Browsing ELibrary by Author "Frost D.J."

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A NEW OXYGEN-DEFICIENT PEROVSKITE PHASE CA(FE0.4SI0.6)O2.8 AND PHASE RELATIONS ALONG THE JOIN CASIO3-CAFEO2.5 AT TRANSITION ZONE CONDITIONS

Bläß U.W.; Langenhorst F.; Boffa-Ballaran T.; Seifert F.; Frost D.J.; McCammon C.A. (2004)

A new oxygen-deficient perovskite with the composition Ca(Fe0.4Si0.6)O2.8 has been synthesised at high-pressure and -temperature conditions relevant to the Earths transition zone using a multianvil apparatus. In contrast ...
EXPERIMENTAL CONSTRAINTS ON CRYSTALLIZATION DIFFERENTIATION IN A DEEP MAGMA OCEAN

Walter M.J.; Nakamura E.; Tr?nnes R.G.; Frost D.J. (2004)

Major and trace element mineral/melt partition coefficients are presented for phases on the liquidus of fertile peridotite at 23–23.5 GPa and 2300 °C. Partitioning models, based on lattice-strain theory, are developed for ...
EXPERIMENTAL MEASUREMENTS OF THE FUGACITY OF CO2 AND GRAPHITE/DIAMOND STABILITY FROM 35 TO 77 KBAR AT 925 TO 1650°C

Frost D.J.; Wood B.J. (1997)

The fO2 of the equilibrium between graphite and C-O fluid has been determined at 35–77 kbar and 925-1650°C using metal-metal oxide reactions as redox sensors and by employing an assemblage of Co-Pd alloy and CoO as a sliding ...
EXPERIMENTAL MEASUREMENTS OF THE PROPERTIES OF H2O-CO2 MIXTURES AT HIGH PRESSURES AND TEMPERATURES

Frost D.J.; Wood B.J. (1997)

We have experimentally determined volumes of H2O-CO2 mixtures between 9.5 and 19.4 kbar at 1100-1400°C. A synthetic fluid inclusion technique (Sterner and Bodnar, 1991) was used to capture H2O-CO2 fluids of known composition ...
FE-MG PARTITIONING BETWEEN RINGWOODITE AND MAGNESIOWUSTITE AND THE EFFECT OF PRESSURE, TEMPERATURE AND OXYGEN FUGACITY

Frost D.J.; Langenhorst F.; van Aken P.A. (2001)

The partitioning of Mg and Fe between magnesiowüstite and ringwoodite solid solutions has been measured between 15 and 23 GPa and 1200–1600°C using both Fe and Re capsule materials to vary the oxidation conditions. The ...
HIGH-PRESSURE PARTIAL MELTING OF GARNET PYROXENITE: POSSIBLE MAFIC LITHOLOGIES IN THE SOURCE OF OCEAN ISLAND BASALTS

Kogiso T.; Hirschmann M.M.; Frost D.J. (2003)

Many ocean island basalts (OIB) that have isotopic ratios indicative of recycled crustal components in their source are silica-undersaturated and unlike silicic liquids produced from partial melting of recycled mid-ocean ...
LOCAL RELAXATION AROUND [6]CR3+ IN SYNTHETIC PYROPE-KNORRINGITE GARNETS, [8]MG3 [6] (AI1-XCRX 3+)2 [4]SI3O12, FROM ELECTRONIC ABSORPTION SPECTRA

Taran M.N.; Platonov A.N.; Langer K.; Abs-Wurmbach I.; Frost D.J. (2004)

Pyrope-knorringite garnets, Mg3(Al1-X Cr3+X)2Si3O12 with X=0.25, 0.50, and 1.00, were synthesized between 9 and 16 GPa and 1300 and 1600 °C, using multianvil high-pressure techniques. The garnets with X=0.25 and 0.50 are ...
PERIDOTITE MELTING AND MINERAL-MELT PARTITIONING OF MAJOR AND MINOR ELEMENTS AT 22-24.5 GPA

Tronnes R.G.; Frost D.J. (2002)

Melting experiments at 2100-2400°C and 22-24.5 GPa to determine the liquidus to solidus phase relations and element partitioning coefficients were performed on different peridotite compositions: a pyrolite model and a KLB-1 ...
PHASE RELATIONS AND STABILITY OF MAGNETOPLUMBITE- AND CRICHTONITE-SERIES PHASES UNDER UPPER-MANTLE P-T CONDITIONS: AN EXPERIMENTAL STUDY TO 15 GPA WITH IMPLICATIONS FOR LILE METASOMATISM IN THE LITHOSPHERIC MANTLE

Konzett J.; Yang H.; Frost D.J. (2005)

High-pressure–high-temperature experiments were performed in the range 7–15 GPa and 1300–1600°C to investigate the stability and phase relations of the K- and Ba-dominant members of the crichtonite and magnetoplumbite ...
SHEAR DEFORMATION EXPERIMENTS OF FORSTERITE AT 11 GPA - 1400°C IN THE MULTIANVIL APPARATUS

Couvy H.; Frost D.J.; Heidelbach F.; Mackwell S.; Cordier P.; Nyilas K.; Ungár T. (2004)

Synthetic forsterite samples were shear-deformed at 11 GPa, 1400°C in the multianvil apparatus. The deformation microstructures have been characterised by SEM, EBSD, X-ray diffraction peak broadening and strain anisotropy ...
THE EFFECT OF AL2O3 ON FE-MG PARTITIONING BETWEEN MAGNESIOWUSTITE AND MAGNESIUM SILICATE PEROVSKITE

Frost D.J.; Langenhorst F. (2002)

We have measured the partitioning of Fe2+, Fe3+ and Mg2+ between magnesiowustite and magnesium silicate perovskite in both Al2O3-bearing and Al2O3-free systems. Starting compositions with varying Fe/(Fe+Mg) molar ratios ...
THE STRUCTURE AND SHARPNESS OF (MG,FE)2SIO4 PHASE TRANSFORMATIONS IN THE TRANSITION ZONE

Frost D.J. (2003)

To calculate accurately the pressure interval and mineral proportions (i.e. yields) across the olivine to wadsleyite and wadsleyite to ringwoodite transformations requires a detailed knowledge of the non-ideality of Fe-Mg ...

Browsing ELibrary by Author "Frost D.J."

Browsing ELibrary by Author "Frost D.J."

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