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Geochimica et Cosmochimica Acta |
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This page lists current Associate Editors for Geochimica et Cosmochimica Acta, for each providing contact information and a brief description of disciplinary expertise. Authors should consult these statements with regard to suggesting AE's most appropriate for any particular manuscript.
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Robert C. Aller |
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Marine Sciences Research Center State University of New York at Stony Brook Stony Brook, NY 11794-5000, USA +001-631-632-8746 (voice) +001-631-632-xxxx (fax) raller@notes.cc.sunysb.edu |
My general research areas are early diagenetic processes, sediment-water exchange, and biogeochemical cycling in surficial marine sediments. The interrelationships between depositional environments, relative dominance of major redox reaction pathways (O2, NO3-, Mn-oxides, Fe-oxides, SO42- reduction), remineralization and preservation of sedimentary organic C, and authigenic mineral formation (Fe, S, C, Si) are of special interest. I have particular expertise in elemental cycling and early diagenetic authigenic mineral formation in modern deltaic systems, especially tropical regions; in animal-sediment interactions and the quantitative effects of macrobenthic activity on seabed biogeochemical processes; and the design and application of optical sensors in early diagenetic studies. |
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Jeffrey C. Alt |
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Department of Geological Sciences 3502 C. C. Little Building The University of Michigan Ann Arbor, MI 48109-1063 734-764-8380 (voice) 734-763-4690 (fax) jalt@umich.edu |
My general research interests and expertise are in submarine hydrothermal systems and geochemical cycling at mid-ocean ridges, ridge flanks, and in subduction zones. Specific interests include use of stable isotopes in tracing water-rock interactions; the application of S isotopes as tracers of water-rock reactions and geochemical cycling of sulfur; basalt-seawater interactions at conditions ranging from diagenesis to high grade hydrothermal metamorphism; formation of submarine hydrothermal deposits; low grade metamorphism. |
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Yuri Amelin |
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Geological Survey of Canada 601 Booth Street, Rm. 693 Ottawa, ON, Canada K1A 0E8 613-995-3471 (voice) 613-995-7997 (fax) yamelin@NRCan.gc.ca |
My area of research is geochronology, cosmochronology and radiogenic isotope geochemistry. In particular, I am interested in new analytical developments and applications that extend the use of isotopic methods in geosciences. The favorite applications of isotopic methods are formation and early evolution of the solar system, early evolution of the Earth's crust and mantle, disequilibrium in U and Th decay series and its application as a Quaternary geochronometer and isotopic tracer, and using isotopes to study genesis of rocks and ores. |
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Carol Arnosti |
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Department of Marine Sciences University of North Carolina Chapel Hill, NC 27599-3300 USA 919-962-5754 (voice) 919-962-1254 (fax) arnosti@email.unc.edu |
Marine organic chemistry, in particular microbially-mediated transformations of organic matter. Structural characterization of organic matter, carbohydrate chemistry, spectroscopic techniques (NMR, MS). Diagenesis of organic macromolecules. |
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Miryam Bar-Matthews |
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Geological Survey of Israel 30 Malchei Israel St. Jerusalem, Israel 95501 972-2-531-4293 (voice) matthews@mail.gsi.gov.il |
Paleoclimate of continental regions using cave deposits (speleothems); carbon, oxygen and hydrogen stable isotope studies of paleoclimate proxies; land-sea paleoclimate correlations, paleoclimate and archeology; U-Th series dating with emphasis on dating of speleothems, corals, carbonate nodules, travertines and tufas; the hydrological cycles of rainfall and unsaturated zone water in karstic terrains with emphasis on stable isotopes and geochemical processes; low temperature sedimentary mineralization of manganese, iron, copper, lead and uranium. |
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Liane G. Benning |
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School of Earth Sciences University of Leeds Leeds LS2 9JT, UK (+44-)113-233-5220 (voice) (+44-)113-233-5259 (fax) liane@earth.leeds.ac.uk |
General areas of expertise: experimental low temperature to hydrothermal aqueous geochemistry; thermodynamics and kinetics in fluid/mineral systems; biogeochemistry. Research Interests: (a) experimental determination of the kinetics and thermodynamics of fluid-rock interactions with emphases on nucleation, growth, and trace metal incorporation mechanism in mixed metal-sulphide and metal-oxide systems using conventional and synchrotron-based techniques; (b) elucidating the inorganic and biogenic chemical pathways leading to the formation of bio-materials in mixed mineral / fluid / bacterial systems with special emphasis on bio-mineralization mechanisms (c) field work related to processes controlling metal precipitation in active geothermal systems. |
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Thomas S. Bianchi |
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Department of Oceanography Texas A&M University College Station, TX 77843-3146, USA 979-845-5137 (voice) 979-845-6331 (fax) tbianchi@tamu.edu |
My general areas of expertise are organic geochemistry, biogeochemical dynamics of aquatic systems, carbon/nitrogen cycling in riverine, estuarine, and coastal ecosystems, and the application of chemical biomarkers in determining sources of dissolved/colloidal, suspended particulate, and sedimentary organic matter. Much of my work has focused on the fate and transport of organic matter in modern sediments, as well as applications in paleo-reconstruction. |
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Jay A. Brandes |
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Skidaway Institute of Oceanography 10 Ocean Science Circle Savannah, GA 31411, USA 912-598-2361 (voice) 912-598-2310 (fax) jay.brandes@skio.usg.edu |
Cycling of carbon and nitrogen in marine, freshwater and terrestrial environments, synchrotron-instrumental based studies of soils, sediments and dissolved compounds, the use of light stable isotopes (CHNOS) to examine sources and diagenesis of inorganic and organic compounds, hydrothermal production, alteration and destruction of inorganic and small organic compounds. |
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Alan D. Brandon |
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NASA - Johnson Space Center Houston, Texas 77058, USA 281-244-6408 (voice) 281-483-1573 (fax) alan.d.brandon1@jsc.nasa.gov |
Disciplinary Expertise: High temperature geochemistry. My present research on planetary materials is to gain a better understanding of processes that occurred in the solar nebula, and the earliest differentiation histories and chemical evolution of terrestrial bodies. I also apply petrological and geochemical data to constraining the origin of terrestrial peridotites and magmatic rocks in relation to mantle dynamics, large-scale tectonic processes, and geochemical cycles. Analytical expertise includes the precise measurement of isotopes using thermal ionization mass spectrometry, and the measurement of trace elements and sulfur isotopes using secondary ionization mass spectrometry. |
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David J. Burdige |
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Dept. of Ocean, Earth and Atmospheric Sciences Old Dominion University Norfolk, VA 23529-0276 USA 757-683-4930 (voice) 757-683-5303 (fax) dburdige@odu.edu |
My general area of interest is chemical oceanography, with particular reference to biogeochemical processes in estuarine and marine sediments, organic geochemistry of marine and estuarine sediments, and mathematical modelling of geochemical processes. More specifically, my past and present research activities have included studies of manganese and iron redox chemistry, the biogeochemistry and organic geochemistry of amino acids and carbohydrates in marine sediments, the cycling and reactivity of dissolved organic matter in sediments, and studies of shallow water sediment carbonate dissolution. |
