Abstract
The density of a peridotite magma was measured up to 2.5 GPa and 2300 K using an X-ray absorption method. The method allowed measurement of the density of a peridotite melt under seven. different conditions and clarified the pressure and temperature dependence of the density. A fit of the pressure-density-temperature data to the high-temperature Birch-Murnaghan equation of stete yielded the isothermal bulk modulus, KT0 = 24.0 ± 1.3 GPa, its pressure derivative, K0′ = 7.3 ± 0.8, and the derivative of bulk modulus (∂KT/∂T) P= -0.0027 ± 0.0017 GPa/K at 2100 K. The large bulk modulus and its pressure derivative of the peridotite melt compared with that, of basaltic melt is consistent with previous results from sink-float experiments.
Original language | English |
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Pages (from-to) | 144-147 |
Number of pages | 4 |
Journal | American Mineralogist |
Volume | 95 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2010 Jan |
Keywords
- Density
- Equation of state
- High pressure
- Peridotite melt
- X-ray absorption method
ASJC Scopus subject areas
- Geophysics
- Geochemistry and Petrology