Search Results - "Smyth, Joseph R."
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Diamonds and water in the deep Earth: a new scenario
Published in International geology review (17-02-2016)“…Earth is a water planet, but how much water exists on and in the Earth? Is the water limited to the Earth's surface and limited depths of our planet (molecular…”
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2
Thermoelastic Properties of Fe3+‐Rich Jeffbenite and Application to Superdeep Diamond Barometry
Published in Geophysical research letters (28-03-2024)“…Jeffbenite (Mg3Al2Si3O12) is a tetragonal phase found in so far only in superdeep diamonds, and its thermoelastic parameters are a prerequisite for determining…”
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3
Water Solubility in Aluminous Orthopyroxene and the Origin of Earth's Asthenosphere
Published in Science (American Association for the Advancement of Science) (19-01-2007)“…Plate tectonics is based on the concept of rigid lithosphere plates sliding on a mechanically weak asthenosphere. Many models assume that the weakness of the…”
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Transition metals in the transition zone: partitioning of Ni, Co, and Zn between olivine, wadsleyite, ringwoodite, and clinoenstatite
Published in Contributions to mineralogy and petrology (01-07-2018)“…Ni, Co, and Zn are widely distributed in the Earth’s mantle as significant minor elements that may offer insights into the chemistry of melting in the mantle…”
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High‐Temperature Vibrational Spectra Between Mg (OH)2 and Mg (OD)2: Anharmonic Contribution to Thermodynamics and D/H Fractionation for Brucite
Published in Journal of geophysical research. Solid earth (01-08-2019)“…Brucite, Mg (OH)2, is an important analog for studying the thermodynamics of hydrous silicate minerals in the deep Earth, as well as H/D isotope fractionation…”
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6
Effects of hydration on the elastic properties of olivine
Published in Geophysical research letters (01-07-2008)“…Water, dissolved as hydroxyl (OH)− into the solid silicate minerals of the upper mantle can reduce adiabatic wave speeds through associated defects. Here we…”
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7
Crystal structure, thermal expansivity, and elasticity of OH-chondrodite: trends among dense hydrous magnesium silicates
Published in Contributions to mineralogy and petrology (01-04-2015)“…We report the structure and thermoelastic properties of OH-chondrodite. The sample was synthesized at 12 GPa and 1523 K, coexisting with hydroxyl-clinohumite…”
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In Situ Infrared Spectra for Hydrous Forsterite up to 1243 K: Hydration Effect on Thermodynamic Properties
Published in Minerals (Basel) (01-09-2019)“…Hydrogen substitution has significant effect on the physical properties of olivine, the most abundant mineral in the upper mantle. We collected…”
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The effect of water on the 410-km discontinuity: An experimental study
Published in Geophysical research letters (15-05-2002)“…In order to evaluate the effect of H on the pressure and transition interval of the olivine‐wadsleyite transformation, synthesis experiments were carried out…”
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Hydrogen Effect on the Sound Velocities of Upper Mantle Omphacite
Published in Minerals (Basel) (01-11-2019)“…Clinopyroxene (Cpx) is commonly believed to be the best structural water (hydrogen) carrier among all major upper mantle nominally anhydrous minerals (NAMs)…”
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11
Sound velocities and elastic constants of iron-bearing hydrous ringwoodite
Published in Physics of the earth and planetary interiors (15-06-2004)“…The sound velocities and single-crystal elastic constants of Fo 89 hydrous ringwoodite (γ-Mg 1.7Fe 0.22H 0.16SiO 4) containing ∼10,000 ppm by weight (1 wt.%) H…”
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12
Crystal structure, Raman and FTIR spectroscopy, and equations of state of OH-bearing MgSiO3 akimotoite
Published in Contributions to mineralogy and petrology (01-11-2013)“…MgSiO 3 akimotoite is stable relative to majorite-garnet under low-temperature geotherms within steeply or rapidly subducting slabs. Two compositions of…”
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13
Crystal Structure, Vibrational Spectra on Trivalent-Cation-Doped Rutile and Application in Optical Materials
Published in Journal of physical chemistry. C (29-06-2023)“…Rutile is the most common TiO2 mineral with extensive application in the field of optical materials, and trivalent cations can significantly substitute Ti4+…”
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14
Electrical conductivity anisotropy of dry and hydrous olivine at 8 GPa
Published in Physics of the earth and planetary interiors (01-08-2010)“…The effects of dissolved H 2O on the electrical conductivity and its anisotropy in olivine (Fo 90) at 8 GPa were investigated by complex impedance…”
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15
Comparative compressibility of hydrous wadsleyite and ringwoodite: Effect of H2O and implications for detecting water in the transition zone
Published in Journal of geophysical research. Solid earth (01-12-2015)“…Review of recent mineral physics literature shows consistent trends for the influence of Fe and H2O on the bulk modulus (K0) of wadsleyite and ringwoodite, the…”
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Fe2+ substitution in coexisting wadsleyite and clinopyroxene under hydrous conditions: implications for the 520-km discontinuity
Published in Physics and chemistry of minerals (2020)“…Chemical compositions and crystal structures of coexisting wadsleyite, clinopyroxene, and phase E (synthesized at 1400 °C and 18 GPa under hydrous conditions)…”
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High-temperature Raman and FTIR study of aragonite-group carbonates
Published in Physics and chemistry of minerals (01-01-2019)“…In situ high-temperature Raman and Fourier transform infrared spectra were measured for aragonite, strontianite, cerussite, and witherite at ambient pressure…”
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18
Shear Waves in the Diamond-Anvil Cell Reveal Pressure-Induced Instability in (Mg,Fe)O
Published in Proceedings of the National Academy of Sciences - PNAS (20-04-2004)“…The emerging picture of Earth's deep interior from seismic tomography indicates more complexity than previously thought. The presence of lateral anisotropy and…”
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High pressure crystal chemistry of hydrous ringwoodite and water in the Earth’s interior
Published in Physics of the earth and planetary interiors (15-06-2004)“…The crystal chemistry of Fo 90 hydrous ringwoodite (Mg 1.7Fe 0.22H 0.15SiO 4) containing 0.93% H 2O by weight has been studied at pressures up to 11.2 GPa by…”
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In-situ high-pressure and high-temperature spectroscopic studies of phengite in ultrahigh-pressure eclogite: implications for water transport during ultra-deep continental subduction
Published in Physics and chemistry of minerals (01-07-2022)“…Pressure and temperature responses of natural phengite [K 0.93 Na 0.03 (Al 1.46 Mg 0.45 Fe 0.09 )(Si 3.59 Al 0.39 Ti 0.02 )O 10 (OH 1.94 F 0.06 )] in…”
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