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Filtering by: Creator Staudigel, H. Remove constraint Creator: Staudigel, H. Advisor Grunder, Anita L. Remove constraint Advisor: Grunder, Anita L.

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  • Biotic alteration of oceanic basalt glass

    Creator:
    Drinnan, Megan R.
    Abstract:
    The subsurface microbial biosphere in the igneous oceanic crust has implications for global geochemical cycling, early life on Earth, and the search for life on Mars. Microscopic evidence of a subsurface microbial ecosystem includes biotic alteration textures associated with basaltic glass. The exact conditions in the basaltic layer that make...
    Resource Type:
    Masters Thesis
    Full Text:
    ; Furnes et al., 2001a; Furnes et al., 2008; Furnes and Staudigel, 1999; Heberling et al., 2010; Josef

  • Evolution and inheritance of Cascadia sub-arc mantle reservoirs

    Creator:
    Bromley, Sarah Ashley
    Abstract:
    Inheritance from pre-existing mantle domains and fluid and melt contributions from active subduction together produce the geochemical signatures of mantle-derived arc basalts. In this context, this work evaluates the evolution of Cascadia mantle sources by documenting the isotopic and compositional characteristics of primitive basalts along a transect across the Eocene-Oligocene...
    Resource Type:
    Masters Thesis

  • The Hampton Tuff, High Lava Plains, Oregon : Implications for Westward Migrating Silicic Volcanism

    Creator:
    Sanville, Henri J.
    Abstract:
    The Hampton Tuff is a 3.9 ± .02 Ma (2σ) ignimbrite sheet from the High Lava Plains of central Oregon. The majority of known outcrops exist to the north, within ~22 mi (~35 km) of the Frederick Butte Volcanic Center, the proposed source of the tuff. Thickness of the tuff...
    Resource Type:
    Masters Thesis