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Robert H. Byrne |
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Marine Sciences Univ. South Florida 140 Seventh Ave. South St Petersburg FL 33701-5016 USA 727-553-1508 (voice) 727-553-1189 (fax) byrne@seas.marine.usf.edu |
Marine Chemistry, Solution Chemistry, Physical Chemistry and Carbonate System Chemistry: (1) Chemical Equilibria of Trace Metals; (2) Geochemical behavior of iron; (3) Geochemical behavior of yttrium and the rare earths; (4) Geochemical behavior of celestite and barite; and (5) In-Situ seawater analysis. |
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William H. Casey |
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Department of Chemistry Department of Geology University of California, Davis Davis, CA 95616, USA 530-752-3211 (voice) 530-752-1552 (fax) whcasey@ucdavis.edu |
I have broad interests in low-temperature geochemistry, but most of my research involves molecular-scale reactions in aqueous solutions. I also have experience in these general areas of solution chemistry: (i) the kinetics of geochemical reactions; (ii) the aqueous surface chemistry of oxide materials; (iii) the thermodynamic properties of minerals; and (iv) spectroscopy. I occasionally venture into the field for watershed studies as well. |
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Thomas Chacko |
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Department of Earth and Atmospheric Sciences University of Alberta Edmonton, Alberta, Canada T6G 2E3 780-492-5395 (voice) 780-492-2030 (fax) Tom.Chacko@ualberta.ca |
My research over the past decade has focused on three main areas: 1) metamorphic petrology; 2) stable isotope geochemistry; and 3) crustal evolution. Metamorphic studies have primarily been aimed at understanding of the melt- and/or fluid-related processes responsible for forming high-grade metamorphic terranes. Some of these studies have been field based, utilizing the methods of petrography, phase equilibria and geothermobarometry, whereas other studies have taken an experimental approach, using the piston cylinder apparatus to simulate high-grade processes in the laboratory. My research in stable isotope geochemistry has focused on the experimental determination of equilibrium oxygen, hydrogen and carbon isotope fractionation factors between minerals and fluids. This work has utilized the piston cylinder apparatus, conventional stable isotope analytical techniques, and more recently, hydrogen isotope analyses with the ion microprobe. Crustal evolution studies have focused on understanding the formation of continental crust in Precambrian terranes. These studies include major- and trace-element and radiogenic and stable isotope investigation of granitoids. I have also recently been involved in refining techniques for chemical U-Th-Pb dating of baddelyite and monazite using the electron microprobe. |
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Anne Cohen |
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Woods Hole Oceanographic Institution Woods Hole, MA 02543, USA 508- (voice) 508- (fax) acohen@whoi.edu |
Geochemistry of biominerals, especially carbonate skeletons of marine invertebrates; Vital Effects; Mechanisms and processes of Biogenic Mineralization with emphasis on coral biomineralization; Low temperature geochemistry with emphasis on experimental determination of factors affecting element partitioning and isotope fractionation between carbonate minerals and seawater; Paleoceanography of the Late Pleistocene and Holocene with emphasis on the reconstruction of past ocean temperatures using geochemical proxies; Diagenesis of carbonate skeletons; Impacts of global change, especially ocean acidification and warming, on marine biomineralization. |
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David R. Cole |
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Geochemistry Group Chemical and Analytical Science Division Oak Ridge National Laboratory Bethel Valley Road Bldg. 4500-S, Mail Stop 6110 Oak Ridge, TN 37831-6110 865-574-5473 (voice) 865-574-4961 (fax) coledr@ornl.gov |
My research has focused on four broad areas of geochemistry: (1) stable isotope geochemistry – fractionation and kinetics in mineral-fluid systems; (2) hydrothermal systems - experimental and natural; (3) diagenesis in sedimentary basins; and (4) paleoclimate studies using climate proxies such as paleosols. Emphasis is placed on quantifying the systematics of stable isotope fractionation in these systems. Experimental studies address both equilibrium fractionation and rates of isotopic exchange during interaction among minerals, fluids and gases. Studies on natural hydrothermal systems center on documenting isotopic zoning in minerals with SIMS, as well as determining the sources and fluxes of fluids. Diagenetic studies have explored the behavior of sulfur and carbon isotope fractionation, as well as the trace element distributions in authigenic phases. Carbon and oxygen isotopes are used in paleosols of various ages (e.g., Permian, Cretaceous, Plio-Pleistocene, Holocene) to evaluate paleo-temperatures, past CO2 levels, and the type and intensity of vegetation. |
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John Crusius |
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U. S. Geological Survey Woods Hole Science Center 384 Woods Hole Road Woods Hole, MA 02543, USA 508-457-2353 (voice) 508-457-2309 (fax) jcrusius@usgs.gov |
Broadly defined, my expertise lies in low-temperature, inorganic, aqueous geochemistry (primarily marine, but also freshwater). More specifically: Uranium-series radionuclides as tools for understanding oceanographic and lacustrine processes. Redox-sensitive metals (Re, Mo, U) as tools for understanding past changes in oxygen concentrations in the ocean. Mobility of trace metals (Re, Mo, U, Ag, Ba) and radionuclides (210Pb, 137Cs, 239+240Pu, Ra isotopes) in sediments. Permeable sediments, including submarine groundwater discharge using 222Rn and Ra isotopes as tracers. Recent sediment chronologies using 210Pb, 137Cs, 239+240Pu. Modeling of diffusion and bioturbation in sediments. 230Th as a tool for estimating rain rates of sedimentary materials to the seafloor (correcting for sediment focusing). Metal contamination in the environment (including mine pit lakes). Deepwater corals as archives of past conditions in the ocean. Instrumentation expertise: ICP-MS, alpha and gamma counters, delayed-coincidence counters (Ra isotopes), RAD7 radon counters. |
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Christopher John Daughney |
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Institute of Geological and Nuclear Sciences PO Box 30368, Lower Hutt, New Zealand +64-04-570-4761 (voice) +64-04-570-4600 (fax) c.daughney@gns.cri.nz |
My general area of research is aqueous environmental geochemistry. My own research involves experimental and modelling approaches for characterising equilibria in water-rock systems. Special areas of interest include 1) adsorption of metals and organics by mineral surfaces and bacterial cells; 2) surface complexation modelling; 3) extremophiles and their effects on the speciation and mobility of metals; 4) bacteria-mineral adhesion and its influence on bacterial and contaminant transport through porous media; and 5) chemical evolution of groundwater at the catchment scale and the use of tracer methods for evaluating in-situ rates of water-rock interaction. |
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Zhenhao Duan |
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Institute of Geology and Geophysics Chinese Academy of Sciences 19 Beitucheng Road Beijing, 100029, China +86-10-6200-7447 (voice) +86-10-6201-0846(fax) duanzhenhao@yahoo.com |
My general interests include: (1)Thermodynamic modeling of the properties (phase equilibrium, solubility, chemical speciation, PVT properties, enthalpy, activities, fugacity) of geological fluids and minerals; (2) Experimental studies of thermodynamic properties of geological fluids and minerals; (3) Molecular dynamics/Monte Carlo computer simulation of fluids and minerals; (4) The aqueous chemistry of brines or interstitial waters; (5) Geochemical aspects of CO2 sequestration and the formation conditions of methane hydrate. |
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James Farquhar |
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Earth Systems Science & Dept. of Geology University of Maryland College Park, MD 20782, USA 301-405-1434 (voice) 301-314-7970 (fax) jfarquha@essic.umd.edu |
