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Showing 1 to 20 of 264 for “"olivine"”.
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Order and chaos in the olivine underworld: two mechanisms for the formation of basal olivine layers
… are increasingly inclined to interpret olivine cumulate layers in small intrusive bodies as separately injected slurries, as opposed to the result of in-situ differentiation. Two sills with basal olivine layers, the 0601 sill, Victoria Island, NWT, Canada, and the Palisades Sill, Fort …
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Plastic flow of single-crystal olivine.
Thesis. 1975. Ph.D. cn--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Creep of olivine during hot-pressing.
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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An investigation of hydrogen gas in olivine
… gas occurs within fluid inclusions contained by olivine crystals. In the present study the H2 content in olivine samples was investigated using optical microscopic and Raman spectroscopic analysis. The current study failed to confirm the occurrence of the hydrogen gas within fluid inclusions …
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An experimental investigation of dislocation glide in olivine
Thesis. 1976. M.S. cn--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Electrochemically-induced phase transition in olivine type cathode materials
… battery performance are also investigated. Using olivine-type phosphates (i.e. phospho-olivines) with varying composition and particle size as model system, strain accommodation mechanism within single nanoparticles (Chapter 2 to 3) and mesoscale kinetics of nanoparticle aggregates (Chapter 4 to …
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Magnesium-manganese solid solution in the olivine and humite groups
… collected for four compositionally-intermediate olivine and humanities and their crystal structures were refined by full-matrix, least-squares techniques to investigate cation ordering. Forsterite from Langban, Sweden [(Mg₀.₅₁₉Mn₀.₄₈₂Ca₀.₀₀₃Fe₀.₀₀₁)₂SiO₄, Pbnm, a = 4.94(2) b = 10.419(4), c = …
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Evidence From High Ni Olivine For Diverse Primitive Magmas In Cascade Volcanism
<p>Minor element abundances in olivine phenocrysts from primitive, high-Mg# lavas (Mg/Mg+Fe >0.60) are used to explore the nature of magma genesis in the Cascade subduction system. Electron-microprobe analyses were obtained for olivine phenocrysts in primitive basalt from central Oregon and …
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The lattice preferred orientation of olivine in Beni Bousera Ultramafic Massif, Morocco
… Lattice preferred orientation (LPO) of olivine crystals from a sample transect across one of these zones was analyzed in comparison with LPO from the surrounding host lherzolite and harzburgite. The LPO from peridotites within the zone was slightly different from those outside the zone, …
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Indentation hardness and its relation to mechanical yield in quartz and olivine.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Earth and Planetary Science, 1978
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Experimental constraints on the rheological behavior of olivine at upper mantle conditions
… a detailed experimental study of the behavior of olivine at upper mantle conditions. Among the results is evidence of a significant pressure effect on the strength of olivine (an activation volume of 14 ± 3 cm3/mol), as well as pioneering in situ measurements of fabric development, slip system …
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Reduction and softening/melting behaviour of olivine pellet in the experimental blast furnace
… the reduction, softening and melting behavior of olivine based pellets in the experimental blast furnace. The aim of the project was to develop a fundamental understanding of the reduction mechanisms of olivine based pellets and to develop a correlation between the reduction rate and the softening …
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Martian meteorites as windows into planetary volcanism: insights from olivine-phyric shergottite meteorites
… investigation of two 1.1 Ma ejection-paired olivine-phyric shergottites, Northwest Africa (NWA) 2046 and NWA 4925. I show that Mg-rich olivine megacrysts in both samples represent phenocrysts and evidence of early olivine fractionation in staging chambers prior to ascent to surface. Distinct …
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The petrogenesis and geochemistry of the Namaqualand olivine melilitite pipe cluster, western South Africa
The Namaqualand olivine melilitite pipe cluster is a 40 km by 10 km north/south oriented area with at least 10 closely spaced alkaline ultramafic subvolcanic pipes and diatremes containing olivine melilitite and nephelinite, spanning an age range of 35-56 Ma. A related carbonatite complex …
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The geochemistry of the Olivine Melilitetes and related rocks of Namaqualand Bushmanland, South Africa
Early Tertiary olivine melilitites and associated non-diamondiferous kimberlites occur in two pipe clusters in the Namaqualand and Bushmanland regions of South Africa. The more northerly cluster is centred about the town of Gamoep and the second is located south of Garies. The olivine melilitites …
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Distribution of olivine and pyroxene in S-type asteroids throughout the inner main belt
… observed over this wavelength range are due to olivine and pyroxene, the two most abundant minerals in both chondritic and achondritic meteorites. The observed ratio of these two minerals is highly dependent on the amount of heating that an asteroid has undergone. The 1-micron band center …
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Water in the Earth’s Interior: Thermodynamics and kinetics of hydrogen incorporation in olivine and wadsleyite
(1) Hydrogen diffusion in olivine The kinetics of hydration of dry single crystals of San Carlos olivine was determined by performing experiments under water-saturated conditions. The experiments were performed at 1.5 GPa, 1000°C for 5 hours in a piston cylinder apparatus, or at 0.2 GPa, 900°C, for …
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Phase behavior and phase transformation kinetics during electrochemical cycling of lithium transition metal olivine compounds
Olivine LiMPO4 (M = Fe, Mn, Co, Ni) compounds have received most attention from the battery research community as the cathodes for Li-ion batteries because of several advantages, including a high theoretical capacity, 170 mAh/g, and flat discharge potential (with respect to Li/Li+) of 3.45 V, 4.1V, …
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The dependence on oxygen fugacity of nickel and cobalt partitioning between olivine and silicate melt
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1991.
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