Index Catalog // ScholarsArchive@OSU

Sediment size fractionation and focusing in the equatorial Pacific: Effect on ²³⁰Th normalization and paleoflux measurements

Creator:: Lyle, Mitchell, Marcantonio, Franco, Moore, Willard S., Murray, Richard W., Huh, Chih-An, Finney, Bruce P., Murray, David W., and Mix, Alan C.
Abstract:: We use flux, dissolution, and excess ²³⁰Th data from the Joint Global Ocean Flux Study and Manganese Nodule Project equatorial Pacific study Site C to assess the extent of sediment focusing in the equatorial Pacific. Measured mass accumulation rates (MAR) from sediment cores were compared to reconstructed MAR by multiplying...
Resource Type:: Article
Full Text:: size fractionation and focusing in the equatorial Pacific: Effect on 230Th normalization and paleoflux

Comment on "Do geochemical estimates of sediment focusing pass the sediment test in the equatorial Pacific?" by M. Lyle et al.

Creator:: Francois, Roger, Frank, Martin, Rutgers van der Loeff, Michiel, Bacon, Michael P., Geibert, Walter, Kienast, Stephanie, Anderson, Robert F., Bradtmiller, Louisa, Chase, Zanna, Henderson, Gideon, Marcantonio, Franco, and Allen, Susan E.
Abstract:: Accurately estimating the vertical flux of material reaching the seafloor from the overlying surface waters is essential for the paleoceanographic reconstruction of a wide variety of oceanic processes. Two approaches are currently being used. One consists of estimating mass accumulation rates (MAR) between dated horizons as the product of linear...
Resource Type:: Article
Full Text:: interpretation and contend that 230Th normalization grossly overestimates sediment focusing in the equatorial

The manganese-enriched sediments of the Blanco Trough : evidence for hydrothermal activity in a fracture zone

Creator:: Selk, Bruce W.
Abstract:: The Blanco Trough, a deep depression located in the Blanco Fracture Zone near the intersection with the Juan de Fuca Ridge, contains unusual manganese-enriched layered sediments. Due to the Blanco Trough's bathymetric isolation and confinement, and its location in a tectonically active zone, three hypotheses concerning the origin and cause...
Resource Type:: Masters Thesis
Full Text:: volcanic ash and is composed mainly of silt and clay size material, In relation to core 7Zll-4-FF2, the

Spatial and temporal variations in sediment accumulation in the central tropical Pacific

Creator:: Murray, David W. (David William), 1956-
Resource Type:: Dissertation
Full Text:: ........................... 1 CHAPTER I A HIGH RESOLUTION RECORD OF SEDIMENT ACCUMULATION IN THE CENTRAL EQUATORIAL PACIFIC

Climatically driven changes in oceanic processes throughout the equatorial Pacific

Creator:: Paytan, Adina, Lyle, Mitchell, Mix, Alan C., and Chase, Zanna
Abstract:: The mass accumulation rates of sedimentary components (carbonate, organic carbon, opal, barite, reactive phosphate, iron, terrigenous minerals, etc.) are used in many paleoceanographic reconstructions to learn about temporal and spatial changes in surficial Earth processes including wind stress and direction, oceanic circulation, weathering rates, marine productivity and ecosystem structure, climate...
Resource Type:: Article
Full Text:: reconstruction of paleoproductivity in the equatorial Pacific. We pose research questions and suggest possible

A review of nitrogen isotopic alteration in marine sediments

Creator:: Robinson, Rebecca S., Kienast, Markus, Albuquerque, Ana Luiza, Altabet, Mark, Contreras, Sergio, De Pol Holz, Ricardo, Dubois, Nathalie, Francois, Roger, Galbraith, Eric, Hsu, Ting-Chang, Ivanochko, Tara, Jaccard, Samuel, Kao, Shuh-Ji, Kiefer, Thorsten, Kienast, Stephanie, Lehmann, Moritz, Martinez, Philippe, McCarthy, Matthew, Mobius, Jurgen, Pedersen, Tom, Quan, Tracy M., Ryabenko, Evgeniya, Schmittner, Andreas, Schneider, Ralph, Schneider-Mor, Aya, Shigemitsu, Masahito, Sinclair, Dan, Somes, Christopher, Studer, Anja, Thunell, Robert, and Yang, Jin-Yu
Abstract:: Nitrogen isotopes are an important tool for evaluating past biogeochemical cycling from the paleoceanographic record. However, bulk sedimentary nitrogen isotope ratios, which can be determined routinely and at minimal cost, may be altered during burial and early sedimentary diagenesis, particularly outside of continental margin settings. The causes and detailed mechanisms...
Resource Type:: Article
Full Text:: ]. Based on a minor offset between d15N values in the fluff layer and the uppermost sediment sample of only

