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Detailed Reference Information |
Secco, R.A., Manghnani, M.H. and Liu, T. (1991). Velocities and compressibilities of komatiitic melts. Geophysical Research Letters 18: doi: 10.1029/91GL01803. issn: 0094-8276. |
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Ultrasonic measurements of compressional wave velocities for six komatiitic melts containing 13--30 wt% MgO are reported in the frequency range 3--20 MHz and in the temperature range 1280--1661 ¿C. Melts with less than about 20 wt% MgO have velocities that are 6% lower and relaxed compressibilities, &bgr;r, that are 15% higher than melts with more than about 20 wt% MgO. The general trend of increasing velocity with increasing MgO content correlates well with increasing depolymerization (decreasing molar volume) of the melts as reflected in the NBO/T, (CaO+MgO)/Al2O3, and Al/(Al+Si) ratios. The value of d&bgr;r/dw (w=wt% MgO) for the high MgO melts is more than four times greater than &Bgr;r/dw for the low MgO melts. ¿ American Geophysical Union 1991 |
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Abstract |
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Keywords
Mineral Physics, Elasticity and anelasticity, Mineral Physics, Physical thermodynamics, Mineralogy, Petrology, and Rock Chemistry, Composition of the mantle and core, Mineralogy, Petrology, and Rock Chemistry, Experimental mineralogy and petrology |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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