A5062927143- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Geochemistry and Geologic Mapping
- earthquake and tectonic studies
- Radioactive element chemistry and processing
- Metallurgical Processes and Thermodynamics
- Geochemistry and Elemental Analysis
- Astro and Planetary Science
- Mineralogy and Gemology Studies
- Metal Extraction and Bioleaching
- Glass properties and applications
- Hydrocarbon exploration and reservoir analysis
- Planetary Science and Exploration
- Paleontology and Stratigraphy of Fossils
- Clay minerals and soil interactions
- CO2 Sequestration and Geologic Interactions
- Crystal Structures and Properties
- X-ray Spectroscopy and Fluorescence Analysis
- Chemical Thermodynamics and Molecular Structure
- Chemical Synthesis and Characterization
- Geomagnetism and Paleomagnetism Studies
- Extraction and Separation Processes
- Iron and Steelmaking Processes
- Field-Flow Fractionation Techniques
- Organometallic Compounds Synthesis and Characterization
Dalhousie University
2015-2023
University of Toronto
2010-2019
Lawrence Livermore National Laboratory
1994-1997
Carnegie Institution for Science
1991-1993
Geophysical Laboratory
1991-1993
Rensselaer Polytechnic Institute
1987-1991
Using a newly-calibrated relation for cerium redox equilibria in silicate melts (Smythe and Brenan, 2015), an internally-consistent model zircon-melt partitioning of Ce, we provide method to estimate the prevailing conditions during crystallization zircon-saturated magmas. With this approach, oxygen fugacities were calculated samples from Bishop tuff (USA), Toba (Indonesia) Nain plutonic suite (Canada), which typically agree with independent estimates within one log unit or better. success...
Experiments were performed to establish the stability limits and mineral – sulfide melt partitioning behavior of platinum-group minerals laurite (Ru,Os,Ir)S2 Ru–Os–Ir alloy as functions temperature sulfur fugacity. Ruthenium-doped experiments yielded up ~1275 °C at log f (S2) −2.0, with replaced by Ru higher temperature. Similar results observed −2 −1.3 for compositions doped multiple PGE, except that coexisted T ≤ 1265°C. Laurite from these latter found be Ru–Os–Ir-rich Pt–Pd-poor, grains...
Chromite is widely recognized to act as a collector for platinum group elements (PGE), which tend be observed discrete grains of minerals included within magmatic chromite grains. In the course experiments involving re-equilibration or growth and Cr-spinel in molten silicate, we observe that (PGM; including metal alloys laurite) form at mineral–melt interface. The formation PGM extent requires mechanism sustained transport PGE from source experiment site deposition. We propose driving force...
Research Article| December 01, 2013 Sulfide-Olivine Fe-Ni Exchange and the Origin of Anomalously Ni Rich Magmatic Sulfides Stephen J. Barnes; Barnes † 1CSIRO Earth Science Resource Engineering, 26 Dick Perry Ave., Kensington, Perth, WA 6151, Australia †Corresponding author: e-mail, steve.barnes@csiro.au Search for other works by this author on: GSW Google Scholar Bélinda Godel; Godel Derya Gürer; Gürer 2Rheinische Friedrich-Wilhelms Universität Bonn, Steinmann Institut, Poppelsdorfer...
Research Article| January 01, 2016 Experimental Results on Fractionation of the Highly Siderophile Elements (HSE) at Variable Pressures and Temperatures during Planetary Magmatic Differentiation James M. Brenan; Brenan Department Earth Sciences, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada, jbrenan@dal.ca. Sciences Centre, 22 Russell Street, Toronto, Ontario M5S 3B1, Canada Search for other works by this author on: GSW Google Scholar Neil R. Bennett; Bennett Geophysical...
We investigate the origin of high platinum-group element (PGE) abundances associated with chromite-rich rocks by determining relative partitioning these elements between chromite- and sulfide-silicate liquids. Chromites were crystallized in presence immiscible sulfide silicate melts experiments at 1 GPa, producing a few, relatively large (20–50 μ ) crystals, which analyzed laser ablation ICP-MS. Our results show that PGE inventory chromite melt produced is dominated and/or alloy micronuggets...