[S-MP23] 鉱物の物理化学

[SMP23-P01] GHzーDAC音速法による下部マントル鉱物の弾性波速度測定：フェロペリクレース33GPaでの測定結果

加藤 拓人¹、*米田 明¹、近藤 忠¹、山崎 大輔² (1.大阪大学理学研究科宇宙地球専攻、2.岡山大学惑星物質研究所)

キーワード：弾性、マントル、GHz音速法、ダイヤモンド・アンビル・セル、フェロペリクレース

We have extended the pressure range of the GHz-DAC ultrasonics beyond 30 GPa. We selected ferropericlase (Mg, Fe)O as the first lower mantle mineral to measure P and S wave velocities at the lower mantle condition; ferropericlase is the second most abundant mineral in the lower mantle and is known to undergo the spin transition in the pressure range of 40-60 GPa. Currently, we have succeeded the simultaneous P and S wave measurement at 33 GPa; we would like to show further results at the presentation.