Browsing by Author "O'Neill H.S.C."
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Browsing by Author "O'Neill H.S.C."
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Jayasuriya K.D.; Campbell S.J.; O'Neill H.S.C.; Berry A.J. (2004)Fe3+/ΣFe ratios were determined from Mössbauer spectra recorded for a series of 17 anorthite-diopside eutectic glasses containing 1 wt% 57Fe2O3 quenched from melts equilibrated over a range of oxygen fugacities from fO2 ∼ ...
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Ertel W.; Dingwell D.B.; O'Neill H.S.C. (1997)The effect of melt composition on the solubility of Ni in haplobasaltic melts was investigated at 1 atm via additions of SiO2 (Quartz), Mg2SiO4 (Forsterite), and Na2SiO3 (Na-metasilicate) to the 1 atm diopside-anorthite ...
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O'Neill H.S.C.; Dingwell D.B.; Borisov A.; Spettel B.; Palme H. (1995)The highly siderophile elements (HSE's: Ru, Rh, Pd, Re, Os, Ir, Pt and Au) and those elements with distribution coefficients between Fe-rich metal and silicate phases which exceed 10⁴. The large magnitude of these distribution ...
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Falloon T.J.; Green D.H.; O'Neill H.S.C.; Hibberson W.O. (1997)We present results of an experimental study to determine the nature of minimum to near-minimum melt compositions in equilibrium with upper mantle peridotite mineralogy at 1 GPa. We confirm earlier conclusions that anhydrous ...
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Ertel W.; O'Neill H.S.C.; Sylvester P.J.; Dingwell D.B. (1999)The solubilities of Platinum (Pt) and Rhodium (Rh) in a haplobasaltic melt (anorthite-diopside eutectic composition) have been determined experimentally by using the mechanically assisted equilibration technique at 1300°C, ...
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Ertel W.; O'Neill H.S.C.; Dingwell D.B.; Spettel B. (1996)The solubility of tungsten (W) in a haplobasaltic melt has been determined as a function of oxygen fugacity in the temperature range 1300-1500oC using the mechanically assisted equilibrium technique of Dingwell et al. ...
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Holzheid A.; O'Neill H.S.C. (1995)The free energy of formation of Cr2O3, defined by the reaction2 Cr + 32 O2 = Cr2O3, has been measured electrochemically using a yttria-doped thoria (YDT) solid electrolyte, in the temperature range from 900 to 1400 K. Fe ...
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O'Neill H.S.C.; Eggins S.M. (2002)The thermodynamic theory describing the partitioning of trace elements between crystals and silicate melt implies that partition coefficients should depend on the major-element composition of the melt from two different ...
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Nell J.; O'Neill H.S.C. (1997)The oxygen potentials of the reactions 43Rh + O2 = 23β-Rh2O3 and 23MgO + 43Rh + O2 = 23MgRh3+2O4 were measured using electrochemical cells of the type Pt, metal + oxide #CSZ#YDT (air), Pt. Relative to a reference pressure ...
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Mavrogenes J.A.; O'Neill H.S.C. (1999)The sulfur contents at sulfide saturation (SCSS) of a basaltic and a picritic melt have been measured experimentally as a function of pressure and temperature from 5 to 90 kb and 1400-1800°C, using piston-cylinder and ...
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Ertel W.; O'Neill H.S.C.; Sylvester P.J.; Dingwell D.B.; Spettel B. (2001)The solubility of rhenium (Re) in a haplobasaltic melt (anorthite-diopside eutectic composition) has been experimentally determined using the mechanically assisted equilibration technique at 1400°C as a function of oxygen ...
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Woodland A.B.; O'Neill H.S.C. (1997)The technique of using noble metal alloys as redox sensors has been adapted for use in hydrothermal experiments in the piston-cylinder apparatus at the reduced conditions of the iron-wustite (IW) buffer. The required high ...
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