Index Catalog // ScholarsArchive@OSU

The Cerro Guacha caldera complex : an upper Miocene-Pliocene polycyclic volcano-tectonic structure in the Altiplano Puna Volcanic Complex of the Central Andes of Bolivia

Creator:: Iriarte, Rodrigo
Abstract:: Four multicyclic complex calderas and smaller ignimbrite shields located within the Altiplano Puna Volcanic Complex of the Central Andes (APVC) erupted 13000 km³ of magma within the last 11 Ma. One of the largest and most complex of these is the Cerro Guacha Caldera. Ar-Ar age determinations and paleomagnetic directions...
Resource Type:: Masters Thesis

Quantification of the temperature, pressure and compositional dependence of trace element partitioning : an experimental and theoretical study

Creator:: Cunningham, Jennifer Lynn
Abstract:: The thermodynamic history of the Earth is preserved in the trace element record created through igneous processes. The ability to interpret that record depends on the accuracy and precision of numerical models that connect igneous processes with their geochemical consequences. This project answers three major questions concerning the relationship between...
Resource Type:: Masters Thesis

Rhyolitic magmatism of the High Lava Plains and adjacent Northwest Basin and Range, Oregon : implications for the evolution of continental crust

Creator:: Ford, Mark T.
Abstract:: Understanding continental crust formation and modification is a fundamental and longstanding geologic problem. Influx of mantle-derived basaltic magma and partial melting of the crust are two ways to drive crustal differentiation. This process results in a low density upper crust and denser, more refractory lower crust, creating significant and vastly...
Resource Type:: Dissertation

Compositional variations in hydrothermal white mica and chlorite from wall-rock alteration at the Ann-Mason porphyry copper deposit, Nevada

Creator:: Cohen, Julia F.
Abstract:: The detection of subtle variations in mineral chemistry in zoned hydrothermal alteration associated with the formation of porphyry copper deposits by short-wave infrared spectroscopy and rock chemistry are potentially valuable vectoring tools for mineral exploration. In order to correctly interpret the data collected by these methods, results must be calibrated...
Resource Type:: Masters Thesis

Controls on eruption style and magma compositions at Mount Hood, Oregon

Creator:: Koleszar, Alison M.
Abstract:: This study is an effort to characterize the magma sources, plumbing system, and eruptive behavior of Mount Hood, a low-explosivity recharge-dominated volcano in the Oregon Cascades. The three manuscripts in this dissertation make use of melt inclusion data, phenocryst compositions, and whole rock petrology and geochemistry to build a schematic...
Resource Type:: Dissertation
Full Text:: Alison M. Koleszar for the degree of Doctor of Philosophy in Geology presented on July 21, 2011

The geochemical evolution of the Aucanquilcha Volcanic Cluster : prolonged magmatism and its crustal consequences

Creator:: Walker, Barry Alan, Jr.
Abstract:: The interaction of magma with continental crust at convergent margins is fundamental to understanding if and how continents grow. Isotopic and elemental data constrain the progressive stages of development of the magmatic underpinnings of the long-lived Aucanquilcha Volcanic Cluster (AVC), situated atop the thick continental crust of the central Andes...
Resource Type:: Dissertation

The use of surface energy balance models as a means to quantify changes in glacier mass balance : an application to the Collier Glacier

Creator:: Beedlow, Andrew Cody
Abstract:: This thesis presents the results of an investigation into the measured and modeled mass balance of the Collier Glacier, a small (0.70 km²), valley glacier located in the Oregon Cascade Range (44° 10' N, 121° 47' W). Here we present mass-balance measurements conducted for the 2009 and 2010 balance years...
Resource Type:: Masters Thesis
Full Text:: ABSTRACT OF THE THESIS OF Andrew Cody Beedlow for the degree of Master of Science in Geology

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
Full Text:: OF THE THESIS OF Sarah Ashley Bromley for the degree of Master of Science in Geology presented

Cycles of life and landscape : interpreting the geological foundation of Shenandoah National Park

Creator:: Kelly, Wendy Sonya
Abstract:: The significance of geology is commonly overlooked by the general public and underrepresented in free-choice learning environments including national parks that exhibit spectacular examples of geological features and processes. Parks are a major contributor to public learning, and a key way to teach how geology influences many aspects of our...
Resource Type:: Masters Thesis
Full Text:: ABSTRACT OF THE THESIS OF Wendy Sonya Kelly for the degree of Master of Science in Geology

Convergent margin magmatism in the central Andes and its near antipodes in western Indonesia : spatiotemporal and geochemical considerations

Creator:: Salisbury, Morgan J.
Abstract:: This dissertation combines volcanological research of three convergent continental margins. Chapters 1 and 5 are general introductions and conclusions, respectively. Chapter 2 examines the spatiotemporal development of the Altiplano-Puna volcanic complex in the Lípez region of southwest Bolivia, a locus of a major Neogene ignimbrite flare- up, yet the least...
Resource Type:: Dissertation
Full Text:: . Salisbury for the degree of Doctor of Philosophy in Geology presented on June 3, 2011. Title

ScholarsArchive@OSU

The Cerro Guacha caldera complex : an upper Miocene-Pliocene polycyclic volcano-tectonic structure in the Altiplano Puna Volcanic Complex of the Central Andes of Bolivia

Quantification of the temperature, pressure and compositional dependence of trace element partitioning : an experimental and theoretical study

Rhyolitic magmatism of the High Lava Plains and adjacent Northwest Basin and Range, Oregon : implications for the evolution of continental crust

Compositional variations in hydrothermal white mica and chlorite from wall-rock alteration at the Ann-Mason porphyry copper deposit, Nevada

Controls on eruption style and magma compositions at Mount Hood, Oregon

The geochemical evolution of the Aucanquilcha Volcanic Cluster : prolonged magmatism and its crustal consequences

The use of surface energy balance models as a means to quantify changes in glacier mass balance : an application to the Collier Glacier

Evolution and inheritance of Cascadia sub-arc mantle reservoirs

Cycles of life and landscape : interpreting the geological foundation of Shenandoah National Park

Convergent margin magmatism in the central Andes and its near antipodes in western Indonesia : spatiotemporal and geochemical considerations

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