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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
Full Text:: : ______________________________________________________ Anita L. Grunder The Hampton Tuff is a 3.9 ± .02 Ma (2σ) ignimbrite sheet from the High

The Egan Range volcanic complex : implications for the evolution of a mid-tertiary synextensional volcanic system

Creator:: Feeley, Todd C.
Resource Type:: Masters Thesis

Geologic evolution of the Duck Creek Butte eruptive center, High Lava Plains, southeastern Oregon

Creator:: Johnson, Jenda A.
Resource Type:: Masters Thesis

Volcanology and petrology of Volcán Miño, Andean Central Volcanic Zone

Creator:: McKee, Claire M.
Abstract:: Volcán Miño (21°11'S) is located on the westernmost periphery of a longlived complex of stratovolcarioes and domes called the Aucanquilcha Complex. The Aucanquilcha Complex ranges in age from 11 Ma to 1-lolocene and lies along the main N-S trending axis of Quaternary volcanoes in the Andean Central Volcanic Zone (CVZ)....
Resource Type:: Masters Thesis
Full Text:: like to extend my gratitude to my main thesis advisor, Anita Grunder, who has acted as both my mentor

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:: Abstract approved: Anita L. Grunder Inheritance from pre-existing mantle domains and fluid and

Geology and petrology of a 26-Ma trachybasalt to peralkaline rhyolite suite exposed at Hart Mountain, southern Oregon

Creator:: Mathis, Allyson C.
Resource Type:: Masters Thesis

Partial melting of tonalite at the margins of a Columbia River Basalt Group dike, Wallowa Mountains, northeastern Oregon

Creator:: Petcovic, Heather L.
Abstract:: Columbia River Basalt Group dikes cut the tonalite-granodiorite Wallowa Batholith in northeastern Oregon, providing a natural setting in which to examine partial melting. Many dikes have up to 5 m-wide zones of quenched partially melted wallrock at their margins. This paper examines the progressive partial melting reactions in biotite-and hornblende-bearing...
Resource Type:: Masters Thesis
Full Text:: : Anita L. Grunder Columbia River Basalt Group dikes cut the tonalite-granodiorite Wallowa Batholith in

Dynamics of a long-lived magmatic system as indicated by variations in amphibole composition and textures in dacites erupted over 11 M.y. at the Aucanquilcha Volcanic Cluster, Central Andes, Chile

Creator:: Giles, Denise E. L.
Abstract:: The Aucanquilcha Volcanic Cluster (AVC) is the erupted part of a magmatic system with a complex and long-lived history. The AVC lies at 21°S in the high Andes and is built on thick continental crust. The thick crust in the area combined with the prolonged magmatic activity make it an...
Resource Type:: Masters Thesis

Geology and geochemistry of Juniper Ridge, Horsehead Mountain and Burns Butte : implications for the petrogenesis of silicic magma on the High Lava Plains, southeastern Oregon

Creator:: MacLean, James W.
Abstract:: The Juniper Ridge volcanic complex is located in the High Lava Plains Province of southeastern Oregon, a wide zone of bimodal volcanism and faulting that marks the northern limit of widespread Basin and Range-style faulting in the northern Great Basin Province. Rhyolite dome complexes are progressively younger to the northwest...
Resource Type:: Masters Thesis

Development of continental magmatic systems : insights from amphibole chemistry of the Altiplano Puna Volcanic Complex, Central Andes

Creator:: Abot, Manggon
Abstract:: The pressure history of a continental magmatic system can be deciphered by analyzing the composition of amphiboles in the eruptive products where the pressure of equilibration correlates with the depth of the magmatic system. This can reveal vertical evolution of the magma as amphibole composition varies significantly with temperature and...
Resource Type:: Masters Thesis
Full Text:: Anita L. Grunder The pressure history of a continental magmatic system can be deci- phered by

ScholarsArchive@OSU

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

The Egan Range volcanic complex : implications for the evolution of a mid-tertiary synextensional volcanic system

Geologic evolution of the Duck Creek Butte eruptive center, High Lava Plains, southeastern Oregon

Volcanology and petrology of Volcán Miño, Andean Central Volcanic Zone

Evolution and inheritance of Cascadia sub-arc mantle reservoirs

Geology and petrology of a 26-Ma trachybasalt to peralkaline rhyolite suite exposed at Hart Mountain, southern Oregon

Partial melting of tonalite at the margins of a Columbia River Basalt Group dike, Wallowa Mountains, northeastern Oregon

Dynamics of a long-lived magmatic system as indicated by variations in amphibole composition and textures in dacites erupted over 11 M.y. at the Aucanquilcha Volcanic Cluster, Central Andes, Chile

Geology and geochemistry of Juniper Ridge, Horsehead Mountain and Burns Butte : implications for the petrogenesis of silicic magma on the High Lava Plains, southeastern Oregon

Development of continental magmatic systems : insights from amphibole chemistry of the Altiplano Puna Volcanic Complex, Central Andes

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