Index Catalog // ScholarsArchive@OSU

Data report : major and trace element data for leg 202 sites 1233 and 1234

Creator:: McManus, James
Abstract:: The exchange of waters between the Pacific and the Southern Oceans occurs along the eastern boundary of the South Pacific. Because water masses of the Antarctic provide a connection among the world's ocean basins, these water masses maintain the ability to influence changes in ocean circulation and climate (Lynch-Stieglitz et...
Resource Type:: Article
Full Text:: Report: Major and Trace Element Data For Leg 202 Sites 1233 and 1234 James McManus INTRODUCTION

On the chemical and physical limnology of Crater Lake, Oregon

Creator:: McManus, James, 1963-
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF James McManus for the degree of

Germanium in mid-ocean ridge flank hydrothermal fluids

Creator:: Wheat, C. Geoffrey and McManus, James
Abstract:: We present concentrations of germanium and silicon in sediment pore waters, basaltic formation fluids, and bulk sediment from three ridge flank hydrothermal systems (RFHS). Basaltic formation fluids from warm (>30°C) RFHS have much higher Ge concentrations and Ge:Si molar ratios than overlying sediment pore waters, requiring seawater-basalt reactions to dominate...
Resource Type:: Article
Full Text:: , Moss Landing, California 95039, USA (wheat@mbari.org) James McManus College of Oceanic and Atmospheric

Sediment accumulation and human impacts in Tillamook Bay, Oregon

Creator:: Styllas, Michael N.
Abstract:: Tillamook Bay is the second largest estuary on the Oregon coast, and concerns have been raised whether human induced impacts have been responsible for the perceived increase in sedimentation rates during the past century. Major land-use practices within the five watersheds of the Bay include logging, forest fires, the construction...
Resource Type:: Masters Thesis
Full Text:: patterns. A brief review is provided of the study undertaken by Dr. James McManus for the collection

Mixing processes in Crater Lake, Oregon

Creator:: McManus, James, Collier, Robert W., and Dymond, Jack
Abstract:: Subsurface hydrothermal activity dominates the heat and salt budgets of the deep water column in Crater Lake, Oregon. From a time series of conductivity-temperature-depth data and data from a thermistor chain mooring, we estimate that the net hydrothermal heat flow is ~1 W m⁻² and the corresponding salt flux is...
Resource Type:: Article
Full Text:: Lake, Oregon JAMES MCMANUS, 1 ROBERT W. COLLIER, AND JACK DYMOND College of Oceanography, Oregon

Mapping, geochemical sampling and submersible observations of recent activity on the San Clemente fault zone : 27 March to 4 April 2000

Creator:: McManus, James, Goldfinger, Chris, and Torres, Marta E.
Abstract:: The investigation described in this project will test the hypothesis that fluxes of carbon, barium, manganese, iron and uranium associated with fluid seepage at the San Clemente fracture zone significantly affect the geochemical budgets for these elements, and ultimately result in anomalously high benthic fluxes throughout the San Clemente basin.
Resource Type:: Technical Report
Full Text:: James McManus and Chris Goldfinger MARILYN POTTS GUIN LIBRARY H. 11 ELD MARINE SCIENCE CENTER OR[r,0N

The manganese and iron shuttle in a modern euxinic basin and implications for molybdenum cycling at euxinic ocean margins

Creator:: Scholz, Florian, McManus, James, and Sommer, Stefan
Abstract:: A meaningful application of Mo as a paleo-redox proxy requires an understanding of Mo cycling in modern reducing environments. Stagnant euxinic basins such as the Black Sea are generally regarded as model systems for understanding euxinic systems during early Earth history. However, drawing direct parallels between the Black Sea and...
Resource Type:: Article
Full Text:: Florian Scholz*1, James McManus1 and Stefan Sommer2 3 1College of Earth, Ocean, and Atmospheric Sciences

Studies of hydrothermal processes in Crater Lake, OR

Creator:: Collier, Robert W., Dymond, Jack, and McManus, James
Abstract:: As a result of the past three years of field studies and our interpretation of these and other data from the literature, we conclude that there are inputs of hydrothermal fluids into the bottom of Crater Lake. The dissolved materials associated with these thermally and chemically enriched fluids, coupled with...
Resource Type:: Technical Report

Unbalanced particle flux budgets in Crater Lake, Oregon: Implications for edge effects and sediment focusing in lakes

Creator:: Dymond, Jack, Collier, Robert W., McManus, James, and Larson, Gary L.
Abstract:: Flux estimates show that upward mixing of the deep-water nitrate pool accounts for more than 85% of the total new nitrogen input to the euphotic zone of Crater Lake. Because measured primary productivity (360 mg C m-2 d-1) is 10–30 times higher than a level supported solely by the input...
Resource Type:: Article
Full Text:: DYMOND, JACK, ROBERT COLLIER, JAMES MCMANUS, AND GARY L

Molybdenum behavior during early diagenesis: Insights from Mo isotopes

Creator:: Poulson Brucker, Rebecca L., McManus, James, Severmann, Silke, and Berelson, William M.
Abstract:: We present molybdenum isotope and concentration data from 14 sites in the eastern Pacific from the central California to the Peru margin. The environments studied have been chosen to represent a broad range in oxidation-reduction (redox) potential, which provide a framework for the behavior of this redox-sensitive element. Manganese-rich hemipelagic...
Resource Type:: Article
Full Text:: : Insights from Mo isotopes Rebecca L. Poulson Brucker and James McManus College of Oceanic and Atmospheric

ScholarsArchive@OSU

Data report : major and trace element data for leg 202 sites 1233 and 1234

On the chemical and physical limnology of Crater Lake, Oregon

Germanium in mid-ocean ridge flank hydrothermal fluids

Sediment accumulation and human impacts in Tillamook Bay, Oregon

Mixing processes in Crater Lake, Oregon

Mapping, geochemical sampling and submersible observations of recent activity on the San Clemente fault zone : 27 March to 4 April 2000

The manganese and iron shuttle in a modern euxinic basin and implications for molybdenum cycling at euxinic ocean margins

Studies of hydrothermal processes in Crater Lake, OR

Unbalanced particle flux budgets in Crater Lake, Oregon: Implications for edge effects and sediment focusing in lakes

Molybdenum behavior during early diagenesis: Insights from Mo isotopes

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