[S-IT03] Structure and dynamics of Earth and Planetary deep interiors

[SIT03-P03] 半導体ダイヤモンドヒーターによる高圧力下での高温発生

*伊藤 英司¹、米田 明¹、Longjian Xie¹、辻野 典秀¹ (1.岡山大学地球物質研究センター)

キーワード：高温発生, 半導体ダイヤモンドヒーター, 川井式　装置, 焼結ダイヤモンド

Melting relations of the Earth materials are information essentially important to clarify the early differentiation and evolution of the Earth. Nevertheless melting experiments using the Kawai-type apparatus under mid mantle conditions are impossible because of limited temperature generation. Following Shatsky et al. (2009), we have tried to generate temperatures higher than 3500 K adopting B-doped semiconductor diamond heater. In order to carry out melting experiments at higher than 50 GPa, we adopt sintered diamond anvils. Temperature (T) is estimated by extrapolating a T-W (power) curve constructed up to 2600 C based on the W/re thermocouple measurement. Our T-generation reached ca. 4700 C at 55GPa.