See the
new review papers on subduction zone chemical/isotopic cycling and metasomatism:
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.
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, presented at LPSC, 2011, and AbSciCon, 2012)
- preservation
of N biogeochemical signatures in ancient sedimentary and metasedimentary
rocks (collaborative
with Linda Godfrey,
Rutgers University; see paper in Geology, 2013)
- records of deep N subduction
in HP and UHP metabasaltic suites (collaborative with Ralf Halama,
Universität Kiel;
Timm John,
Universität Münster, see paper in GCA, 2010; Nathan Collins, Lehigh Ph.D. student)
- N subduction
in ultramafic rocks (collaborative with Ralf Halama, Universität
Kiel; Timm John, Universität
Münster;
Marco Scambelluri, Università di Genova; Horst Marschall,
WHOI, see paper in International Journal
of
Earth Sciences, 2012)
-
N behavior during partial melting (collaborative with Ian Buick,
Stellenbosch University; Annie Palya, now at
Florida International University, see paper in Chemical Geology, 2010)
- storage of
N in microporous phases (collaborative with Charles Geiger, Universität
Salzburg; Kris Lazzeri, working
in environmental consulting in Alaska, EA Engineering, Science, and Technology, Inc.)
Other:
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 Topo-
graphy, 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,
2012; Chemical
Geology, 2013)
Lithium
zoning in HP and UHP metamorphic porphyroblasts (collaborative
with Katsura Kobayashi, Takuya Moriguti,
Tatsuki Tsujimori, Tsutomu Ota,
Eizo Nakamura, and Bill Carlson)
PML (Pheasant Memorial
Laboratory, Director Eizo Nakamura, Misasa, Japan)
ISEI (Institute for Study of
the Earth's Interior, Misasa, Japan)
[last modified 5-15-13]
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