Index Catalog // ScholarsArchive@OSU

Nano-scale investigation of the association of microbial nitrogen residues with iron (hydr)oxides in a forest soil O-horizon

Creator:: Keiluweit, Marco, Bougoure, Jeremy J., Zeglin, Lydia H., Myrold, David D., Weber, Peter K., Pett-Ridge, Jennifer, Kleber, Markus, and Nico, Peter S.
Abstract:: Amino sugars in fungal cell walls (such as chitin) represent an important source of nitrogen (N) in many forest soil ecosystems. Despite the importance of this material in soil nitrogen cycling, comparatively little is known about abiotic and biotic controls on and the timescale of its turnover. Part of the...
Resource Type:: Article
Full Text:: wall components. 214 M. Keiluweit et al. /Geochimica et Cosmochimica Acta 95 (2012) 213–226 In

The sedimentary flux of dissolved rare earth elements to the ocean

Creator:: Abbott, April N., Haley, Brian A., McManus, James, and Reimers, Clare E.
Abstract:: We determined pore fluid rare earth element (REE) concentrations in near-surface sediments retrieved from the continental margin off Oregon and California (USA). These sites represent shelf-to-slope settings, which lie above, within, and below the oxygen minimum zone of the Northeast Pacific. The sediments are characterized by varying degrees of net...
Resource Type:: Article
Full Text:: budgets 36 (Arsouze et al., 2009). Pore fluid normalized REE patterns show distinct variation in the 37

Sources and input mechanisms of hafnium and neodymium in surface waters of the Atlantic sector of the Southern Ocean

Creator:: Stichel, Torben, Frank, Martin, Rickli, Jorg, Hathorne, Ed C., Haley, Brian A., Jeandel, Catherine, and Pradoux, Catherine
Abstract:: Radiogenic isotopes of hafnium (Hf) and neodymium (Nd) are powerful tracers for water mass transport and trace metal cycling in the present and past oceans. However, due to the scarcity of available data the processes governing their distribution are not well understood. Here we present the first combined dissolved Hf...
Resource Type:: Article
Full Text:: Available online at www.sciencedirect.com www.elsevier.com/locate/gca Geochimica et Cosmochimica Acta 94

Re and Os isotopes of the central Oregon Cascades and along the arc indicate variable homogenization and mafic growth in the deep crust

Creator:: Schmidt, Mariek E., Grunder, Anita L., Rowe, Michael C., and Chesley, John T.
Abstract:: The rhenium-osmium isotopic system has the potential to track the maturation of arc crust at lower crustal levels because the ¹⁸⁷Os/¹⁸⁸Os in magmas is sensitive to the age and composition of crust with which they interact. We here present Re and Os isotopic data for a suite of samples from...
Resource Type:: Article
Full Text:: online at www.sciencedirect.com www.elsevier.com/locate/gca Geochimica et Cosmochimica Acta 109 (2013

The effect of diagenesis and fluid migration on rare earth element distribution in pore fluids of the northern Cascadia accretionary margin

Creator:: Kim, Ji-Hoon, Torres, Marta E., Haley, Brian A., Kastner, Miriam, Pohlman, John W., Riedel, Michael, and Lee, Young-Joo
Abstract:: Analytical challenges in obtaining high quality measurements of rare earth elements (REEs) from small pore fluid volumes have limited the application of REEs as deep fluid geochemical tracers. Using a recently developed analytical technique, we analyzed REEs from pore fluids collected from Sites U1325 and U1329, drilled on the northern...
Resource Type:: Article
Full Text:: -lattices: species and site dependencies. Geochimica et Cosmochimica Acta 68, 2265–2273. doi:10.1016/J.GCA

A GCxGC-ToFMS Investigation of the Unresolved Complex Mixture and Associated Biomarkers in Biodegraded Petroleum

Creator:: Wang Guangli, Simoneit, Bernd Rolf Tatsuo, Shi Shengbao, Wang Tieguan, Zhong Ningning, and Wang Peirong
Abstract:: Heavy biodegraded crude oils have larger numbers of coeluting compounds than non- biodegraded oils, and they are typically not resolved with conventional gas chromatography (GC). This unresolved complex mixture (UCM) has been investigated using comprehensive two- dimensional gas chromatography-time-of-flight mass spectrometry (GCxGC-ToFMS) within a set of biodegraded petroleums derived from...
Resource Type:: Article
Full Text:: . Geochimica et Cosmochimica Acta, 35(7): 661–678. Alexander, R., Kagi, R., and Noble, R., 1983

