Melting temperature determination in the Earth's core conditions

2015 Fiscal Year Final Research Report

• Project/Area Number: 24684038
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Okayama University (2015); Tokyo Institute of Technology
• Principal Investigator: Tateno Shigehiko 岡山大学, 地球物質科学研究センター, 准教授 (30572903)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 地球中心核 / 高温高圧実験 / ダイヤモンドアンビルセル

Outline of Final Research Achievements

Phase relations were investigated for Fe, Fe-Si, and Fe-S systems over 200 GPa. High-pressure and -temperature experiments were performed by laser-heated diamond anvil-cell technique. Presence/absence of melting upon heating was determined by a combination of in-situ and ex-situ analysis of synchrotron X-ray and chemical analysis on a recovered sample. Obtained melting curve of core materials tightly constrained the inner-core/outer-core boundary temperature of the present Earth.

Free Research Field

実験岩石学