Index Catalog // ScholarsArchive@OSU

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

A petrochemical study of the Mount Fubilan Intrusion and associated ore bodies, Papua New Guinea

Creator:: Doucette, John
Abstract:: The Mount Fubilan Intrusion is part of a geologically young hypabyssal stock in the Star Mountains of Papua New Guinea. This stock was mapped as the Ok Tedi Intrusive Complex and divided into four separate bodies: the Mount Fubilan, Sydney Intrusion, Kalgoorlie, and Ningi Intrusions. Hydrothermal fluids caused alteration of...
Resource Type:: Dissertation

The genesis of the San Vicente lead zinc rhythmite deposit, Peru : a petrologic, geochemical, and sulfur isotope study

Creator:: Schütfort, Erwin G.
Abstract:: The San Vicente zinc lead deposit is located in the Eastern Andes of Central Peru. The deposit is an epigenetic Mississippi Valley-type deposit based on stratigraphic, geologic, petrographic, and geochemical evidence. The dolomite host rocks of the Pucara Group are of Triassic-Jurassic age. The source of metals are red sandstones...
Resource Type:: Masters Thesis
Full Text:: , scientific inquiry, and geologic writing. My committee members John Dilles, Roger Nielsen, and Jack

Determination of marine migratory behavior and its relationship to selected physical traits for least cisco (Coregonus sardinella) of the western Arctic coastal plain, Alaska

Creator:: Seigle, John C.
Abstract:: With increased resource development on the western Arctic coastal plain of Alaska (especially within the oil extraction industry) it is important to understand the basic life history attributes of whitefish stocks in the region in order to ensure appropriate management. These fish are a crucial part of subsistence harvests for...
Resource Type:: Masters Thesis
Full Text:: science. I am indebted to Roger Nielsen for his guidance in the use of electron microprobe technology

Development of a progeny marker for steelhead

Creator:: Shippentower, Gene E.
Abstract:: This study was undertaken to determine if strontium chloride could be used to create a trans-generational otolith mark in steelhead (Oncorhynchus mykiss). I completed two strontium injection trials and a survey of juvenile steelhead from various steelhead hatcheries. The two trials measured Sr:Ca ratios in otoliths in response to injections...
Resource Type:: Masters Thesis
Full Text:: . Douglas Markle and Dr. Roger Nielsen for providing assistance during my graduate work. I would like

Roles of gas and solid components in the direct nitridation of silicon

Creator:: Pavarajarn, Varong
Abstract:: The factors influencing the direct nitridation of silicon, including the effects of the native oxide layer covering the surface of silicon, the effects of hydrogen contained in the nitridation gas and the catalytic effects of metals added to the raw material silicon, were investigated, using a tubular flow reactor and...
Resource Type:: Dissertation
Full Text:: . Keith Levien, Dr. Roger Nielsen and Dr. Brian Wood for their valuable time and suggestions. I would

Ecological relation of sympatric steelhead and resident rainbow trout in the Deschutes River, Oregon

Creator:: Zimmerman, Christian E.
Abstract:: Sympatric steelhead and resident rainbow trout (Oncorhynchus mykiss) are known to exist in many rivers throughout the Pacific Rim. Whether sympatric steelhead and resident rainbow trout are polymorphisms within a single gene pool or two reproductively isolated populations has significant implications concerning the study and conservation of this polytypic species....
Resource Type:: Dissertation
Full Text:: this dissertation. Gordon Reeves, Hiram Li, Doug Markie, Mark Hixon, and Roger Nielsen served as a

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

Deep crustal and mantle inputs to North Sister Volcano, Oregon High Cascade Range

Creator:: Schmidt, Mariek E.
Abstract:: The Central Oregon High Cascade Range is an anomalously mafic segment of the Cascade Arc due to ongoing intra-arc extension, which allows most magmas to traverse the crust without stalling and evolving to more evolved compositions. North Sister, a composite volcano in this arc segment, has produced a seemingly monotonous...
Resource Type:: Dissertation

Stable isotope investigation of a hydrothermal alteration system : Butte porphyry copper deposit

Creator:: Zhang, Lihua, 1965-
Abstract:: Typical porphyry-type Cu-Mo mineralization predates and underlies the well-known Main Stage polymetallic veins of the Butte district, Montana. This thesis presents the first systematic study of the isotopic characteristics of the pre-Main Stage K-silicate and sericitic wallrock alteration related to the porphyry Cu-Mo stage. Oxygen and hydrogen isotopic compositions were...
Resource Type:: Dissertation

ScholarsArchive@OSU

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

A petrochemical study of the Mount Fubilan Intrusion and associated ore bodies, Papua New Guinea

The genesis of the San Vicente lead zinc rhythmite deposit, Peru : a petrologic, geochemical, and sulfur isotope study

Determination of marine migratory behavior and its relationship to selected physical traits for least cisco (Coregonus sardinella) of the western Arctic coastal plain, Alaska

Development of a progeny marker for steelhead

Roles of gas and solid components in the direct nitridation of silicon

Ecological relation of sympatric steelhead and resident rainbow trout in the Deschutes River, 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

Deep crustal and mantle inputs to North Sister Volcano, Oregon High Cascade Range

Stable isotope investigation of a hydrothermal alteration system : Butte porphyry copper deposit

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