Dynamics of deep magma ocean explored by the ultrahigh-pressure multiple spectroscopic data on silicate melts

2014 Fiscal Year Final Research Report

• Project/Area Number: 24654170
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Tohoku University
• Principal Investigator: MURAKAMI Motohiko 東北大学, 理学(系)研究科(研究院), 准教授 (50401542)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 地球深部

Outline of Final Research Achievements

We have conducted the high-pressure Brillouin scattering and Raman scattering measurements on silicate glasses to extract the physical properties of silicate magmas such as its structure and thermal conductivity combined with synchrotron facility. Using newly developped measurement system for sound velocity and structural data, we succeeded to measure the sound velocity and Raman scattering data above 100 GPa, and the optical absorption data above 80 GPa.
The results demonstrated that the silicate glasses as the analog of silicate melts drastically densified above 100 GPa, and the radiative thermal conductivity significantly decreased with pressure.

Free Research Field

超高圧力実験