Index Catalog // ScholarsArchive@OSU

A Geochemical Model for the Petrogenesis of the Curaçao Lava Formation: Implications for the Origin of the Caribbean Plateau

Creator:: Krawl, Kyle A.
Abstract:: The Curaçao Lava Formation (CLF) records the magmatic and tectonic processes that formed the Caribbean Large Igneous Province (CLIP). A model of the petrogenesis of the CLF was developed using new geochemical and geochronological data. These data include major element compositions obtained using X-ray fluorescence spectroscopy (XRF), trace element concentrations...
Resource Type:: Honors College Thesis
Full Text:: Fifty-six samples collected from the CLF by R. A. Duncan and M. Loewen form the basis of this research

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

The "tops" of porphyry copper deposits - mineralization and plutonism in the Western Cascades, Oregon

Creator:: Power, Sara Glen
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Sara G. Power for the degree of

Early Oligocene intrusions in the central Coast Range of Oregon : petrography, geochemistry, geochronology and implications for the Tertiary magmatic evolution of the Cascadia forearc

Creator:: Oxford, Jeremiah
Abstract:: The Early Oligocene Oregon Coast Range Intrusions (OCRI) consist of gabbroic rocks and lesser alkalic intrusive bodies that were emplaced in marine sedimentary units and volcanic sequences within a Tertiary Cascadia forearc basin. The alkalic intrusions include nepheline syenite, camptonite, and alkaline basalt. The gabbros occur as dikes and differentiated...
Resource Type:: Masters Thesis
Full Text:: Duncan for his contribution to the geochronology work and for lending use of his laboratory; to Roger

The Deschutes Formation: evidence of extension-enhanced explosivity in the early High Cascades

Creator:: Pitcher, Bradley W.
Abstract:: The eruptive history of the Quaternary Cascades arc has been relatively well characterized. However, much less is known about the frequency and sizes of explosive eruptions produced by earlier stages of the arc. The Late Neogene Deschutes Formation of Central Oregon preserves a remarkable record of heightened pyroclastic activity during...
Resource Type:: Dissertation
Full Text:: also want to express tremendous thanks to Anita Grunder and Bob Duncan, who are Co-PIs on the

The First Spatiotemporal Estimation of Future Vent Opening at Harrat Khaybar, Saudi Arabia

Creator:: Alohali, Abdullah W.
Abstract:: The 180,000 km² of Arabian lava fields (“harrats” in Arabic) form one of the largest distributed basaltic provinces in the world. Approximately 50% of these are located in Saudi Arabia. The most recent eruption in 1256 AD, as well as seismicity and ground deformation associated with shallow dike emplacement in...
Resource Type:: Masters Thesis
Full Text:: MatHaz program, Drs. Robert Duncan and Shane Cronin for providing the new age data from Harrat Khaybar

New Insights into Mantle Dynamics from Helium Isotopes and Argon Geochronology

Creator:: Konrad, Kevin
Abstract:: Earth’s mantle extends to nearly 3000 km depth, comprises >80 % of Earth’s total volume, and has the largest influence on the primordial and radiogenic heat budget. Despite its importance, the structure and composition of the mantle is still debated. There are three primary models for Earth’s mantle structure that...
Resource Type:: Dissertation
Full Text:: Society of America Special Papers, v. 514, p. 51-63. 15 Duncan, R. A., and Clague, D. A., 1985

Timescales and tectonics of oceanic plateaus : long-term evolution of Ontong Java Nui and Rio Grande Rise

Creator:: Davidson, Peter C.
Abstract:: Oceanic plateaus are regions of overthickened oceanic crust and are often thought to form from the interaction of mantle plumes with oceanic lithosphere. These regions can cover vast areas of the ocean basins and represent a highly elevated magmatic flux relative to normal mid-ocean ridge spreading. Oceanic plateaus are considered...
Resource Type:: Dissertation
Full Text:: past years, especially Bob Duncan who provided fruitful discussion and help with several projects. I

Analysis of semi-volatile trace metals in basaltic glass by LA-ICP-MS

Creator:: Loewen, Matthew W.
Abstract:: Semi-volatile trace metals (e.g., Cd, Sn, Pb, Zn, Cu, Mo) have been analyzed by using laser ablation ICP-MS in a number of silicate glasses (GSE-1G, GSD-1G, NIST 610, NIST 612, BCR-2G, BHVO-2G). Our work investigates and highlights sources of uncertainty in the analysis of semi-volatile metals using LA-ICP-MS. We identify...
Resource Type:: Masters Thesis
Full Text:: to thank my thesis committee members John Dilles and Robert Duncan for valuable conversation and

Reactive transport modeling in a discrete fracture : applications to the formation of sericitic hydrothermal alteration at Butte, Montana

Creator:: Geiger, Sebastian
Abstract:: A model for the spatial and temporal evolution of the gray sericitic (GS) and sericite with remnant biotite (SBr) hydrothermal alteration selvages within the Butte Quartz Monzonite (BQM) of the porphyry copper deposit at Butte, Montana, is presented. The model provides a mathematical description for the location and advance of...
Resource Type:: Masters Thesis
Full Text:: Robert Duncan. Roy, John, and Mark are not only great geologists who came up with this very exciting

ScholarsArchive@OSU

A Geochemical Model for the Petrogenesis of the Curaçao Lava Formation: Implications for the Origin of the Caribbean Plateau

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

The "tops" of porphyry copper deposits - mineralization and plutonism in the Western Cascades, Oregon

Early Oligocene intrusions in the central Coast Range of Oregon : petrography, geochemistry, geochronology and implications for the Tertiary magmatic evolution of the Cascadia forearc

The Deschutes Formation: evidence of extension-enhanced explosivity in the early High Cascades

The First Spatiotemporal Estimation of Future Vent Opening at Harrat Khaybar, Saudi Arabia

New Insights into Mantle Dynamics from Helium Isotopes and Argon Geochronology

Timescales and tectonics of oceanic plateaus : long-term evolution of Ontong Java Nui and Rio Grande Rise

Analysis of semi-volatile trace metals in basaltic glass by LA-ICP-MS

Reactive transport modeling in a discrete fracture : applications to the formation of sericitic hydrothermal alteration at Butte, Montana

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