Stable isotope geochemistry with a focus on non-mass-dependent and mass-dependent isotope effects involving sulfur and oxygen. Past work with mass-dependent isotope effects associated with sulfur metabolisms, non-mass-dependent isotope effects associated with geologic and meteoritic samples, laser fluorination analytical techniques, isotopic thermometry of high temperature metamorphic and igneous samples, precipitiation mechanisms of graphite, and isotopic exchange in slowly cooled rocks. |
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Frederick A. Frey |
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Earth, Atmospheric and Planetary Sciences MIT Cambridge MA 02139-4301 USA 617-253-2818 (voice) 617-253-7102 (fax) fafrey@mit.edu |
Mantle geochemistry and mafic lava petrogenesis |
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Susan Glasauer |
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Land Resource Science University of Guelph Guelph, Ontario N1G 2W1, Canada 519-824-4120 ext. 52453 (voice) nnnnnn fax) glasauer@uoguelph.ca |
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Johnson R. Haas |
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Department of Geosciences Western Michigan University Kalamazoo, MI 49008, USA 269-387-2193 (voice) 269-387-5513 (fax) jhaas@wmich.edu |
My general research interests include 1) the geochemical speciation and distribution of trace elements, including lanthanide and actinide elements, as well as trace transition metals and heavy metals, 2) the influence of living agents (bacteria, fungi, plants, etc...) on the speciation, adsorption, solubilization, precipitation and sequestration of trace elements in a biogeochemical context, 3) geomicrobiological controls on geochemical processes and element cycling, 4) pre-biotic chemical processes leading to the onset of life, and 5) determination of fundamental thermodynamic properties governing geochemical equilibria, including homogeneous aqueous reactions and heterogeneous reactions at the surface-aqueous interface. |
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H. Rodger Harvey |
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Chesapeake Biological Laboratory University of Maryland Center for Environmental Science Solomons, MD 20688, USA 410-326-7206 (voice) 410-326-7341 (fax) harvey@cbl.umces.edu |
Organic geochemistry and biogeochemistry of aquatic (mostly marine) systems with an emphasis on: (1) molecular and isotopic biomarkers of microbial and eukaryotic contributions and processing during early diagenesis (2) preservation mechanisms and transformation products of organic matter over geological time periods. |
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George R. Helz |
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Dept. Chemistry and Biochemistry University of Maryland College Park, MD 20742, USA 301-405-1797 (voice) 301-314-9121 (fax) gh17@umail.umd.edu |
Aqueous and environmental geochemistry, including geochemistry at redox extrema (e.g., photochemistry, sulfide chemistry); geochemistry of trace metals, metalloids and xenobiotics; geochemical processes in estuaries, aquifers and the ocean; applied thermodynamics and kinetics. Also, some experience with applications of stable and radioactive isotopes to problems in aquifers and estuaries. Geochemistry of the Anthropocene. |
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Gregory F. Herzog |
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Dept. Chemistry & Chemical Biology Rutgers University 610 Taylor Road Piscataway, NJ 08854-8087, USA 732-445-3955 (voice) 732-445-5312 (fax) herzog@rutchem.rutgers.edu |
My main interest is in what cosmogenic nuclides, both radioactive and stable, can reveal about 1) the irradiation environment of the solar system; 2) the cosmic-ray exposure histories of planetary materials; and, to 3) a lesser degree, the cosmic-ray exposure histories of terrestrial materials. I have had some experience in measuring stable isotopic abundances in extraterrestrial materials and using the results to calculate ages and to interpret thermal histories. |
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Juske Horita |
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Chemical and Analytical Sciences Division Oak Ridge National Laboratory P.O. Box 2008 Oak Ridge TN 37831-6110 USA 865-576-2750 (voice) 865-574-4961 (fax) horitaj@ornl.gov |
(1) General area of stable isotope geochemistry, both experimental studies and applications to natural systems; (2) Paleoclimatology and paleoceanography utilizing chemical and isotopic signals of terrestrial and marine proxy materials; (3) Sedimentary geochemistry, particularly of brine-sediment-hydrocarbon interactions and geomicrobiology; (4) Hydrology and environmental geochemistry with an emphasis on stable isotope techniques. |
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Jun-ichiro Ishibashi |
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Department of Earth and Planetary Sciences Kyushu University Hakozaki, Fukuoka 812-8581, Japan (+81) 92-642-2664 (voice) (+81) 92-642-2684 (fax) ishi@geo.kyushu-u.ac.jp |
My research interests and expertise are in submarine hydrothermal systems. I have studied fluid geochemistry both of gas and elemental species with interest in water-rock (and sediment) interactions, hydrothermal deposits, and relationship with microbial processes in hydrothermal ecosystems. Since I have lived on an island arc, I have interest also in chemical and isotopic composition of subaerial magmatic effluence, which sometimes plays important role in geochemical evolution within geothermal systems. |
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Karen Johannesson |
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Department of Earth and Environmental Sciences Tulane University 6823 St. Charles Avenue, Blessey Hall New Orleans, Louisiana 70118-5698, USA 504-862-3193 (voice) 504-865-5199 (fax) kjohanne@tulane.edu. |
My research interests broadly encompass environmental geochemistry and biogeochemistry with specific emphasis in trace element speciation, chemical hydrogeology, biogeochemical cycling of trace elements in the environment, and chemical limnology. The majority of my research efforts are focused on the study of trace element speciation in natural waters, including formation of metal/metalloid aqueous complexes with inorganic and organic ligands, redox speciation, studies of surface complexation of metals/metalloids to mineral/organic matter surfaces, and the manner in which these processes affect trace element cycles. I combine field, analytical, and experimental approaches in order to develop geochemical models that can improve our understanding of the biogeochemical processes that control trace element cycles in the near-surface environment. I am particularly interested in the biogeochemistry of the rare earth elements (REE), actinides, and oxyanion-forming trace elements such as arsenic, selenium, chromium, and tungsten in the environment. My chemical hydrogeologic research centers on the "evolution" of groundwater compositions along groundwater flow paths and the roles that biogeochemical and microbial processes play in trace element speciation and mobility along flow paths in aquifer systems. |
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Clark M. Johnson |
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Department of Geology & Geophysics 1215 W. Dayton St. University of Wisconsin Madison, WI 53706-1692, USA 608-262-1710 (voice) 608-262-0693 (fax) clarkj@geology.wisc.edu |
I am happy to handle manuscripts that fall in the broad fields of isotope geochemistry and hard-rock petrology. My isotopic work has included both stable isotopes (H, C, and O, as well as "non-traditional" isotopes such as Fe) and radiogenic isotopes (Rb-Sr, Sm-Nd, Lu-Hf, Re-Os, and U-Th-Pb). We have applied these isotope systems to problems in the low-temperature realm, from forensic and anthropological work to sedimentary diagenesis and geomicrobiology. In addition, we have done substantial work on isotopic and geochemical problems in igneous and metamorphic rocks in the mantle and crust. Finally, I am also happy to handle manuscripts involving various geochronological systems, particularly those on the heavier end of the periodic table. |
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Noriko Kita |
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Department of Geology and Geophysics 1215 W. Dayton Street University of Wisconsin Madison, WI 53706-1692, USA 608-262-7118 (voice) 608-262-0693 (fax) noriko@geology.wisc.edu |
