TY - JOUR
T1 - Measurement of hydrous peridotite magma density at high pressure using the X-ray absorption method
AU - Sakamaki, Tatsuya
AU - Ohtani, Eiji
AU - Urakawa, Satoru
AU - Suzuki, Akio
AU - Katayama, Yoshinori
N1 - Funding Information:
We thank H. Terasaki and T. Sakai of Tohoku University for useful discussions on the manuscript. This work was supported by a Grant-in-Aid for Scientific Research to EO (No. 16340164 ) and SU ( 13440163 and 16340170 ) from the Ministry of Education, Culture, Sports, Science, and Technology of the Japanese Government . This work was also partially supported by the Global Center of Excellence program of Earth and Planetary Science, Tohoku University, Japan . TS was supported by a Research Fellowship of the Japan Society for the Promotion of Science for Young Scientists . The synchrotron radiation experiments were performed at the BL22XU line of the JAEA SPring-8 facility under Common-Use Facility Program of JAEA (Proposal No. 2008A3722 and 2008B3726).
PY - 2009/10/15
Y1 - 2009/10/15
N2 - The density of hydrous peridotite magma containing 5 wt.% H2O was measured at pressures and temperatures up to 4.3 GPa and 2073 K, respectively, using the X-ray absorption method. A fit of pressure-density-temperature data to the high-temperature Birch-Murnaghan equation of state yields isothermal bulk modulus KT = 8.8 ± 1.9 GPa, its pressure derivative K′ = 9.9 ± 3.6 and the temperature derivative of the bulk modulus (∂KT/∂T)P = - 0.0022 ± 0.0015 GPa/K at 1773 K. The small bulk modulus of the hydrous peridotite magma compared with that of the dry peridotite magma reflects the effect of water, which is more compressible than the silicate melt. The partial molar volume of H2O in magma under high pressure conditions was calculated and fitted using the Vinet equation of state. The isothermal bulk modulus was KT = 2.4 ± 1.0 GPa, and its pressure derivative was K′ = 5.7 ± 1.5 at 1973 K.
AB - The density of hydrous peridotite magma containing 5 wt.% H2O was measured at pressures and temperatures up to 4.3 GPa and 2073 K, respectively, using the X-ray absorption method. A fit of pressure-density-temperature data to the high-temperature Birch-Murnaghan equation of state yields isothermal bulk modulus KT = 8.8 ± 1.9 GPa, its pressure derivative K′ = 9.9 ± 3.6 and the temperature derivative of the bulk modulus (∂KT/∂T)P = - 0.0022 ± 0.0015 GPa/K at 1773 K. The small bulk modulus of the hydrous peridotite magma compared with that of the dry peridotite magma reflects the effect of water, which is more compressible than the silicate melt. The partial molar volume of H2O in magma under high pressure conditions was calculated and fitted using the Vinet equation of state. The isothermal bulk modulus was KT = 2.4 ± 1.0 GPa, and its pressure derivative was K′ = 5.7 ± 1.5 at 1973 K.
KW - HO
KW - X-ray absorption method
KW - density
KW - equation of state
KW - high pressure
KW - hydrous peridotite magma
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U2 - 10.1016/j.epsl.2009.07.030
DO - 10.1016/j.epsl.2009.07.030
M3 - Article
AN - SCOPUS:70350133381
SN - 0012-821X
VL - 287
SP - 293
EP - 297
JO - Earth and Planetary Science Letters
JF - Earth and Planetary Science Letters
IS - 3-4
ER -