Browsing by Author "Carroll M.R."
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Browsing by Author "Carroll M.R."
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Carroll M.R.; Sutton S.R.; Rivers M.L.; Woolum D.S. (1993)Kr diffusivity and solubility have been measured in glasses of SiO2, NaAlSi3O8, KAlSi3O8 and rhyolitic composition, under experimental conditions ranging from 700° to 950°C and 215 to 3150 bar. Kr diffusion in SiO2 (Sil) ...
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Draper D.S.; Carroll M.R. (1995)We have determined argon solubility and diffusivity in SiO2, NaAlSi3O8, and rhyolitic composition glasses exposed to an equimolar Ar gas mixture at 1225-2500 bars and 500-850°C. The diffusivity results from the mixedAr ...
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Gardner J.E.; Hilton M.; Carroll M.R. (2000)High melt viscosity is thought to hinder bubble growth in water-bearing silicate melts, and viscosities above ~109 Pa s may prevent growth and viscously quench a bubbly liquid. To investigate the influence of melt viscosity ...
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Höskuldsson A.; Sparks R.S.J.; Carroll M.R. (2006)The Kverkfjöll area, NE Iceland is characterised by subglacial basalt pillow lavas erupted under thick ice during the last major glaciation in Iceland. The water contents of slightly vesiculated glassy rims of pillows in ...
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Gardner J.E.; Hilton M.; Carroll M.R. (1999)Numerical models predict that rapid ascent of hydrous magma can lead to supersaturation of dissolved volatile constituents, possibly leading to explosive eruption. We have performed controlled decompression experiments to ...
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Carroll M.R.; Wyllie P.J. (1989)Experiments at 15 kb in the tonalite-peridotite-H2O system provide information on some of the phase equilibrium factors that may influence reaction and assimilation processes between quartznormative magmas and ultramafic ...
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Carroll M.R.; Draper D.S. (1994)The abundance and isotopic composition of the trace amounts of noble gases found in magmas provide insights into the large-scale differentiation of the Earth, the origin of the atmosphere, and potentially into the degassing ...
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Brooker R.A.; Carroll M.R.; Draper D.S.; Wartho J.A.; Kelley S.P. (1998)An ultra-violet laser ablation microprobe (UVLAMP) has been applied for the first time to investigate argon partition coefficients for olivines and clinopyroxenes grown from silicate melts at 1 bar argon pressure. These ...
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Blank J.G.; Stolper E.M.; Carroll M.R. (1993)Concentrations of carbon dioxide and water dissolved in glasses quenched from rhyolitic melts equilibrated with H_2O-CO_2 fluids at 850°C and 750 bar were measured using infrared spectroscopy; concentrations of H_2O and ...
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Brooker R.A.; Kohn S.C.; Holloway J.R.; McMillan P.F.; Carroll M.R. (1999)CO2 solubility and speciation in melts along the NaAlO2-SiO2 join from Ne (NaAlSiO4) to a model rhyolite (Ry) composition (NaAlSi6O14), have been investigated as a function of pressure (10 to 25 kb) and temperature (1450 ...
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Withers A.C.; Wood B.J.; Carroll M.R. (1998)The OH contents of pyrope garnets synthesised at 1000°C and pressures between 2 and 13 GPa have been measured by infrared spectroscopy. We find that under the same conditions of pressure, temperature, aH2O and aSiO2 the ...
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Paris E.; Giuli G.; Carroll M.R.; Davoli I. (2001)The geochemical behavior of sulfur in magmas depends strongly on the oxidation state of sulfur, but this s not easily determined by standard analytical methods. We have measured XANES absorption spectra at the sulfur K-edge ...
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