Mantle pressures

Guo J, Green TH (1990) Experimental study of barium partitioning between phlogopite and sihcate liquid at upper-mantle pressure and temperature. Lithos 24 83-96 Harrison WJ, Wood BJ (1980) An experimental investigation of the partitioning of REE between garnet and liquid with reference to the role of defects. Contrib Mineral Petrol 72 145-155 Hart SR, Duim T (1993) Experimental cpx/melt partitioning of 24 trace elements. Contrib Mineral Petrol 113 1-8... 

The reaction is carried out in a 3-1. three-necked flask equipped with a mechanical stirrer, heating mantle, pressure-equalized dropping funnel, reflux condenser, and nitrogen inlet. To the... 

Piquet G., Dewaele A., Andrault D., Kunz M., and LeBihan T. (2000) Thermoelastic properties and crystal structure of MgSiOs perovskite at lower mantle pressure and temperature conditions. Geophys. Res. Lett. 27, 21-24. 

Khodyrev O. Y., Agoshkov V. M., and Slutskiy A. B. (1990) The system peridotite—aqueous fluid at upper mantle pressures. Trans. USSR Acad. Set Earth Sci. Sec. 312, 255-258. 

Schreyer W. (1988) Experimental studies on metamorphism of crustal rocks under mantle pressures. Min. Mag. 52, 1-26. 

Guo J. and Green T. H. (1990) Experimental study of barium partitioning between phlogopite and silicate liquid at upper-mantle pressure and temperature. Lithos 24, 83-96. 

Wyllie P. J. and Huang W. L. (1976) Carbonation and melting reactions in the system Ca0-Mg0-Si02-C02 at mantle pressures with geophysical and petrologic applications. Contrib. Mineral. Petrol. 54, 79-107. 

Newton R. C. and Manning C. E. (2000a) Quartz solubility in H20-NaCl and H2O—CO2 solutions at deep crust—upper mantle pressures and temperatures 2—15kbar and 500— 900 °C. Geochim. Cosmochim. Acta 64, 2993—3005. 

Karki BB, Warren MC, Stixmde L, Ackland GJ, Crain J (1997b) Ab initio studies of high-pressure stractural transformations in silica. Phys Rev B 55 3465-3471 Kingma KJ, Cohen RE, Hemley RJ, Mao HK (1995) Transformation of stishovite to a denser phase at lower-mantle pressures. Nature 374 243-245... 

Wentzcovitch RM, Ross NL, Price GD (1995) Ab initio study of MgSiOs and CaSiOs perovskites at lower mantle pressures. Phys Earth Planet Int 90 101-112... 

FIGURE 3.4 Mantle pressure and temperature conditions, calculated from kimberlite xenoliths from the Nikos and Jericho kimberlites in the Slave Province of the Canadian shield, indicate that the xenoliths last equilibrated at depths between 60 ... 

Jephcoat (1998) observed that Xe forms a high-density solid at deep mantle pressures. Sinking of these solids could transport Xe, and possibly some fraction of other noble gases incorporated into this structure, to the deep mantle or core. However, it has not been demonstrated either that such a scarce element ( 20 fg/g) is sufficiently insoluble in other high pressure phases to form a separate phase, or that it can form separate grains in the mantle sufficiently large to sink. This mechanism for transport to the core therefore cannot be evaluated further. 

Angel, R. J., Chopelas, A., and Ross, N. L., (1992) Stability of High-Density Cli-noenstatite at Upper-Mantle Pressures, Nature 358, 322-324. 

Wentzcovitch, R. M., Ross, N. L, and Price, G. D., (1994) Ab initio Study of MgSi03 and CaSi03-Perovskites at Lower Mantle Pressures, Phys. Earth Planet. Int., in press. 

Hu, J., Meade, C., and Mao, H.K. (1994) High temperature phase transition and dissociation of (Mg,Fe)Si03 perovskite at lower mantle pressures, EOS 75, 605. D Arco, P.,Sandrone, G.,Dovesi, R.,Orlando, R. and Saunders, V.R. (1993) A quantum mechanical study of the perovskite structure type of MgSi03, Phys. Chem. Minerals 20, 407-414. 

G. Shen and P. Lazor, Measurement of melting temperatures of some minerals under lower mantle pressures, J. Geophys. Res. 1995, 100, 17699-17713. 

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