Chronology and isotopic and elemental studies of meteorites and lunar samples, focusing on processes in the proto-planetary disk and on early evolution of planetary bodies. In particular (1) short-lived nuclides in CAIs, chondrules, and other meteoritic samples, (2) U-Th-Pb and other absolute age determinations of meteorites and lunar samples, (3) in-situ oxygen isotopic analyses in meteorites, (4) trace element studies of meteorites and lunar samples, and (5) high precision isotopic and trace element analytical techniques using secondary ion mass spectrometry (SIMS) and thermal ionization mass spectrometry (TIMS). |
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Christian Koeberl |
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Department of Geological Sciences University of Vienna Althanstrasse 14 A-1090 Vienna Austria +43-1-4277-53110 (voice) +43-1-4277-9531 (fax) christian.koeberl@univie.ac.at |
Topics: (1) Impact research (all aspects), chemical stratigraphy (boundary) - chemical and isotopic studies; (2) Tektites, impact glasses (all aspects); (3) Lunar meteorites; (4) Meteorites - general (all groups) - chemical and isotopic studies; (5) Antarctic meteorites - composition, occurence, alteration, etc.; (6) Lunar rocks: compositional studies. Methods: trace element methods (e.g., INAA, ICP, ICP-MS, PIXE), TIMS (e.g., Re-Os), ion probe, stable isotopes. |
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Randy L. Korotev |
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Department of Earth and Planetary Sciences Washington University St. Louis, MO 63130, USA 314-935-5637 (voice) 314-935-7361 (fax) korotev@wustl.edu |
Lunar geochemistry, Apollo lunar samples, and lunar meteorites. Impact history of the Moon. Meteorite impacts as a geologic process. Neutron activation and other bulk compositional analysis of geologic materials. Quantitative modeling of geochemical systems. |
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Stephan M. Kraemer |
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Center for Geosciences University of Vienna Althanstrasse 14 AT-1090 Vienna, Austria +43-1-4277-53463 (voice) +43-1-4277-9534 (fax) stephan.kraemer@univie.ac.at |
My research interests include low temperature biogeochemistry, including bioinorganic chemistry, aqueous chemistry and mineral/water interface geochemistry. I work on the elucidation of mechanisms, rates, and thermodynamics of processes that are important in the context of mineral weathering, inorganic pollutant transport, and biological nutrient acquisition. These processes include sorption, precipitation, and dissolution reactions, as well as redox reactions. I use a range of experimental methods in the area of aqueous and mineral surface chemistry including spectroscopic and stable isotope methods. |
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S. Krishnaswami |
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Physical Research Laboratory Navrangpura Ahmedabad-380009, India +91-79-6302129 (voice) +91-79-6301502 (fax) swami@prl.ernet.in |
My interest is in the field of low temperature aqueous geochemistry. I work on the applications of U-Th series disequilibria & cosmic-ray-produced isotopes as chronometers and tracers to study processes such as (i)chemical scavenging and particle dynamics in the sea, (ii) adsorption-desorption processes and mobility of elements in groundwater, (iii) accumulation and mixing in lake & marine sediments, Fe-Mn nodules and geochemical behaviour of elements in them. More recently my focus is on studies of chemical weathering and transportation through rivers, especially those from the Himalaya, to determine the sources of major ions, Sr, U, Os isotopes & Re to them, and their impact on ocean chemistry. |
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Alexander N. Krot |
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Hawai'i Institute of Geophysics and Planetology School of Ocean and Earth Science and Technology University of Hawai'i at Manoa Honolulu HI 96822, USA 808-956-3900 (voice) 808-956-6322 (fax) sasha@higp.hawaii.edu |
Cosmochemistry: mineralogy, petrology, trace and isotope chemistry, and classification of chondritic meteorites and their components (CAIs, chondrules, matrices); short-lived isotope chronology of CAI, chondrule, and matrix formation; redox conditions in the solar nebula; asteroidal and nebular alteration of chondritic components. |
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James Kubicki |
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Department of Geosciences The Pennsylvania State University 308 Deike Bldg. University Park, PA 16802, USA 814-865-3951 (voice) 814-863-7823 (fax) kubicki@geosc.psu.edu |
My research interests lie in the broad area of geochemical reaction mechanisms. Specifically, this includes diffusion and solubility of volatiles in melts and glasses, adsorption and sequestration of organic contaminants in soils and sediments, aqueous complexation of metals with dissolved organic matter, isotope exchange, dissolution of silica and feldspars, and adsorption of metals and organic ligands at mineral surfaces. The main approach in these studies has been to apply molecular modeling techniques to help interpret and understand experimental and spectroscopic data. |
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Typhoon Lee |
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Institute of Earth Sciences Academia Sinica 128 Academy Road, Section 2 Nan-kang, Taipei, 115 Taiwan +886-2-2783-9910 ext 612/613 (voice) +886-2-2783-9871(fax) typhoon@asiaa.sinica.edu.tw |
Nuclear astrophysics and cosmochemistry, in particular nucleosynthesis, formation and early evolution of our solar system, isotopic anomalies and extinct radio-nuclides in meteorites, pre-solar grains, comet dust, and interplanetary dust particles. Crustal evolution of East Asia. Petrogenesis of arc volcanos. Past global change focusing on coral composition as a proxy for ancient sea surface temperature and salinity. Trans-Neptune-Objects. Optical follow-up of Gamma Ray Bursters. Novel techniques and instrumentation for isotope ratio mass spectrometry. |
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Graham A. Logan |
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Geoscience Australia GPO Box 378, Canberra, ACT 2601 Australia 61-(0)-2-6249-9460 (voice) 61-(0)-2-6249-9961 (fax) graham.logan@ga.gov.au |
Organic geochemistry and biogeochemistry: (1) The study of the organic chemistry of fossil tissues, including the analysis of unusual lipid biomarkers, resistant biopolymers and stable isotopic compositions. (2) The application of biomarker and stable isotope geochemistry to the understanding of geological environments and secular variation (3) The study of microbial biomarkers and processes in ancient rocks, including Proterozoic and Archaean biogeochemistry. (4) Application of this information to better understand the composition and distribution of petroleum and mineral deposits. |
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Timothy W. Lyons |
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Department of Earth Sciences University of California, Riverside 1462 Geology Riverside, CA 92521-0423, USA +001-951-827-3106 (voice) +001-951-827-4324 (fax) timothy.lyons@ucr.edu |
Geochemistry of modern and ancient platform carbonates and oxygen-deficient marine systems. Biogeochemical cycles of carbon, sulfur, and metals and their associated isotopic signatures, including Fe and Mo. Proxy deconstructions of black shale paleoenvironments and Precambrian and Phanerozoic ocean-atmosphere evolution. Also seawater sulfate tracers, oxygen isotope relationships preserved in biogenic phosphate, sulfur geomicrobiology, organic biomarker approaches, methane and sulfur cycling in seep settings, astrobiology, carbonate chemostratigraphy, paleoceanography, low-temperature REE geochemistry, and early marine diagenesis. |
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Michael L. Machesky |
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Illinois State Water Survey 2204 Griffith Dr. Champaign, IL 61820 USA 217-333-9322 (voice) 217-244-3054 (fax) machesky@sws.uiuc.edu |
My general area of expertise is aqueous geochemistry with particular emphasis on (1) Experimental and modeling aspects of ion adsorption by mineral surfaces, and (2) biogeochemical processes in freshwater sediment and shallow aquifer systems." |
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Bernard Marty |
