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The role of mechanical mixing in the formation of reaction zones in subduction-related melange
(2013)
Traverses across metamorphic reaction zones at contacts between mafic rocks and ultramafic mélange matrix were analyzed in two mélange zones (Catalina Schist, Santa Catalina Island, CA, and Attic-Cycladic ...
CONSTRAINTS ON THE DEPOSITIONAL AGES OF LESSER HIMALAYAN ROCKS IN CENTRAL NEPAL AND THEIR STRUCTURAL IMPLICATIONS
(2009)
The lack of good exposures and paucity of datable horizons in central Nepal has hindered the ability of geologists to piece together a relatively cohesive and straightforward stratigraphic succession within the Lesser ...
Quantitative modeling of mantle heterogeneity and structure
(2010)
Mantle-derived rocks, particularly mid-ocean ridge basalts (MORB) and intraplate ocean island basalts (OIB), provide insights into the compositional heterogeneity and first-order structural make-up of the modern mantle; ...
The Effect of CO2 on Copper Partitioning in Sulfur- Free and Sulfur-Bearing Felsic Melt-Vapor-Brine Assemblages
(2012)
Analysis of fluid inclusions from porphyry copper deposits (PCD) reveals that magmatic vapor and/or brine are vital for the removal of copper from arc magmas and its transport to the site of ore formation. Experiments in ...
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 ...
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 ...
Anatexis and crustal differentiation: Insights from the Fosdick migmatite-granite complex, West Antarctica
(2014)
In the Fosdick migmatite-granite complex of West Antarctica, U-Pb geochronology of monazite in migmatites and zircon in granites records two episodes of high-temperature metamorphism, one in the Devonian-Carboniferous and ...
THE GEOCHEMICAL BEHAVIOR OF SCANDIUM DURING FRACTIONAL CRYSTALLIZATION AND IMPLICATIONS FOR ORE FORMATION
(2020)
Demand for scandium is increasing due to the use of scandium-aluminum alloys in the aerospace and sporting goods industries, and in solid-oxide fuel cells. Scandium deposits are associated with mafic intrusions and laterites, ...
DYNAMIC MELT PROCESSES IN THE LITHOSPHERES OF MARS AND IO
(2020)
The interior structures of planetary bodies beyond the Earth are broadly unknown. Our observational capacity is largely limited to surface imagery from spacecraft. The work presented in this dissertation uses novel modeling ...
CHARACTERIZING THE DURATION, PERIODICITY AND CHEMICAL IMPACT OF FLUID TRANSPORT IN THE SUBDUCTING SLAB: INSIGHTS FROM ISOTOPE GEOCHEMISTRY OF HIGH-PRESSURE METAMORPHOSED OCEANIC CRUST
(2021)
Subduction zones are key loci of geochemical cycling and natural hazards on Earth including large earthquakes and explosive volcanic eruptions. Fluids produced during subduction are thought to play a role in all these ...