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Browsing ELibrary by Title
Now showing items 4153-4172 of 26297
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(2005)The effect of lattice disorder and mineral surface area on the reactivity of finely ground fluorite was studied on ball-milled powders. Structural information was provided by X-ray whole powder pattern modeling (WPPM). The ...
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(2001)SLB acknowledges many educational and entertaining conversations with Hal Helgeson (ranging from kinetics to bent head morphologies) over the last 17 years.To investigate the effects of changing the Al/Si ratio on plagioclase ...
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(1999)A large body of recent work has linked the origin of Si-Al-rich alkaline glass inclusions to metasomatic processes in the upper mantle. This study examines one possible origin for these glass inclusions, i.e., the dissolution ...
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(2001)The solubilities of forsterite, fayalite, enstatite, ferrosilite, hedenbergite, diopside, anorthite, high-albite, magnetite, hematite, ulvöspinel, ilmenite, F-apatite and OH-apatite and olivine, plagioclase, orthopyroxene, ...
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(2006)We have conducted experiments on dissolution of quartz, albite, orthoclase, and corundum into H2O-saturated haplogranite melt at 800°C and 200?MPa over a duration of 120–1488?h with the aim of ascertaining the diffusive ...
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(2000)In several experiments albite, orthoclase, diopside, muscovite, sepiolite, magadiite, kenyaite, natrosilite, δ-Na2Si2O5, sodium metasilicate, kanemite, quartz, opal, amorphous silica, and silica gel were dissolved in ...
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DISSOLUTION OF STRONTIANITE AT HIGH P-T CONDITIONS: AN IN-SITU SYNCHROTRON X-RAY FLUORESCENCE STUDY (2003)In-situ measurements of the amount of dissolution of carbonate minerals at high pressures (up to 3.6 GPa) and temperatures (up to 523 K) are reported. Using an externally heated diamond anvil cell (DAC) and synchrotron ...
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(2006)Dissolution of natural mafic magmatic enclaves in a hydrous leucogranitic synthetic melt has been tested experimentally. Results suggest that the mechanism of enclave dissolution is a potential hybridization process in ...
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(2001)Previous research by our group (e.g., [Chem. Geol. 132 (1996) 25; Geochim. Cosmochim. Acta 64 (2000) 1363]) has shown that an aerobic Pseudomonas mendocina bacterium enhances Fe(hydr)oxide dissolution in order to obtain ...
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(1999)Experiments describing the extent of dissolution of β-MnOOH(s) suspensions vs. time using measurements of both total dissolved Mn and Mn(III) complex species show that the ligands pyrophosphate (P2O74-), ethyelenediamine ...
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(1998)In the system Di–Ab–An–H2O, melt inclusions in plagioclase were reproducibly formed in a series of partial dissolution experiments, and the compositional differences from the surrounding matrix melt were evaluated. At 200 ...
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(1996)Scanning Force Microscopy (SFM) was used to develop a method which can provide quantitative kinetic data of crystal growth and dissolution. Based on observations of single crystal faces in monolayer resolution, morphology ...
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(1998)This paper reports on our use of scanning force microscopy (SFM) to study calcite dissolution rates. Until now, calculation of rates has been limited to surfaces on which steps retreat at an isotropic velocity. More commonly, ...
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(2002)Experimentally observed dissolution rates of minerals in an aqueous solution are determined by surface reaction rates, mass transport by molecular diffusion through a diffusion boundary layer (DBL) and the morphology of ...
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(2004)To help constrain models involving the chemical stability and lifetime of gas clathrate hydrates exposed at the seafloor, dissolution rates of pure methane and carbon-dioxide hydrates were measured directly on the seafloor ...
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(1986)The dissolution rates of the major upper mantle minerals olivine, orthopyroxene, clinopyroxene, spinel, and garnet have been determined in an alkali basalt melt at superliquidus temperatures and 5, 12, and 30 kb. At low ...
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(2006)Variability of dissolved Fe2+ and ∑H2S concentrations in porewaters were studied, using cathodic stripping voltammetry (CSV) microelectrodes, in sediments overlain by hypoxic waters in the summer from the southeastern ...
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(2006)The N, P, and S cycles in pristine forests are assumed to differ from those of anthropogenically impacted areas, but there are only a few studies to support this. Our objective was therefore to assess the controls of N, ...
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(2006)The circulation of hydrothermal fluid through the upper oceanic crustal reservoir has a large impact on the chemistry of seawater, yet the impact on dissolved organic carbon (DOC) in the ocean has received almost no ...
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(1996)Fe(III) and Fe(II) organic complexes were determined by spectroscopic methods after sephadex gel fractionation of salt marsh porewaters during June and July 1993. Fe(III), which is a significant anaerobic oxidant for sulfide ...
Now showing items 4153-4172 of 26297