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Centre de Recherches Petrographiques et Geochimiques Rue Notre-Dame des Pauvres, BP 20 54501 Vandoeuvre-Les-Nancy France (33) 3 83 59 42 22 (voice) (33) 3 83 51 17 98 (fax) bmarty@crpg.cnrs-nancy.fr |
Geochemistry and geodynamics: Rare gas, carbon and nitrogen geochemistry; Early evolution of the Earth; Origin and impact of mantle plumes and related large igneous provinces. Environment : Origin and circulation of fluids in basins; Surface dating using cosmogenic 3He and 21Ne; U-He thermochronology. Cosmochemistry: Lunar and Martian volatiles; Extinct radioactivities and isotopic anomalies in meteorites. |
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Jun-ichi Matsuda |
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Department of Earth and Space Science Graduate School of Science Osaka University Toyonaka, Osaka 560-0043, Japan 81-6-6850-5495 (voice) 81-6-6850-5541 (fax) matsuda@ess.sci.osaka-u.ac.jp |
Noble gas geochemistry and cosmochemistry: Elemental abundances and isotopic compositions of noble gases in natural samples and synthetic materials in the laboratory. (1) The origin and the evolution of our solar system from the study of meteorites. (2) The early evolution of the Earth and planets. (3) The evolution of the atmosphere and the ocean of the Earth. |
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Tom McCollom |
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Center for Astrobiology Laboratory for Atmospheric and Space Physics University of Colorado Boulder, CO 80309, USA 303-735-3072 (voice) 303-492-6946 (fax) mccollom@lasp.colorado.edu |
My general areas of interest and expertise include aqueous geochemistry, fluid-rock interactions, microbial ecology, and astrobiology. Specific research interests include the organic geochemistry and microbiology of hydrothermal environments, energetics of microbial populations in geologic settings, numerical modeling of coupled geologic and microbial processes, geochemistry of serpentinization of ultramafic rocks and hydrothermal alteration of basalts, abiotic organic synthesis and prebiotic chemistry, and assessing the potential for life on Mars and Europa. |
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James McManus |
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College of Oceanic and Atmospheric Sciences Oregon State university Carvallis, OR 97331-5503, USA +001-571-737-8285 (voice) +001-571-737-2064 (fax) jmcmanus@coas.oregonstate.edu |
My general area of interest is on sediment biogeochemistry in both marine and lacustrine environments. More specifically my research includes the cycling of organic carbon, phosphorus, silicon, and trace metals in sediments (both marine and freshwater). Most of my trace metal work focuses on the geochemistry of metals that harbor the potential to serve as proxies for past ocean chemistry (e.g., barium, germanium, molybdenum, uranium). My trace metal work also includes the geochemistry of heavy stable isotopes (e.g., Mo, Ge, Fe) in marine sediments. |
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Anders Meibom |
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Museum National d'Histoire Naturelle Laboratoire d'Etude de la Matiere Extraterrestre USM 0205 (LEME), Case Postale 52 61, rue Buffon, 75005 Paris, France +33 1 40 79 35 43 (voice) +33 1 40 79 38 76 (fax) meibom@mnhn.fr |
Meteoritics/Cosmochemistry: Mineralogical and isotopic studies of pristine components in chondritic meteorites with implications for transport mechanisms and dynamic time scales in the early solar system. Geochemistry/Planetary evolution: The use of radiogenic isotopes and noble gases to investigate geochemical heterogeneity in the Earth's upper mantle with implications for large-scale mantle evolution. Biomineralization: The problem of biological versus environmental control over trace element and stable isotopic compositions of marine bio-carbonates. |
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Martin A. Menzies |
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Department of Geology Royal Holloway Univ. London Egham Surrey TW20 OEX UK (0)1784-443591 (voice) (0)1784-471780 (fax) menzies@gl.rhbnc.ac.uk |
Geochemistry, volcanism and tectonics, and mantle evolution. In particular: (1) The spatial and temporal relationships between rift processes in ancient and modern rift systems. Active research projects in the volcanic margins of the southern Red Sea and in the Red River Rift system, People's republic of China (i.e. PRC); (2) Large igneous provinces and the role they play in continental break-up. Active research projects dealing with the volcano-stratigraphy and chrono-stratigraphy of large igneous provinces in Ethiopia and Yemen; (3) Magmatism and tectonics and volcanic rocks as a proxy for mantle compositions. Research applications in the western USA and western Europe and active research in the PRC and Africa; (4) The petrology and geochemistry of mantle rocks. Active research projects in the Kaapvaal craton, South Africa, the North China Craton, PRC and western Europe; and (5) The nature and composition of the lithospheric mantle and the relationship between physical and chemical parameters. Active research programme in the eastern PRC. |
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Jack J. Middelburg |
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Netherlands Institute of Ecology (NIOO-KNAW) PO Box 140, 4400 AC Yerseke, The Netherlands +31-113-577-476 (voice) +31-113-573-616 (fax) j.middelburg@nioo.knaw.nl |
Biogeochemistry and sedimentary geochemistry: (1) Theory and modelling of early diagenesis and sediment-water exchange. (2) Stable isotope biogeochemistry, including applications in ecology and microbial ecology. (3) Sediment biogeochemistry, including sediment-animal interactions, benthic ecology, bioturbation studies. (4) Coastal biogeochemistry, cycling of organic carbon, nitrogen, iron, manganese, climate-active gases and wetlands. (5) Aquatic organic geochemistry, in particular organic matter degradation and process-oriented studies. |
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David W. Mittlefehldt |
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NASA - Johnson Space Center, mail code SR Houston, TX 77058 USA 281-483-5043 (voice) 281-483-1573 (fax) david.w.mittlefehldt1@jsc.nasa.gov |
My major interests are in the petrologic evolution of rocky bodies in the solar system by igneous processes, the cosmochemical evolution of the solar system as recorded in primitive meteorites, and geochemical processes that occur during impacts. In particular, I am interested in (i) how trace elements can be used to understand the early differentiation and later basalt generation on the Earth, Mars, the Moon and asteroids through the study of igneous rocks and mantle samples, (ii) the chemistry of chondrites as records of elemental fractionations that occurred when the gaseous nebula was converted to solid matter, and (iii) the use of lithophile and siderophile elements to understand mixing and fractionation processes that occur when melts form during hypervelocity impacts. |
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Alfonso Mucci |
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Department of Earth and Planetary Sciences McGill University Montreal, Quebec, H3A 2A7, Canada 514-398-4892 (voice) 514-398-4680 (fax) alm@eps.mcgill.ca |
General interests: Low-temperature/environmental/marine geochemistry. Specific interests: Application of chemical thermodynamics, kinetics and experimental designs to the characterization of mineral/water interactions, particularly carbonate minerals in the marine environment. Early diagenesis and elemental geochemistry in marine, coastal and estuarine sediments: elemental cycling and trace metal biogeochemistry. Recent research activities and publications have dealt with: (1) solubility and kinetics of reaction of carbonate minerals in aqueous solutions, (2) the source and fate of Hg in natural and artificial aquatic reservoirs, (3) the behavior of trace elements during mixing in a stratified estuary, (4) remobilization of trace metals in sediments under non-steady state conditions (e.g., catastrophic sedimentation event, resuspension). |
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Bjorn Mysen |
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Senior Scientist Geophysical Laboratory Carnegie Institution of Washington 5251 Broad Branch Rd., NW Washington DC 20015-1305, USA 202-478-8975 (voice) 202-478-8901 (fax) e-mail: mysen@gl.ciw.edu |
