Abitibi (2.7 Ga) pillow basalts near Rouyn-Noranda, Quebec, containing a record of aqueous chemical alteration.
October 2013 issue of ELEMENTS on "Nitrogen and its (biogeocosmo)chemical cycling"
(editors G. E. Bebout, M. L. Fogel, and P. Cartigny; see the cover of the issue here)
Recent review articles/book chapters:
Bebout, G. E., 2012, Ch.
9. Metasomatism in subduction zones of oceanic slabs, mantle wedges,
and the slab-mantle interface, in D. Harlov, and H. Austrheim,
editors, Metasomatism and Metamorphism: The Role of Fluids in Crustal and Upper Mantle Processes,
Springer, Lecture Notes in Earth Sciences, ISBN: 978-3-642-28393-2.
Carbon cycling in subduction zones (see the photograph above), with work based in the Italian/French/Swiss Alps and Tianshan, China (collaborative with S. Angiboust, GFZ, Potsdam; P. Agard, Universitť Pierre et Marie Curie-Paris 6; Marco Scambellluri and Laura Crispini, Universitŗ di Genova; T. John, Freie Universitšt Berlin; presentations at Fall AGU, 2010, 2012, 2013; Goldschmidt Conference, 2013; GSA Annual Meeting, 2014; see Cook-Kollars et al., 2014, and Collins et al., 2015, both papers in Chemical Geology)
Nitrogen Isotope (GeoBio)chemistry:
(experimentation with carrier gas methods; Bebout et al., 2007, Chemical Geology)
Incorporation of N during biotic/abiotic chemical alteration of seafloor basalts (collaborative with Neil Banerjee and Matthew Izawa, Western University, Ontario, and Eizo Nakamura and Katsura Kobayashi, ISEI; presented at LPSC, 2011, 2014; AbSciCon, 2012, 2015)
Preservation of N biogeochemical signatures in ancient sedimentary and metasedimentary rocks (collaborative with Linda Godfrey, Rutgers University; paper in Geology, 2013)
Records of deep N subduction in HP and UHP metabasaltic suites (collaborative with Ralf Halama, Universitšt Potsdam; Timm John, Freie Universitšt Berlin, see paper in GCA, 2010)
in ultramafic rocks (collaborative with Ralf Halama, Universitšt Potsdam; Timm John, Freie Universitšt Berlin;
Marco Scambelluri, Universitŗ di Genova; Horst Marschall,
WHOI; paper in International Journal of
Earth Sciences, 2012)
Nitrogen behavior during partial melting (collaborative with Ian Buick, Stellenbosch University; Annie Palya, now at Florida International University, paper in Chemical Geology, 2010; ongoing work by Nathan Collins, Lehigh University Ph.D. student)
Storage of N in microporous phases (collaborative with Charles Geiger, Universitšt Salzburg; Kris Lazzeri, working in environmental consulting; presented at Goldschmidt Conference, 2013, Florence Italy; see Bebout et al., 2015, American Mineralogist)
We 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. More recently, we are working
on sediment C-N inputs into the Sunda-Java margin. Locations for DSDP/ODP Sites 211, 261, 262, and 765 are shown on the seafloor topographic map above (image above is from Smith and Sandwell
Global Seafloor Topography, NOAA and Scripps Institution of Oceanography).
Devolatilization (Italian Alps, Turkey; with Eizo Nakamura, Takuya
Moriguti, Katsura Kobayashi, ISEI; Philippe Agard, Universitť
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, 2013, Chemical Geology)
Stable Isotope Zoning in HP and UHP Metamorphic Porphyroblasts (collaborative
with Takuya Moriguti, Tatsuki Tsujimori, Tak Kunihiro, Tsutomu Ota,
Katsura Kobayashi, Eizo Nakamura, and Bill Carlson)
ISEI (Institute for Study of
the Earth's Interior, Misasa, Japan)