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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 ...
Air Compression as a Mechanism for the Underdamped Slug Test Response in Fractured Glacier Ice
Contributor:Meierbachtoll, T. W.; Harper, J. T.; Humphrey, Neil; Shaha, J.; Bradford, J. H.
Artificial perturbations of borehole water levels, known as slug tests, are a useful means of characterizing the glacier hydrologic system. Slug tests were performed on Bench Glacier, Alaska, in 21 boreholes over three ...
Two Modes of Accelerated Glacier Sliding Related to Water
Contributor:Harper, J. T.; Humphrey, Neil; Pfeffer, W. T.; Lazar, B.
We present the first glacier-wide detailed measurement of basal effective pressure and related observations including bed separation to elucidate the role of water in sliding. The hard bedded glacier instrumented in our ...
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."
Evolution of the Southwest Indian Ridge from 55°45'E to 62°E : Changes in Plate-Boundary Geometry Since 26 Ma
Contributor:Baines, A. G.; Cheadle, Michael; Dick, H. J. B.; Scheirer, A. H.; John, Barbara; Kusznir, N. J.; Matsumoto, T.
From 55°45'E to 58°45'E and from 60°30'E to 62°00'E, the ultraslow-spreading Southwest Indian Ridge (SWIR) consists of magmatic spreading segments separated by oblique amagmatic spreading segments, transform faults, and ...
Adatom Fe(III) on the Hematite Surface : Observation of a Key Reactive Surface Species
Contributor:Eggleston, Carrick; Stack, A. G.; Rosso, K. M.; Bice, A. M.
The reactivity of a mineral surface is determined by the variety and population of different types of surface sites (e.g., step, kink, adatom, and defect sites). The concept of "adsorbed nutrient" has been built into crystal ...
Thermochronologic Evidence of Major Tectonic Denudation Associated with Detachment Faulting, Northern Ruby Mountains : East Humboldt Range, Nevada
Contributor:Dokka, R. K.; Mahaffie, M. J.; Snoke, Art
Fission track (FT) thermochronology studies on igneous and metamorphic rocks from the Ruby Mountains-East Humboldt Range metamorphic core complex provide important constraints on the timing and nature of major mid-Tertiary ...
Differential Stress, Strain Rate, and Temperatures of Mylonitization in the Ruby Mountains, Nevada : Implications for the Rate and Duration of Uplift
Contributor:Hacker, B. R.; Yin, A.; Christie, J. M.; Snoke, Art
Knowledge of the magnitude of the differential stress during the formation of mylonitic rocks provides constraints on mechanical and thermal models for the exhumation of the metamorphosed foot walls of major low-angle ...
Comment on "Limiting Depth of Magnetization in Cratonic Lithosphere"
Contributor:Frost, B. R.; Shive, P. N
Comment on "Limiting Depth of Magnetization in Cratonic Lithosphere."
Characterizing the 410 km Discontinuity Low-Velocity Layer Beneath the La Ristra Array in the North American Southwest
Contributor:Jasbinsek, J. J.; Dueker, Ken; Hansen, S. M.
Receiver functions recorded by the 54-station 920 km long Program for Array Seismic Studies of the Continental Lithosphere-Incorporated Research Institutions for Seismology Colorado Plateau/Rio Grande Rift Seismic Transect ...