Experimental examination of the physics and chemistry of materials and energy transport that characterize igneous and hydrothermal processes in the interior of the earth and terrestrial planets. These processes include (i) experimental studies on melting and crystallization phase relations in the mantle and crust, (ii) element partitioning between minerals, fluids, and melts at high pressures and temperatures, (iii) relationships between structure and properties of silicate melts and aqueous fluids at high temperature and high pressure, (iv) solubility and solubility mechanisms of fluids in silicate melts and of silicates in aqueous fluids in the pressure-temperature regime of the earth's crust and upper mantle, (v) thermodynamics of minerals at high temperature, (vi) relationships between energetics and structure of minerals during melting, and (vii) transport and transport mechanisms in amorphous materials. |
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Hiroko Nagahara |
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Department of Earth and Planetary Science University of Tokyo Hongo, Tokyo 113-0033, Japan +81-3-5841-4508 (voice) +81-3-5841-8318 (fax) hiroko@eps.s.u-tokyo.ac.jp |
Planetary and igneous petrology focusing on physico-chemical processes among solid-liquid-gas in the early solar system and astrophysical environments and in igneous environments. It includes (1) experimental studies on kinetics of phase change such as evaporation, condensation, melting, and crystallization, (2) model application of these data to cosmochemical and geochemical evolution of solid materials, (3) petrological and mineralogical study on chondrites and differentiated meteorites, (4) elemental and isotopic mass transfer including diffusion at high temperatures in planetary and igneous environments, and (5) origin and early evolution of terrestrial planets and small bodies. |
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Martin Novak |
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Czech Geological Survey Geologicka 6 152 00 Prague 5, Czech Republic +420-2-51085333 (voice) +420-2-5818748 (fax) novak@cgu.cz |
Sulfur, nitrogen and carbon sotopes in biogeochemistry; element cycling in forest soils and wetlands; small catchments; forest decline; reemissions of biogenic elements from terrestrial ecosystems; lead isotopes in the environment; lead-210 dating. |
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Peggy A. O'Day |
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Division of Natural Sciences University of California, Merced PO Box 2039 Merced, CA 95344, USA 209-724-4338 (voice) 209-724-4424 (fax) poday@ucmerced.edu |
Research interests include (i) spectroscopic investigations of geochemical systems, especially synchrotron-based methods; (ii) molecular surface chemistry, particularly related to sorption and precipitation processes; (iii) geochemistry and fate of inorganic contaminants in the environment; (vi) surface chemistry and catalysis in hydrothermal systems related to pre-biotic organic synthesis. |
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Eric H. Oelkers |
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Laboratoire de Geochimie Univ. Paul Sabatier 38 rue des Trente Six Ponts 31400 Toulouse France +33 (0)5.61.55.87.85 (voice) +33 (0)5.61.52.05.44 (fax) oelkers@lmtg.ups-tlse.fr |
Focus is on quantifying the extent and consequences of chemical mass transfer/transport due to water/rock interaction and fluid flow. Major research areas are: (1) Experimental and theoretical determination of mineral dissolution/precipitation rates/mechanisms, mineral solubilities and solute speciation in aqueous fluids including application of (a) bulk measurements, (b) spectroscopic techniques including EXAFS, Raman and Infared spectroscopy, (c) petentiometric techniques, (d) use/application of the HKF and Pitzer equations of state for prediction of mineral solubilities, aqueous speciation, and chemical mass transport, and (e) transition state theory/surface speciation applied to describing rates; (2) Characterization of transport properties for water/rock interaction including: (a) rock permeabilities, (b) aqueous diffusion coefficients, (c) reactive surface areas, and (d) tortuousities; (3) Quantitative modeling of dynamic geochemical water/rock processes in response to fluid flow and water/rock interaction. Particular recent interest has been on sedimentary basins and ore formation. |
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Sandra Pizzarello |
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Department of Chemistry & Biochemistry Arizona State University Tempe, AZ 85287-1604, USA 480-965-3370 (voice) 480-965-2747 (fax) pizzar@asu.edu |
My research of several years has been devoted to the study of the organic material in carbonaceous chondrite meteorites, with emphasis on the molecular, isotopic, and chiral characterization of the Murchison, Murray, and Tagish Lake soluble organics. More recently, I have focused on non-racemic meteoritic amino acids with compound-specific isotopic analyses as well as model syntheses that would mimic their prebiotic catalytic activity and reactions. |
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Mark Rehkamper |
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Department of Earth Science & Engineering Imperial College London London SW7 2AZ, UK +44 20 7594 6391 (voice) +41 20 7594 7444 (fax) markrehk@imperial.ac.uk |
Isotope and trace element geochemistry of the mantle; geochemistry of the platinum-group elements; geochemistry and cosmochemistry of non-traditional or “heavy” stable isotopes; isotopic studies of the early solar system; new analytical methods, particularly for isotope analyses. |
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W. Uwe Reimold |
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Museum f. Natural History Humboldt University in Berlin Invalidenstrasse 43 10115 Berlin, Germany +49 30 2093 8470 (voice) +49 30 2093 8565 (fax) uwe.reimold@museum.hu-berlin.de |
My research interests encompass all aspects of impact crater geology, including crater geology, mineralogy of impactites/shock metamorphism, breccia formation, geochemistry of impactites and hydrothermal processes in and around impact structures; impact formations in the stratigraphic, especially in the Archean and early Proterozoic, record, and their recognition; ore deposits associated with impact structures; dike breccias and shock veins; pseudotachylitic breccias (of impact and tectonic origin). Other interests involve gold mineralization (mineralogy and mineral chemistry), and studies of the Precambrian of East and southern Africa; zircon mineralogy; radiometric dating of tectonic, tectonomagmatic, and impact events; PIXE analysis of ore mineralization. Techniques: petrography, radiometric isotopes, cathodo-luminescence, Raman spectroscopy, electron microscopy, proton-induced x-ray emission (PIXE). |
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Edward M. Ripley |
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Department of Geological Sciences Indiana University Bloomington, IN 47405, USA 812-855-1196 (voice) 812-855-7961 (fax) ripley@indiana.edu |
(1) Ore genesis, including magmatic Cu-Ni-PGE deposits, hydrothermal mineralization, and metal-enrichment in low-temperature environments. (2) Magma-water-rock interaction and stable isotopic systematics. (3) Petrogenesis of mafic magmatic systems with special emphasis on the application of stable and radiogenic isotopic analyses. (4) Experimental studies of stable isotopic fractionation and element partitioning. |
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Kevin M. Rosso |
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Pacific Northwest National Laboratory Richland, WA 99352, USA 509-371-6357 (voice) 509-371-6354 (fax) kevin.rosso@pnl.gov |
Fundamental biogeochemistry and reactivity of mineral-water and mineral-microbe interfaces with emphasis on molecular-scale processes; geochemical electron and proton transfer reactions; redox chemistry, kinetics and speciation of metal ions, organics, and biomolecules; theoretical and molecular computational mineralogy, crystal chemistry and geochemistry; mineral growth/dissolution and redox transformation processes; scanning probe microscopy; vacuum-based spectroscopic surface analyses; low-temperature aqueous and environmental geochemistry. |
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J. Kelly Russell |
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Department of Earth & Ocean Sciences University of British Columbia Vancouver, British Columbia, Canada V6T-1Z4 604-822-2703 (voice) 604-822-6088 (fax) krussell@eos.ubc.ca |
