Density of dry peridotite magma at high pressure using an X-ray absorption method
Density of dry peridotite magma at high pressure using an X-ray absorption method
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DOI：
10.2138/am.2010.3143
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发表时间：
2010
影响因子：
3.1
通讯作者：
T. Sakamaki;E. Ohtani;S. Urakawa;A. Suzuki;Y. Katayama
中科院分区：
文献类型：
--
作者：
T. Sakamaki;E. Ohtani;S. Urakawa;A. Suzuki;Y. Katayama
摘要 使用 X 射线吸收法测量橄榄岩岩浆的密度高达 2.5 GPa 和 2300 K。该方法允许在七种不同条件下测量橄榄岩熔体的密度，并阐明密度的压力和温度依赖性。将压力-密度-温度数据与高温 Birch-Murnaghan 状态方程进行拟合，得出等温体积模量 KT0 = 24.0 ± 1.3 GPa、其压力导数 K0′ = 7.3 ± 0.8 以及 2100 时体积模量的导数 (∂KT/∂T)P = -0.0027 ± 0.0017 GPa/K K.与玄武岩熔体相比，橄榄岩熔体具有较大的体积模量及其压力导数，这与之前沉浮实验的结果一致。
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 state 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.