Index Catalog // ScholarsArchive@OSU

The influence of early diagenesis on trace element and molybdenum isotope geochemistry

Creator:: Poulson, Rebecca L.
Abstract:: This thesis investigates the influence of early diagenesis on trace metal and molybdenum isotope behavior in marine and lacustrine environments. Chapter one is a synthesis of previous research in all the marine environments investigated, providing an essential geochemical context for interpreting the observed behavior of Mo in these settings. Chapter...
Resource Type:: Dissertation
Full Text:: James McManus This thesis investigates the influence of early diagenesis on trace metal and

Glacial to holocene watermass and continental weathering reconstructions from the Southeast Pacific

Creator:: Muratli, Jesse M.
Abstract:: Sediments of the central Chile margin record changes in ocean circulation and continental erosion associated with large–scale climate change. Here Antarctic– influenced Southern Ocean currents flow equatorward, forming a link between the high– and low–latitude oceans. Part of this link, Antarctic Intermediate Water, is an important conduit that ventilates South...
Resource Type:: Masters Thesis
Full Text:: the Southeast Pacific Abstract approved: James McManus Zanna

Influence of a Sedimentary Source of Nd on Deep Ocean εNd Distributions

Creator:: Abbott, April N.
Abstract:: Ocean circulation is an important component in Earth's climate system. Predicting future climate and circulation changes requires an improved understanding of the past relationship between climate and ocean currents. The neodymium isotope composition (εNd) of water masses is frequently used as a quasi-conservative tracer to reconstruct ocean circulation. The current...
Resource Type:: Dissertation

Contribution of cold seep barite to the barium geochemical budget of a marginal basin

Creator:: McQuay, Erica L.
Abstract:: Large barite (BaSO4) structures mark cold seeps in the southern San Clemente Basin. Barium flux to San Clemente sediments is two to three times greater than fluxes measured in surrounding California Borderland basins. Analyses of sediment trap material, water column samples, sediments and pore water indicate that expected bariumbearing mineral...
Resource Type:: Masters Thesis
Full Text:: McShane, who helped with sample processing. In addition to serving on my committee, Jim McManus

Permanent Moorages and Temporary Tie-Up Facilities in the Portland/Vancouver Metropolitan Area: Meeting the Needs of the Larger Recreational Boat

Creator:: McManus, John F.
Abstract:: This study is composed of two parts. Section I deals with developed moorages and marinas--where they are; what services are offered in each, and how well the existing supply of permanent moorages serves the boating public. Section II examines the need for temporary 'harbors of refuge' in the area, what...
Resource Type:: Capstone Project
Full Text:: Area: Meeting the Needs of the Larger' Recreational Boat by John F. McManus Internship Report

Understanding Molybdenum Isotope Dynamics in Terrestrial Environments

Creator:: King, Elizabeth K.
Abstract:: This dissertation works towards determining the mechanisms driving the Mo isotopic composition of soils, and how these signals may be used to refine the use of Mo as a proxy of biogeochemical processes. The first step towards quantifying Mo fractionation in soils is to determine the mechanisms controlling Mo accumulation,...
Resource Type:: Dissertation
Full Text:: defined by three sinks (McManus et al., 2006). Under oxic conditions, the removal of Mo from the

Utilization of natural and supplemental biofuels for harvesting energy from marine sediments

Creator:: Nielsen, Mark E.
Abstract:: A benthic microbial fuel cell (BMFC) is an electrochemical device that generates current from the redox gradient at the sediment-water interface. Early prototypes had anodes buried in anoxic sediments and cathodes in overlying water. The BMFCs described in this dissertation are based on a chamber design that enables the use...
Resource Type:: Dissertation
Full Text:: and Hong Liu provided helpful reviews of my manuscripts while Jim McManus and Jack Istok provided

Simulating past, present, and future changes in ENSO : a model evaluation and data-model comparison

Creator:: Alder, Jay R.
Abstract:: This thesis presents the results of a formal evaluation of a new AOGCM, GENMOM, demonstrating its ability to simulate present-day climate and ENSO dynamics. The model is applied to simulate climate for the Last Glacial Maximum, deglacial, and Holocene time periods. The model output is evaluated against the best available...
Resource Type:: Dissertation
Full Text:: Brook for joining my committee on such short notice and Jim McManus for serving as my GCR. Though

Barium cycling in the North Pacific: Implications for the utility of Ba as a paleoproductivity and paleoalkalinity proxy

Creator:: McManus, James, Berelson, William M., Hammond, Douglas E., and Klinkhammer, Gary P.
Abstract:: Benthic incubation chambers have been deployed in a variety of geochemical environments that provide a comprehensive geochemical framework from which to address issues related to Ba geochemistry and the use of Ba as a paleoproxy. First order budgets for barium show that in the equatorial Pacific, present rates of Ba...
Resource Type:: Article
Full Text:: palcoproductivity and palcoalkalinity proxy James McManus • College of Oceanic and Atmospheric Sciences, Oregon

Oceanic phosphorus imbalance : magnitude of the mid-ocean ridge flank hydrothermal sink

Creator:: Wheat, C. Geoffrey, McManus, James, Mottl, Michael J., and Giambalvo, Emily
Abstract:: We present a new estimate for the crustal phosphorous sink that results from reactions among seawater, basalt, and sediment blanketing low temperature mid-ocean ridge flank hydrothermal systems. New estimates for global hydrothermal power output, sediment thickness, and the dissolved phosphate concentrations in basement formation fluids indicate that fluid flow through...
Resource Type:: Article
Full Text:: -ocean ridge flank hydrothermal sink C. Geoffrey Wheat,1 James McManus,2 Michael J. Mottl,3 and Emily

ScholarsArchive@OSU

The influence of early diagenesis on trace element and molybdenum isotope geochemistry

Glacial to holocene watermass and continental weathering reconstructions from the Southeast Pacific

Influence of a Sedimentary Source of Nd on Deep Ocean εNd Distributions

Contribution of cold seep barite to the barium geochemical budget of a marginal basin

Permanent Moorages and Temporary Tie-Up Facilities in the Portland/Vancouver Metropolitan Area: Meeting the Needs of the Larger Recreational Boat

Understanding Molybdenum Isotope Dynamics in Terrestrial Environments

Utilization of natural and supplemental biofuels for harvesting energy from marine sediments

Simulating past, present, and future changes in ENSO : a model evaluation and data-model comparison

Barium cycling in the North Pacific: Implications for the utility of Ba as a paleoproductivity and paleoalkalinity proxy

Oceanic phosphorus imbalance : magnitude of the mid-ocean ridge flank hydrothermal sink

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