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A Semianalytical, Three Dimensional Model of Microstructure in Multiparticle, Multiphase Flow
(2011)
This dissertation presents a three dimensional microgeodynamic model of grain-melt geometry in partially molten rocks. The isotropic unit cell of the partially molten rock is characterized by a face-centered-cubic symmetry, ...
Quantification of Permeability-Porosity Relationships in Seafloor Vent Deposits: Dependence on Pore Evolution Processes
(2011)
Hydrothermal mineral deposits formed along seafloor spreading centers help regulate the transfer of heat and mass from Earth's interior to the oceans. Aqueous fluids circulate within the seafloor and are emitted through ...
PROGRESSIVE MICROSCOPIC DAMAGE AND THE DEVELOPMENT OF MACROSCOPIC FRACTURE IN POROUS SANDSTONES
(2011)
The precursory phenomena associated with dilatancy have been extensively studied as a potential means of earthquake prediction. It is known that microstructural damage induced dilatancy precedes macroscopic failure of a ...
Crystallization of a Subsurface Ocean on Triton
(2011)
Planetary magma oceans are present throughout the Solar System in a variety of forms. Over time, these oceans pass through various evolutionary stages, influencing the dynamics of the planetary body in question. Magma ...
Geomorphic and Hydrologic Controls on Tidal Prism and Inlet Cross Sectional Area for Chesapeake Bay Lagoons
(2011)
Previous studies have defined a power function between tidal prism and inlet cross sectional area for many lagoon systems. The goals of this study are to first, determine underlying processes that generate the area-prism ...
Reaction rates and textural development of hydrolysis reactions in the system MgO-SiO2-H2O
(2011)
Experiments in the simplified systems MgO-SiO<sub>2</sub>-H<sub>2</sub>O (MSH) and MgO-SiO<sub>2</sub>-H<sub>2</sub>O-CO<sub>2</sub> (MSHC) have been conducted by using hydrothermal diamond anvil cells to investigate ...
HIGH PRESSURE REDOX GEOCHEMISTRY OF TUNGSTEN IN METAL-SILICATE SYSTEMS: IMPLICATIONS FOR CORE FORMATION IN THE EARTH
(2011)
Geochemical models of core formation are commonly based on core and mantle abundances of siderophile elements. Because of the affinity of these elements for metallic phases, they are thought to be highly concentrated in ...
Metals in Arc Magmas: The Role of Cu-Rich Sulfide Phases
(2011)
Based on experiments performed on hydrous andesitic melts at 1000°C, 150 MPa, <italic>f</italic>O<subscript>2</subscript> from the Co-CoO to Ni-NiO buffer, and log <italic>f</italic>S<subscript>2</subscript> equal to -0.5 ...
Lithium and delta7Li behavior during metamorphic dehydration processes and crustal evolution
(2011)
Li isotopes have been used as a tracer of a wide range of geological processes, because the two stable isotopes of Li have significant relative mass difference and large elemental dispersion in Earth. In order to understand ...
The Micron Scale Pb Isotopic Systematics of the Lower Continental Crust
(2011)
The thermochronology, genetic relationships, and U-Th-Pb history of the deep crust in the North China Craton, the Tanzanian Craton, and the Mozambique Belt have been interrogated using the Pb isotopic system in feldspars ...