Bottoms up: Sedimentary control of the deep North Pacific Ocean’s ε[subscript Nd] signature

Creator:: Abbott, April N., Haley, Brian A., and McManus, James
Abstract:: The ability to reconstruct past ocean currents is essential for determining ocean circulation’s role in global heat transport and climate change. Our understanding of the relationship between circulation and climate in the past allows us to predict the impact of future climate-driven circulation changes. One proposed tracer of past ocean...
Resource Type:: Article
Full Text:: : Geochimica et Cosmochimica Acta, 220 v. 154, p. 186–200, doi:10.1016/j.gca.2015.01.010. 221 Akagi, T

¹⁴C and ¹³C characteristics of higher plant biomarkers in Washington margin surface sediments

Creator:: Feng, Xiaojuan, Benitez-Nelson, Bryan C., Montlucon, Daniel B., Prahl, Fredrick G., McNichol, Ann P., Xu, Li, Repeta, Daniel J., and Eglinton, Timothy I.
Abstract:: Plant wax lipids and lignin phenols are the two most common classes of molecular markers that are used to trace vascular plant-derived OM in the marine environment. However, their ¹³C and ¹⁴C compositions have not been directly compared, which can be used to constrain the flux and attenuation of terrestrial...
Resource Type:: Article
Full Text:: www.sciencedirect.com www.elsevier.com/locate/gca Geochimica et Cosmochimica Acta 105 (2013) 14–30 14C and 13C

Magma transport and olivine crystallization depths in Kīlauea's east rift zone inferred from experimentally rehomogenized melt inclusions

Creator:: Tuohy, Robin M., Wallace, Paul J., Loewen, Matthew W., Swanson, Donald A., and Kent, Adam J. R.
Abstract:: Concentrations of H₂O and CO₂ in olivine-hosted melt inclusions can be used to estimate crystallization depths for the olivine host. However, the original dissolved CO₂ concentration of melt inclusions at the time of trapping can be difficult to measure directly because in many cases substantial CO₂ is transferred to shrinkage...
Resource Type:: Article
Full Text:: . /Geochimica et Cosmochimica Acta 185 (2016) 232–250 233 to investigate a variety of problems, from shallow mag

Carbonates dissolution and precipitation in hemipelagic sediments overlaid by supersaturated bottom-waters - Gulf of Aqaba, Red Sea

Creator:: Steiner, Zvi, Lazar, Boaz, Reimers, Clare E., and Erez, Jonathan
Abstract:: Whether CaCO₃ dissolves within the top centimeters of marine sediments overlaid by deep, supersaturated bottom waters remains an area of debate in geochemistry. This uncertainty stems from the fact that different methods used to assess CaCO₃ dissolution rates often provide what appear to be profoundly different results. Here we combine...
Resource Type:: Article
Full Text:: the top sediment effectively buffers most of the decrease in pH (Archer et al., 1989). Fig

ScholarsArchive@OSU

Nano-scale investigation of the association of microbial nitrogen residues with iron (hydr)oxides in a forest soil O-horizon

The sedimentary flux of dissolved rare earth elements to the ocean

Sources and input mechanisms of hafnium and neodymium in surface waters of the Atlantic sector of the Southern Ocean

Re and Os isotopes of the central Oregon Cascades and along the arc indicate variable homogenization and mafic growth in the deep crust

The effect of diagenesis and fluid migration on rare earth element distribution in pore fluids of the northern Cascadia accretionary margin

A GCxGC-ToFMS Investigation of the Unresolved Complex Mixture and Associated Biomarkers in Biodegraded Petroleum

Bottoms up: Sedimentary control of the deep North Pacific Ocean’s ε[subscript Nd] signature

¹⁴C and ¹³C characteristics of higher plant biomarkers in Washington margin surface sediments

Magma transport and olivine crystallization depths in Kīlauea's east rift zone inferred from experimentally rehomogenized melt inclusions

Carbonates dissolution and precipitation in hemipelagic sediments overlaid by supersaturated bottom-waters - Gulf of Aqaba, Red Sea

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