Nitrogen Isotope (GeoBio)chemistry:
    - analytical methods (experimentation with carrier gas methods; Bebout et al., 2007, Chemical Geology)
    - incorporation of N during microbial chemical alteration of seafloor basalts (collaborative with Neil Banerjee and
        Matthew Izawa, Western Ontario University)
    - preservation of N biogeochemical signatures in ancient sedimentary and metasedimentary rocks (collaborative
        with Linda Godfrey, Rutgers University)
    - records of deep N subduction in HP and UHP metabasaltic suites (collaborative with Ralf Halama, Universität Kiel;
        Timm John, Universität Münster)
    - N subduction in ultramafic rocks (collaborative with Ralf Halama, Universität Kiel; Timm John, Universität
        Münster; Marco Scambelluri, Università di Genova; Horst Marschall, WHOI)
    - N behavior during partial melting (collaborative with Ian Buick, Stellenbosch University; Annie Palya, now at
        University of South Florida)
    - storage of N in microporous phases (collaborative with Charles Geiger, Universität Salzburg)

Other:
Lithium isotope behavior in subduction zones, Catalina Schist, California (collaborative with Sarah Penniston-Dorland,
    Univ. Maryland; Philip Pogge von Strandmann and Tim Elliott, Bristol University (see paper in EPSL, 2011)

Carbon cycling in subduction zones, with work based in the Italian/French Alps and Tianshan, China (collaborative with
    P. Agard, Université Pierre et Marie Curie-Paris 6; Marco Scambellluri, Università di Genova; T. John, Universität
    Münster; Roberto Braga, Università di Bologna; Fall AGU abstract, 2010; manuscript in preparation)

Fluid-rock interactions and fluid mobility in the Appalachian Valley and Ridge, West Virginia (with Mark Evans,
    Central Connecticut State University; paper in press, Tectonophys.)

Lithium isotope geospeedometry of subduction zone fluid-rock interactions, Tianshan, China (with Timm John,
    Universität Münster, and others)

Use of lake sediment C and N isotopes in paleoclimate reconstruction, New Jersey and Alaska, with Zicheng Yu,
    Lehigh University, and Long Li, now at Univ. Toronto (see paper in GCA, 2008; PDF)

Tree-ring C isotope records of anthropogenic impacts on temperate forests, Pennsylvania and New Jersey
    (collaborative with Long Li, Univ. Toronto, Zicheng Yu, Lehigh University; see paper in Chem. Geol., 2010)

Sensitivity of global carbonate-silicate models of atmospheric carbon dioxide to changes in subduction input
    [collaborative with Lee Kump, Penn. State University; see Goldschmidt, 2005, paper]

 

We have recently analyzed C-N concentrations and isotopic compositions of sediment [and altered seafloor
basalt] recovered on ODP Legs 185 and 205 [see Sadofsky and Bebout, 2004, G-cubed; Li and Bebout, 2005, JGR
and ODP Leg 205 Scientific Results), with the goals of characterizing organic sources and diagenetic history
and subduction input fluxes in the Izu-Bonin-Mariana and Central American convergent margins.  Locations for
ODP Sites 1149, 801, and also the ongoing NanTroSEIZE project (in which we are also involved), are shown on
the seafloor topographic map above (image above is from Smith and Sandwell Global Seafloor Topography,
NOAA and Scripps Institution of Oceanography).

Subduction-Zone Devolatilization (Italian Alps, Turkey; with Eizo Nakamura, Takuya Moriguti, Katsura Kobayashi
     ISEI; Philippe Agard, Université Pierre et Marie Curie-Paris 6)
    - major/trace element geochemistry, SIMS work on HP/UHP eclogites (King et al., 2004, G-cubed)
    - Schistes Lustres, W. Alps, devolatilization (Bebout, Agard, Kobayashi, Moriguti, Nakamura; Fall AGU abstract,
        2011; manuscript in preparation)

Lithium zoning in HP and UHP metamorphic porphyroblasts (collaborative with Katsura Kobayashi, Takuya Moriguti,
    Tatsuki Tsujimori, Tsutomu Ota, and Eizo Nakamura)

PML (Pheasant Memorial Laboratory, Director Eizo Nakamura, Misasa, Japan)
ISEI (Institute for Study of the Earth's Interior, Misasa, Japan)