Now showing items 1-10 of 101
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In Situ Sims, Micro-Baddeleyite U-Pb Dating Method for Mafic Rocks
Contributor:Chamberlain, K. R.; Harrison, T. M.; Schmitt, A. K.; Heaman, L. M.; Swapp, Susan; Khudoley, A. K.
Meeting abstract for "In Situ Sims, Micro-Baddeleyite U-Pb Dating Method for Mafic Rocks," June 2008.
Georadar-Derived Estimates of Firn Density in the Percolation Zone, Western Greenland Ice Sheet
Contributor:Brown, J.; Bradford, J.; Harper, J.; Humphrey, Neil; Pfeffer, W. T.; Mosley-Thompson, E.
Greater understanding of variations in firn densification is needed to distinguish between dynamic and melt-driven elevation changes on the Greenland ice sheet. This is especially true in Greenland's percolation zone, where ...
Understanding Melt Generation Beneath the Slow-Spreading Kolbeinsey Ridge Using (238)U, (230)Th, and (231)Pa Excesses
Contributor:Elkins, L. J.; Sims, Ken; Prytulak, J.; Elliott, T.; Mattielli, N.; Blichert-Toft, J.; Blusztajn, J.; Dunbar, N.; Devey, C.; Mertz, D. F.; Schilling, J. G.; Murrell, M.
To examine the petrogenesis and sources of basalts from the Kolbeinsey Ridge, one of the shallowest locations along the global ridge system, we present new measurements of Nd, Sr, Hf, and Pb isotopes and U-series disequilibria ...
Structure of Hematite (α-Fe2O3) (001) Surfaces in Aqueous Media : Scanning Tunneling Microscopy and Resonant Tunneling Calculations of Coexisting O and Fe Terminations, The
Contributor:Eggleston, Carrick; Stack, A. G.; Rosso, K. M.; Higgins, S. R.; Bice, A. M.; Boese, S. W.; Pribyl, R. D.; Nichols, J. J.
The iron oxide-water interface is of interest not only in geochemical and environmental processes, but also in fields ranging from corrosion to photocatalysis. The structure of α-Fe2O3 (001) surfaces is not fully understood, ...
Cooling History of Atlantis Bank Oceanic Core Complex : Evidence for Hydrothermal Activity 2.6 Ma Off Axis
Contributor:Schwartz, J. J.; John, Barbara; Cheadle, Michael; Reiners, P. W.; Baines, A. G.
We report 26 (U-Th)/He zircon ages from Atlantis Bank, Southwest Indian Ridge, which constrain time scales and rates of lower crustal cooling in ultraslow spreading oceanic crust in this setting. Samples from the detachment ...
Interaction of Redox Metalloproteins with Hematite Surfaces
Contributor:Khare, N.; Eggleston, Carrick; Colberg, P. J. S.
Meeting Abstract for "Interaction of Redox Metalloproteins with Hematite Surfaces," Plenary Day Lectures at "A Celebration of Geochemistry," Copenhagen.
Nonvolcanic Seafloor Spreading and Corner-Flow Rotation Accommodated by Extensional Faulting At 15°N on the Mid-Atlantic Ridge : A Structural Synthesis of ODP Leg 209
Contributor:Schroeder, T.; Dick, H. J. B.; Faul, U.; Casey, J. F.; Kelemen, P. B.
Drilling during ODP Leg 209, dredging, and submersible dives have delineated an anomalous stretch of the Mid-Atlantic Ridge north and south of the 15°20'N Fracture Zone. The seafloor here consists dominantly of mantle ...
Student Experience 08 : STaRRS Temperature Tools
Contributor:Houseal, Ana K.
Students get a chance to use various temperature tools to explore the Celsius temperature scale. They also will explore the differences in the temperature tools and determine and share with the whole group which tools are ...
Magnetic-Properties of Metaperidotitic Rocks as a Function of Metamorphic Grade : Implications for Crustal Magnetic-Anomalies, The
Contributor:Shive, P. N.; Frost, B. R.; Peretti, A.
Seventeen samples from the Malenco serpentinite in the Swiss Alps, representing systematic prograde metamorphic conditions from prehnite-pumpellyite to upper amphibolite, are moderately to strongly magnetic (average ...
Transitory Brucite and the Chemistry and Mineralogy of Serpentinite
Contributor:Beard, J. S.; Frost, B. R.; Bach, W.
Meeting abstract for "Transitory Brucite and the Chemistry and Mineralogy of Serpentinite."