Index Catalog // ScholarsArchive@OSU

Revisiting Lōʻihi: Geochemistry of Kamaʻehuakanaloa Lavas Reveals Complexities in the Pre-Shield to Shield Transition and Hawaiian Mantle Plume Source

Creator:: Truong, Thi B.
Abstract:: Studies of Hawaiian volcanoes contribute valuable insights about Earth processes and mantle evolution, and are fundamental for understanding the construction of the largest volcanoes on terrestrial planets. The pre-shield stage exists in every Hawaiian volcano, but is usually blanketed by high volume tholeiitic lava flows during the main shield stage....
Resource Type:: Dissertation
Full Text:: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 B Chapter 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196 C Chapter

Petrogenesis of the Steens Basalt : Variation in Source Contributions and Effects of Crustal Passage During the Onset of Columbia River Flood Basalt Volcanism

Creator:: Moore, Nicole E.
Abstract:: Continental flood basalts represent short-lived but immense blasts of mafic magma to the continental crust. The youngest and smallest continental flood basalt worldwide, the Columbia River Basalt, initiated with the eruption of the most mafic member, the Steens Basalt (~16.9 Ma). The Steens Basalt is exposed in southeast Oregon, southwest...
Resource Type:: Dataset and Dissertation
Full Text:: record a three-stage history: the lower A, lower B, and upper Steens Basalt stages. The lower A stage

Subglacial hydrology of the Lake Michigan Lobe, Laurentide Ice Sheet

Creator:: Breemer, Christopher W.
Abstract:: Fast ice flow and unstable ice sheet behavior were characteristic features of the Lake Michigan Lobe of the southern Laurentide Ice Sheet. Such behavior may result from some combination of subglacial-sediment deformation and decoupled sliding at the ice-bed interface. Both mechanisms depend on high water pressure relative to ice pressure....
Resource Type:: Masters Thesis
Full Text:: as underlying Ice Stream B, West Antarctic Ice Sheet, would transmit sufficient water to prevent

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:: hypotheses. B. Steinberger ran and provided the plume motion model runs. V. Finlayson provided the 206Pb

The Geology and Geochemistry of the Haquira East Porphyry Copper Deposit of Southern Peru : Insights on the Timing, Temperature and Lifespan of the Magmatic-hydrothermal Alteration and Mineralization

Creator:: Cernuschi Rodilosso, Federico
Abstract:: This dissertation is informally divided into three major sections. In the first section (Chapter 2) I use data from field mapping, isotopic geochronology, whole rock geochemistry and trace element concentrations in zircons to examine the petrology, geochemistry and ages of the Haquira East porphyry copper deposit of southern Peru. In...
Resource Type:: Dissertation
Full Text:: Cernuschi-PhD-Thesis-12-21-2015-B&W

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:: ..................................................................................... 129 B Phenocryst Compositions from Electron Microprobe (EMP) Analysis ................ 166 C

An Evaluation of the Complex Age Progression along the Cook-Austral Islands Using High-resolution ⁴⁰Ar/³⁹Ar Incremental Heating Ages

Creator:: Rose, Joanna
Abstract:: The Cook-Austral island chain has been the center of debate for many years. Contrary to the classical hotspot hypothesis, this volcanic island chain does not exhibit a linear age progression with a single node of active volcanism, but instead shows evidence of young volcanism at several points along the chain....
Resource Type:: Masters Thesis
Full Text:: ................................................................................... 85 Appendix B. Sample and Age Information

Kinematics of the Columbia Hills Anticline and the Warwick Strike-Slip Fault, Yakima Fold and Thrust Belt, Washington, USA

Creator:: Woodring, Danielle N.
Abstract:: Discrete fault systems accommodate both N-S contraction and dextral shear in concert with clockwise rotational deformation of the North American plate above the Cascadia Subduction Zone. In Washington, the Yakima Fold and Thrust Belt (YFTB) accommodates N-S contraction as a series of ENE-WSW trending thrust faults and folds. NW-striking, predominantly...
Resource Type:: Masters Thesis
Full Text:: -section A-A’.......................................33 4.4.2 East of the WFZ: Cross-section B-B

Characterizing Yakima Fold and Thrust Belt structures that cross the Cascade Range at the latitude of the Columbia River

Creator:: Gordon, Gabriel
Abstract:: In eastern Washington and western Oregon, southwest-northeast striking thrust faults and folds of the Yakima Fold and Thrust Belt (YFTB) and northwest-striking dextral strike-slip faults accommodate north-south contraction resulting from clockwise rotation of the North American Plate. Though present to the east and west of the Cascade Range, the connectivity...
Resource Type:: Masters Thesis
Full Text:: .…………………………………………………………...19 4.2.1 A-A’……………………………………………………………19 4.2.2 B-B’…………………………………………………………….21 4.3

Tracer experiments in a non-uniform porous medium : implications of diffusive mass transfer on the late-time breakthrough behavior

Creator:: Freiherr von Schwerin, Claudius
Abstract:: Mass transfer processes were evaluated in an artificial, non-uniform porous medium with a power law distribution of diffusion rate coefficients obtained from physical characterization of solute and porous medium. Breakthrough curves of several pulse experiments conducted at different velocities were compared (1) to analytical expressions for concentrations at mass transfer...
Resource Type:: Masters Thesis
Full Text:: ......................................................................... 70 APPENDIX B: CALIBRATION PROCEDURES .................................................. 71

ScholarsArchive@OSU

Revisiting Lōʻihi: Geochemistry of Kamaʻehuakanaloa Lavas Reveals Complexities in the Pre-Shield to Shield Transition and Hawaiian Mantle Plume Source

Petrogenesis of the Steens Basalt : Variation in Source Contributions and Effects of Crustal Passage During the Onset of Columbia River Flood Basalt Volcanism

Subglacial hydrology of the Lake Michigan Lobe, Laurentide Ice Sheet

New Insights into Mantle Dynamics from Helium Isotopes and Argon Geochronology

The Geology and Geochemistry of the Haquira East Porphyry Copper Deposit of Southern Peru : Insights on the Timing, Temperature and Lifespan of the Magmatic-hydrothermal Alteration and Mineralization

Evolution and inheritance of Cascadia sub-arc mantle reservoirs

An Evaluation of the Complex Age Progression along the Cook-Austral Islands Using High-resolution ⁴⁰Ar/³⁹Ar Incremental Heating Ages

Kinematics of the Columbia Hills Anticline and the Warwick Strike-Slip Fault, Yakima Fold and Thrust Belt, Washington, USA

Characterizing Yakima Fold and Thrust Belt structures that cross the Cascade Range at the latitude of the Columbia River

Tracer experiments in a non-uniform porous medium : implications of diffusive mass transfer on the late-time breakthrough behavior

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