantle Interaction on the Distribution of Sulfur in the Earth's Deep Interior

Taku Tsuchiya, Kei Itoh

Presentation information

[E] Oral

S (Solid Earth Sciences ) » S-IT Science of the Earth's Interior & Techtonophysics

[S-IT15] Study of the Earth's Deep Interior - Interaction and Coevolution of the Core and Mantle

Fri. Jun 4, 2021 10:45 AM - 12:15 PM Ch.24 (Zoom Room 24)

convener:Kenji Kawai(Department of Earth and Planetary Science, School of Science, University of Tokyo), Tsuyoshi Iizuka(University of Tokyo), Kenji Ohta(Department of Earth and Planetary Sciences, Tokyo Institute of Technology), Taku Tsuchiya(Geodynamics Research Center, Ehime University), Chairperson:Kenji Kawai(Department of Earth and Planetary Science, School of Science, University of Tokyo), Kenji Ohta(Department of Earth and Planetary Sciences, Tokyo Institute of Technology), Tsuyoshi Iizuka(University of Tokyo), Taku Tsuchiya(Geodynamics Research Center, Ehime University)

12:00 PM - 12:15 PM

[SIT15-06] Effects of the Core-Mantle Interaction on the Distribution of Sulfur in the Earth's Deep Interior

*Taku Tsuchiya¹, Kei Itoh¹ (1.Geodynamics Research Center, Ehime University)

Keywords:Ab initio thermodynamic integration, Metal/silicate sulfur partitioning, Density deficit of the outer core

Although several experiments have been conducted to measeure high-pressure metal/silicate partitioning of sulfur, results scatter considerably at high pressure and it is still largely unclear. While earlier experiments reported a highly siderophile character of sulfur at high-P,T, more recent experiments showed a less siderophile one, suggesting sulfur could be excluded from the major light element candidates of the outer core. Since this property is a key to understanding the effects of the core-mantle interaction on the distribution of sulfur in the Earth's deep interior, we perform ab initio determination of partitiong behavior of sulfur between liquid metal and silicate melt in the deep mantle pressure condition.