TY - JOUR
T1 - In-situ measurement of viscosity and density of carbonate melts at high pressure
AU - Dobson, David P.
AU - Jones, Adrian P.
AU - Rabe, Richard
AU - Sekine, Toshimori
AU - Kurita, Kei
AU - Taniguchi, Takashi
AU - Kondo, Tadashi
AU - Kato, Takumi
AU - Shimomura, Osamu
AU - Urakawa, Satoru
N1 - Funding Information:
The authorsw ould like to thankD r. N.L. Ross andt hreea nonymourse viewersfo r theirc onstructive reviewso f the manuscripDt. .P.D. acknowledgerse - ceipt of a NERC studentshipT.h e Work in Japan was fundedi n part by the British Council and the JSPS. [PTI
PY - 1996/9
Y1 - 1996/9
N2 - We present the first measurements of carbonate melt viscosity and density at mantle pressures and temperatures and provide important data for modelling carbonatite behaviour within the mantle. Synchrotron radiation was used to observe falling spheres with high atomic number in situ, allowing precise determination of high terminal velocities over short fall distances. The measured viscosities of 1.5 (5) × 10-2 to 5 (2.5) × 10-3 Pas are the lowest of any known terrestrial magma types and these measurements extend the region of measurable viscosity at high pressure by at least 2 orders of magnitude. Accurate measurements of K2Ca(CO3)2 melt density were performed at atmospheric pressure: ρ (g/cm3) = 2.39(2) - 3.85(15) × 10-4T(0C) and are in complete agreement with the predictions of Wolff (1995). The high-pressure density measurements also agree well with molecular dynamics predictions of carbonate melt compressibility.
AB - We present the first measurements of carbonate melt viscosity and density at mantle pressures and temperatures and provide important data for modelling carbonatite behaviour within the mantle. Synchrotron radiation was used to observe falling spheres with high atomic number in situ, allowing precise determination of high terminal velocities over short fall distances. The measured viscosities of 1.5 (5) × 10-2 to 5 (2.5) × 10-3 Pas are the lowest of any known terrestrial magma types and these measurements extend the region of measurable viscosity at high pressure by at least 2 orders of magnitude. Accurate measurements of K2Ca(CO3)2 melt density were performed at atmospheric pressure: ρ (g/cm3) = 2.39(2) - 3.85(15) × 10-4T(0C) and are in complete agreement with the predictions of Wolff (1995). The high-pressure density measurements also agree well with molecular dynamics predictions of carbonate melt compressibility.
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U2 - 10.1016/0012-821x(96)00139-2
DO - 10.1016/0012-821x(96)00139-2
M3 - Article
AN - SCOPUS:0030436823
SN - 0012-821X
VL - 143
SP - 207
EP - 215
JO - Earth and Planetary Science Letters
JF - Earth and Planetary Science Letters
IS - 1-4
ER -