My principal expertise is in the fields of igneous petrology and volcanology but with allied skills in thermodynamics, mathematical-optimization and computer programming. I am fundamentally interested in the formation, transport and physical-chemical evolution of magmas and my approach has been to combine theoretical studies of magmatic processes to field-based observations. Much of my research has involved modelling the thermodynamic consequences of magmatic processes or developing methods to invert chemical and experimental measurements for new insights into magmatic processes (e.g., rates of reaction, extent of contamination). Keywords: silicate melts, magmas, mantle, thermodynamics, heat transfer, magmatic-differentiation, transport properties, optimization, numerical modelling |
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Sara S. Russell |
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Department of Mineralogy The Natural History Museum Cromwell Road London SW7 5BD, UK +44 (0) 20 7942 5074 (voice) +44 (0) 20 7942 5537 (fax) sarr@nhm.ac.uk |
Meteoritics and Cosmochemistry. The origin of chondrules, CAIs and chondritic matrix, and alteration of chondritic components within asteroids. Isotope cosmochemistry, especially short-lived isotopes and early solar system timescales. Mineralogy and petrology of meteorites and their classification. Meteorite collection and weathering. Isotopic analyses of materials using multi-collector ICP-MS and ion microprobe. |
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F. J. Ryerson |
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L-202 Institute of Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, Livermore, CA 94550 USA 925-422-6170 (voice) 925-422-1002 (fax) ryerson@llnl.gov |
Igneous and metamorphic petrology, focusing on experimental studies of mineral-melt and mineral-fluid partitioning of major and trace elements. Recent work has concentrated on the applications of these data to island-arc settings. I also have a long-term interest in diffusion in silicate melts and rock-forming minerals and the applications of these data to thermochronology and isotope systematics in earth and planetary materials. Most recently, I have worked on the applications of cosmogenic dating to active tectonics - primarly that associated with the Indo-Asian collision and Holocene climatic events that have shaped landforms that have been disturbed by active faulting. |
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Jacques Schott |
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Laboratoire de Geochimie Univ. Paul Sabatier 38 rue des Trente Six Ponts 31400 Toulouse France +33 (0)5.61.55.65.18 (voice) +33 (0)5.61.--.--.-- (fax) schott@lmtg.obs-mip.fr |
Generation of thermodynamic and kinetic data for modeling chemical mass transfers at the Earth surface and in the crust. Values of the thermodynamic parameters for minerals, aqueous species and solid-solution interfaces are obtained from laboratory experiments (i.e. recently, high temperature solubility and potentiometric measurements, in situ Raman spectroscopy, RMN, EXAFS) and numerical modeling. New fields of interest are the modeling of chemical weathering at the Earth’s surface, experimental modeling of stable isotope fractionation (i.e. B and Ge), and the study of the role of micro-organisms in geochemical processes. |
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Jeffrey Seewald |
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Woods Hole Oceanographic Institution Woods Hole, MA 02543, USA 508-289-2966 (voice) 508-457-2164 (fax) jseewald@whoi.edu |
General areas of expertise include hydrothermal and petroleum geochemistry. Specific interests include organic-inorganic interactions in subsurface environments, the development and application of laboratory experimental techniques to the study of fluid-rock reactions, reactivity of organic compounds at elevated temperatures and pressures, aqueous fluid speciation, and thermodynamic modeling of fluid-mineral equilibria. |
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Timothy J. Shaw |
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Department of Chemistry and Biochemistry University of South Carolina Columbia, SC 29208 803-777-0352 (voice) 803-777-xxxx (fax) shaw@mail.chem.sc.edu |
Cycling and transport of trace metals in coastal environments; incorporation of metals into benthic foraminifera; trace element tracers in the marine environment. |
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Jaap S. Sinninghe Damsté |
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Department of Marine Biogeochemistry and Toxicology Royal Netherlands Institute for Sea Research (NIOZ) P.O. Box 59, 1790 AB Den Burg, The Netherlands +31-222-369550 (voice) +31-222-319674 (fax) damste@nioz.nl |
Organic geochemistry and biogeochemistry with an emphasis on the application of biomarkers in (1) microbial process, (2) palaeoenvironmental and palaeoclimatic studies from Holocene up to the Palaeozoic, (3) the study of major geological events and (4) reconstruction of the microbial evolution of life. |
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Donald L. Sparks |
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Department of Plant and Soil Sciences University of Delaware 531 South Colege Ave. Newark, DE 19717-1303, USA 302-831-2532 (voice) 302-831-0605 (fax) dlsparks@udel.edu |
(1) Kinetics of geochemical processes including adsorption, precipitation, dissolution, and redox, at the mineral/water interface; (2) Surface chemical reactions and processes on soils, phyllosilicates, and metal oxides involving metals, metalloids, ligands, and radionuclides; and (3) Application of molecular-scale spectroscopies and microscopies to elucidate reaction mechanisms at mineral surfaces. |
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Garrison Sposito |
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Ecosystem Sciences Hilgard Hall #3110 University of California, Berekely Berkeley, CA 94720-3110 USA 510-643-8297 (voice) 510-643-2940 (fax) gsposito@nature.berkeley.edu |
(1) Aqueous geochemistry, with emphasis on reactions in soils and aquifers under terrestrial weathering conditions; (2) Surface chemical phenomena in soils and sediments involving metals, ligands (including organic ligands), and biota; chemistry of natural organic matter; clay mineral and metal oxide geochemistry; colloid chemistry in subsurface zones; (3) Computational geochemistry: chemical modeling of adsorption, complexation, and precipitation processes; computer simulation of mineral surface geochemistry at molecular scales. |
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Dimitri A. Sverjensky |
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Department of Earth and Planetary Science The Johns Hopkins University Baltimore, MD 21218 USA 410-516-8568 (voice) 410-516-7933 (fax) sver@jhu.edu |
Geochemistry of the solid-water interface, including the development of surface charge and the electric double layer, the interpretation of experimental studies and theoretical models of adsorption of cations and anions on mineral surfaces, and the theoretical prediction of adsorption reactions; Thermodynamics and kinetics of mineral-water reactions; Aqueous solution chemistry at low and high temperatures and pressures; Chemical equilibria and mass transfer in water-rock interactions; Origins of ore deposits in sedimentary environments; The origins of fluids in sedimentary basins. |
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Michael Toplis |
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Observatoire Midi-Pyrénées DTP-OMP (CNRS) 14, Ave. Edouard Belin F-31400 Toulouse, France +33 (0) 561 33 28 36 (voice) +33 (0) 561 33 29 00(fax) toplis@dtp.obs-mip.fr |
My research is centred on the role of silicate liquids in systems of interest to the Earth and planetary sciences. This involves use of experimental data, spectroscopy, thermodynamics and petrography. In detail, my fields of interest are: 1) Structure and properties of silicate liquids and glasses: Physical properties such as viscosity, density; thermodynamic properties such as heat capacity, volume; spectroscopic studies such as NMR, raman spectroscopy. 2) Mineral-melt equilibria: Phase equilibria, partition coefficients; kinetics of nulceation/crystallization; crystal size distributions. 3) Basaltic magmatism: MORB petrogenesis; gabbroic magma chambers; extraterrestrial magmatism. |
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Peter Ulmer |
