Browsing Geological Sciences Theses and Dissertations by Author "Watkins, James"

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  • Carbon and Oxygen Isotope Fractionation in Laboratory-Precipitated, Inorganic Calcite 
    Baker, Evan (University of Oregon, 2015-08-18)
    Carbon and oxygen isotopes in calcite crystals provide a record of the environmental conditions under which the crystals formed. To investigate the influence of temperature, pH, and growth rate on isotope discrimination ...
  • Stable Isotope Systematics of Calcite 
    Olsen, Ellen (University of Oregon, 2024-01-09)
    The oxygen isotopic composition of calcite is widely used in paleoclimate studies to infer the temperatures of carbonate formation across a wide range of geologic environments including hydrothermal veins, caves, lakes, ...
  • Timing Vapor–Melt Equilibration in Silicic Magmas 
    Ball, Madison (University of Oregon, 2017-09-06)
    Magmas experiencing pressure changes can follow equilibrium or nonequilibrium degassing paths that determine the rate of gas exsolution and the composition of gases exsolved. Many variables influence timescales of equilibration ...

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