Gray E. Bebout, Professor, Lehigh University
Metamorphic Geochemistry and Biogeochemical Cycling
Fall/Winter, 2009

2.7 Ga pillow basalt

Archean (2.7 Ga) Abitibi pillow basalt near Rouyn, Quebec (CA), visited by G. Bebout and L. Anderson

Contact Information:
Gray E. Bebout, Professor
Department of Earth and Environmental Sciences
31 Williams Drive
Lehigh University
Bethlehem, Pennsylvania  18015
Office: 610-758-5831
Laboratory: 610-758-6168
Abbreviated CV, G. Bebout

Recent Research at Lehigh University (Stable Isotope Laboratory)

Nitrogen Isotope (BioGeo)chemistry (OPPORTUNITIES FOR NEW GRADUATE STUDENTS)
    - analytical methods (experimentation with carrier gas methods; Bebout et al., 2007, Chemical Geology)
    - field applications (cyclosilicates, eclogites, behavior during partial melting, fluid-mineral fractionation; incorporation
        during microbial chemical alteration of seafloor basalts)
   
- preservation of N biogeochemical signatures in ancient sedimentary (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; Maureen Feineman, Penn. State University)

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)

Devolatilization and Paleohydrogeology in the Franciscan Paleoaccretionary Complex
    [Sadofsky and Bebout, 2003 (G-cubed), 2004 (International Geology Reviews), 2006, GSA International Book Series
    ["Phase Relations, High Pressure Terranes, P-T-ometry, and Plate Pushing"]

Fluid flow in foreland fold and thrust belts (Idaho/Montana and Appalachians, USA)
    [Anastasio et al., 2004, AJS; Rygel et al., 2006, Geofluids]

Tectonic evolution of coastal southern California (with Marty Grove, Stanford, based on Catalina Schist, San Onofre
    Breccia, and as related to the evolution of the Peninsular Ranges Batholith; paper in GSA Special Paper 436,
    2008; PDF)

ODP Leg 185 Shorebased Science (N-C subduction budgets; see Sadofsky and Bebout, G-cubed, 2004)

ODP Leg 205 Shorebased Science (N subduction budgets; see Li and Bebout, JGR, 2005, ODP SR Leg 205, 2006)

IODP Expedition 322 Shorebased Science (N-C subduction budgets; collaborative with Long Li, Univ. Toronto)

Use of lake sediment C and N isotopes in paleoclimate reconstruction (paper presented at 10th International
    Paleolimnology Symposium), New Jersey and Alaska, with Zicheng Yu, Lehigh University (see paper in GCA,
    2008; PDF)

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]

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)

WPacificSeafloorTopo 

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).

Recent/Ongoing Research Based in Misasa, Japan (Pheasant Memorial Laboratory, ISEI):

Boron Isotope Ion Microprobe Data for Catalina Schist and Alps UHP Metasedimentary Tourmalines
    [Bebout and Nakamura, Geology, 2003]


Major and Trace Element and Isotopic Compositions of Subduction Zone melange units

    - amphibolite-grade melange in Catalina Schist (Bebout and Barton, 2002, Chemical Geology)
    - lawsonite-albite and lawsonite-blueschist grade (King et al., 2006, EPSL; King et al., 2007, Chemical Geology)

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; AGU abstract, 2008;
        manuscript in preparation)

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

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

Courses Taught

EES 15 Volcanoes and the Ring of Fire (odd-year spring)
EES 90 recently "Space, The Final Frontier" but topics vary (odd-year fall)
EES 131 Introduction to Rocks and Minerals (every spring)
EES 293 Undergraduate Internships (in isotope geochemistry)
EES 393 Undergraduate Research
EES 334 (with Ken Kodama) Geosphere Structure and Evolution (odd-year fall)
EES 438 Petrogenetic Processes (graduate level; even-year spring)
EES 471 Stable Isotope Chemistry: Theory, Techniques, and Applications in the Earth and Environmental Sciences
    (graduate level; even-year fall)

[last modified 9-05-09]

little juggling guy

___________________________________________________________