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ETH Zurich Institute for Mineralogy and Petrology NW E77, Clausiusstrasse 25 CH-8092 Zurich, Switzerland +41 44 632 3955 (voice) +41 44 632 1636 (fax) peter.ulmer@erdw.ethz.ch |
Experimental petrology and mineral-physics, igneous petrology and geochemistry focusing on: (1) generation and differentiation of calc-alkaline magmas at convergent plate margins and alkaline magmas extensional settings; (2) stability of hydrous and carbonate phases in crustal and mantle compositions and mantle metasomatism by silicate and carbonate melts and fluids; (3) genesis of kimberlites and carbonatites in the upper mantle and transition zone; (4) experimental determination of phase equilibria in magmatic systems and the crystal/liquid partition coefficients at high temperatures and pressures and application to magma genesis and differentiation; (5) determination of physical properties (viscosities and densities) of magmas related to magma reservoir process, transport and emplacement in the mantle and crust; (6) synthesis, structure, stability, thermodynamic, volumetric and elastic properties of oxides, silicates, hydrates and carbonates at high-pressure and temperature conditions applicable to the earth upper mantle and transition zone. |
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David J. Vaughan |
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Department of Earth Sciences University of Manchester Manchester M13 9PL, UK +44 (0) 161-275 -3935 (voice) +44 (0) 161-275- 3947 (fax)) David.Vaughan@man.ac.uk |
Crystal chemistry, surface chemistry and reactivity of minerals, particularly metal sulfides and oxides, studied using a wide range of analytical, imaging and spectroscopic methods and computer modelling approaches with emphasis on molecular scale understanding. The experimental methods include optical, IR, Mossbauer, electron and X ray spectroscopies, and scanning probe and scanning electron microscopies. Geochemical processes associated with the cycling of metals between the geosphere, hydrosphere, biosphere and atmosphere, including the processes relevant both to ore formation and to environmental contamination. |
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Richard J. Walker |
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Department of Geology University of Maryland College Park, MD 20742, USA 301-405-4089 (voice) 301-314-9661 (fax) rjwalker@geol.umd.edu |
Isotope and trace element geochemistry, with emphasis on the highly siderophile elements; chemical evolution of the mantle and crust as studied using isotopic and elemental tracers; early solar system processes and chronology. |
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Lesley A. Warren |
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School of Geography and Geology McMaster University 1280 Main Street West Hamilton, ON L8S 4K1, Canada 905-525-9140 x27347 (voice) 905-546-0463 (fax) warrenl@mcmaster.ca |
As an aqueous geochemist, my research has broadly focused on characterizing trace metal geochemical behaviour in a variety of contaminated environments such as acid rock drainage (ARD), urban lakes, harbours and rivers, and vadose zone soils. Much of my research now integrates investigation of whether and how microbial activity may influence important geochemical processes such as mineral formation/dissolution, creation of micro-geochemical environments, and contaminant behaviour, a field I call microbial geochemistry. A major theme of my research is to combine intensive field investigation with laboratory experimentation to constrain identified, relevant processes. Our field approach is to combine high-resolution geochemical sampling and molecular microbial characterization, over both temporal (e.g. diel) and spatial (e.g. micron- millimetre) scales, and map that behaviour onto the biogeochemical architecture of the environment using a variety of imaging approaches (e.g. HR-TEM, CLSM, STXM). Laboratory investigation typically focuses on characterization of surface chemistry and reactivity of relevant solids for metal sorption using classic titration, modelling and more recently XAS techniques; and batch experiments to constrain the relevant biogeochemical processes controlling metal behaviour in a variety of contaminated soils and sediments. |
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Josef Werne |
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Large Lakes Observatory, and Dept. of Chemistry & Biochemistry University of Minnesota Duluth 10 University Dr., 109 RLB Duluth, MN 55812, USA 218-726-7435 (voice) 218-726-6979 (fax) jwerne@d.umn.edu |
My research area is broadly organic and stable isotope biogeochemistry. In particular, I focus on the use of lipid biomarkers and their isotopic compositions as tracers of (paleo)climate and environmental change, in modern and ancient sedimentary systems. My areas of expertise include the development and application of lipid-based paleo-proxies, reconstructing paleoclimate & environmental conditions using geochemical proxies in marine and lacustrine sedimentary systems. I am also interested in sedimentary sulfur isotope biogeochemistry and the formation of organic sulfur, organic matter deposition, preservation and remineralization in low-oxygen systems, and microbial geochemistry. |
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Rainer Wieler |
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ETH Zurich Institute for Isotope Geology and Mineral Resources NW C84 CH-8092 Zurich Switzerland +41 1 632 37 32 (voice) +41 1 632 11 79 (fax) wieler@erdw.ethz.ch |
My primary research interests are in noble gas cosmochemistry and geochemistry. In particular, I work on i) early solar system processes as recorded in meteorites, ii) the history of the solar wind as recorded in lunar samples and meteorites, iii) the cosmic-ray exposure history of extraterrestrial samples and the production systematics of cosmic-ray-produced (and nucleogenic) noble gases and radionuclides in terrestrial and extraterrestrial samples, iv) dating of landscape elements with cosmic-ray-produced nuclides. I have also some expertise in noble gas mantle geochemistry, noble gas limnology and dating involving noble gas isotopes. My wider interests include radiogenic and stable isotope cosmo- and geochemistry in general. |
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Roy A. Wogelius |
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Department of Earth Sciences University of Manchester Manchester M13 9PL, UK +44 (0) 161 275 3841 (voice) +44 (0) 161 275 3947 (fax) roy.wogelius@manchester.ac.uk |
Key areas of interest for me include low temperature aqueous geochemistry, mineral surface chemistry and structure, mineral reaction kinetics, adsorption-desorption reactions of metals and organic acids, and most recently I have also become interested in how biofilms affect mass transport in aquatic systems. Research has focused on the development and application of experimental apparatus and analytical equipment in order to study minerals and mineral surfaces with sub-micron to angstrom resolution, in particular using the scanning proton microprobe and synchrotron radiation for both surface and bulk analysis. Applications of this work have extended from oxidation reactions on Mars to radionuclide mobility in UK groundwaters. |
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Chen Zhu |
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Department of Geological Sciences Indiana University 1001 East 10th St. Bloomington, IN 47405, USA 812-856-1884 (voice) 812-856-2223 (fax) chenzhu@indiana.edu |
Hydrogeochemistry: Kinetics and thermodynamics of chemical reactions and isotopic changes related to groundwater-rock interactions in aquifers. Solid solution models and solid solution-aqueous solution interactions. Field studies of groundwater geochemistry. Geochemical modeling of aqueous speciation and complexation, surface adsorption, dissolution, precipitation, and reactive mass transport. Inverse mass balance modeling. Contaminant Geochemistry: Thermodynamic and kinetic properties of contaminants (e.g., As, Pb, Zn, Cr, and Ra) and reactions involving contaminants in the environment. Partitioning of trace elements (including contaminants) between aqueous solution and solids. Sorption models. Characterization of solids and solid surfaces. Global Environmental Changes: Aquifers as archives of paleoclimate and paleohydrology, studied through chemical and isotopic tracers, groundwater dating, and numerical modeling. Geochemistry related to carbon sequestration. |
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