In situ observation of magma at upper mantle conditions

2014 Fiscal Year Final Research Report

• Project/Area Number: 24540514
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Okayama University
• Principal Investigator: YAMASHITA Shigeru 岡山大学, 地球物質科学研究センター, 准教授 (30260665)
• Research Collaborator: CHERTKOVA Nadezda 岡山大学, 大学院自然科学研究科
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: マグマ / 流体 / 高温高圧実験 / その場観察

Outline of Final Research Achievements

Feasibility of in situ observation of magmatic substance was assessed at high pressure and high temperature using an externally heated optical anvil cell. Moissanite was tested as possible high-temperature resistant anvil but no advantage of the moissanite to the regular diamond anvil was found under the controlled reduction-oxidation state near upper mantle conditions. In situ observation of an upper mantle magma analogue was performed using the regular diamond anvil, and the water speciation equilibrium in the melt state was successfully determined as function of pressure and temperature.

Free Research Field

数物系科学