HiroshimaUniversity

OsakaUniversity

UniversityofTokyo

ChibaIns7tuteofTechnology

Simula'onsofMagmaGenera'onbyGiantImpacts-ResponseofSilicateMagmasatExtreme

HighPressuresandTemperatures–

willappearinScienceAdvances�

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A

C

D

B

• 

• Mg

2

SiO4

• 

• 

• 

• 

VISAR SOP

SiO2( )SOP

A

B

C

Al( )

GekkoXII

[103K]

MgO-

SiO2

MgO

MgO Fo

MgOliq.

Foliq.

B2

B11

3

2

4

<~250GPa

~280GPa

~400GPa

>~500GPa

1

2

3

4

Fo MgO

liq

liq

liq+B1

liq+B2

liq

liq+B2

liq+B1liq

A B

liqliq+B1+B2

5

5

B1+B2

~300GPa

ppv+B1MgOppv+liq

MgO-SiO2

300

16GPa20GPa

26GPa

(Onishi2015)

PV PPV

Fo

MgO+PPV

MgO+L

SiO2

(GPa)

200100

0.5

0.4

•  ScienceAdvances

•  28 8

4

• 

•