Near collapse of the meridional SST gradient in the eastern equatorial Pacific during Heinrich Stadial 1

Creator:: Kienast, Stephanie S., Friedrich, Tobias, Dubois, Nathalie, Hill, Paul S., Timmermann, Axel, Mix, Alan C., and Kienast, Markus
Abstract:: Sea surface temperatures (SST) and inorganic continental input over the last 25,000 years (25 ka) are reconstructed in the far eastern equatorial Pacific (EEP) based on three cores stretching from the equatorial front (~0.01°N, ME0005-24JC) into the cold tongue region (~3.6°S; TR163-31P and V19-30). We revisit previously published alkenone-derived SST...
Resource Type:: Article
Full Text:: ), Partitioning of eolian and hemipelagic sediment in eastern equatorial Pacific core TR163-31B and the late

Paleoclimate, paleoventilation, and paleomagnetism as recorded in a 17kyr marine sediment record from the SE Alaska margin

Creator:: Davies, Maureen Helen
Abstract:: The deglacial behavior of the sub-Arctic North Pacific is poorly constrained, with many published records suffering from limited age control due to extensive post- depositional biogenic carbonate dissolution. Potential alternative dating methods could include the correlation of stable-isotopic and/or paleomagnetic secular variation records to an independently-dated regional template, however no...
Resource Type:: Dissertation
Full Text:: . This may indicate convolved Northern and Southern drivers of climate variability in the North Pacific

The Global Overturning Circulation Since the Last Glacial Maximum Based on Marine Authigenic Neodymium Isotopes

Creator:: Du, Jianghui
Abstract:: The Global Overturning Circulation (GOC) is a major component of the global climate system. Understanding its behavior is pertinent to our prediction of climate change in the future. The lack of long-term observations of GOC in the modern instrumental era necessitates studies of GOC using paleoceanographic records. Of great interest...
Resource Type:: Dissertation
Full Text:: to the distributions of seawater and authigenic εNd in the Pacific Ocean. With the new method and

PattonJasonR2014.pdf

Creator:: Patton, Jason Robert
Abstract:: Subduction zone earthquake and tsunami hazards affect tens of millions worldwide and the recurrence of these disasters can be evaluated with paleoseismic techniques, because earthquake cycles (and their supercycles) typically span many millennia. In these three chapters, I discuss a suite of analyses I use to evaluate the sedimentary record...
Full Text:: deposi on for the turbidites in our cores. 4 I also inves gate sedimentological characteris cs and

ScholarsArchive@OSU

Sediment size fractionation and focusing in the equatorial Pacific: Effect on ²³⁰Th normalization and paleoflux measurements

Comment on "Do geochemical estimates of sediment focusing pass the sediment test in the equatorial Pacific?" by M. Lyle et al.

The manganese-enriched sediments of the Blanco Trough : evidence for hydrothermal activity in a fracture zone

Spatial and temporal variations in sediment accumulation in the central tropical Pacific

Climatically driven changes in oceanic processes throughout the equatorial Pacific

A review of nitrogen isotopic alteration in marine sediments

Near collapse of the meridional SST gradient in the eastern equatorial Pacific during Heinrich Stadial 1

Paleoclimate, paleoventilation, and paleomagnetism as recorded in a 17kyr marine sediment record from the SE Alaska margin

The Global Overturning Circulation Since the Last Glacial Maximum Based on Marine Authigenic Neodymium Isotopes

PattonJasonR2014.pdf

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