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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 ...
A Study of the Sulfur Isotopic Composition of Martian Meteorites
(2012)
ABSTRACT
Title of Document: A STUDY OF THE SULFUR ISOTOPIC COMPOSITION OF MARTIAN METEORITES
Heather B. Franz, Ph.D., 2012
Directed By: Professor James Farquhar, Department of Geology and ESSIC
Sulfur is an ...
TRACING RETROGRADE METAMORPHIC FLUIDS IN A SUBDUCTION ZONE USING LI: FRANCISCAN COMPLEX, CALIFORNIA
(2012)
Centimeter-scale layers of eclogite and blueschist from Tiburon Peninsula, Franciscan Complex, CA were contrasted with a similarly layered sample from Dos Rios, CA. Eclogites from both localities have similar mineral ...
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, ...
Kinematics and Deformation History of the Cross Lake Greenstone Belt
(2004-12-17)
Greenstone belts are a common feature of Archean terrains. However, the tectonic environment for Archean earth remains in hot debate: did vertical or horizontal crustal movement dominate the Archean Eon? Small-scale ...
A CHEMICAL AND ISOTOPIC COMPARISON OF TWO 1ST-ORDER AGRICULTURAL TRIBUTARIES, KENT COUNTY, MARYLAND
(2005-05-27)
Nitrate derived predominantly from agricultural fertilizers results in algal blooms and wide-spread anoxia in estuarine environments. Roughly half the nitrate delivered to the Chesapeake Bay is derived from groundwater ...
Isotopic systematics of ultramafic and mafic rocks of the Taitao ophiolite, southern Chile
(2007-03-14)
A variety of ultramafic and mafic rocks from a well-mapped sampling of the ~6 Ma Taitao Ophiolite, Chile, have been examined. Calculated initial 187Os/188Os ratios of the peridotitic rocks range from 0.1168 to 0.1282. ...
An experimental study of silver partitioning in sulfide-oxide-melt systems at 800 degrees C
(2005-06-01)
Silver solubility, and partitioning of silver between pyrrhotite and magnetite at a(Ag) = 0.13 ± 0.04 (1σ) has been determined at 800°C, and a range of fS2 between -4.06 and -0.18 and fO2 between -14.90 and ...
TRACING SULFUR SOURCES IN AN ARCHEAN HYDROTHERMAL SYSTEM USING SULFUR MULTIPLE ISOTOPES - A CASE STUDY FROM THE KIDD CREEK VOLCANOGENIC MASSIVE SULFIDE DEPOSIT
(2005-07-07)
Mass-independent fractionation of sulfur isotopes in the Archean atmosphere resulted in surface sulfur reservoirs with distinct isotopic signatures. These signatures are used to trace the movement of sulfur through an ...
Impacts of Intermediate Water Formation in the North Pacific on Indonesian Throughflow and Equatorial Thermocline Depth: A High Latitude Control for ENSO Variability?
(2008-05-19)
Long-term variability in the strength and frequency of the El Niño - Southern Oscillation (ENSO) may be attributable to changes in background climatology. During times of cold climate events in the high latitudes, El Niño ...