A5018424240- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geochemistry and Geologic Mapping
- Geology and Paleoclimatology Research
- High-pressure geophysics and materials
- Radioactive element chemistry and processing
- Geochemistry and Elemental Analysis
- Hydrocarbon exploration and reservoir analysis
- Radioactive contamination and transfer
- Groundwater and Isotope Geochemistry
- Radioactivity and Radon Measurements
- Isotope Analysis in Ecology
- Geomagnetism and Paleomagnetism Studies
- Methane Hydrates and Related Phenomena
- Marine and fisheries research
- Paleontology and Stratigraphy of Fossils
- Karst Systems and Hydrogeology
- Iron and Steelmaking Processes
- Geological Studies and Exploration
- Geological formations and processes
- Archaeology and ancient environmental studies
- Minerals Flotation and Separation Techniques
- Clay minerals and soil interactions
- Metallurgical Processes and Thermodynamics
- Geological and Geophysical Studies Worldwide
University of Illinois Urbana-Champaign
2014-2023
University of Illinois System
2021-2023
University of Illinois at Springfield
2015-2020
Pacific Northwest National Laboratory
2010
Lawrence Berkeley National Laboratory
2010
University of the Pacific
2006
Brown University
2000
University of California, Santa Cruz
1994-1998
Colorado College
1988
Research Article| July 01, 2015 Giant Kiruna-type deposits form by efficient flotation of magmatic magnetite suspensions Jaayke L. Knipping; Knipping * 1Department Earth and Environmental Sciences, University Michigan, 1100 North Avenue, Ann Arbor, Michigan 48109-1005, USA *E-mail: jaaykek@umich.edu Search for other works this author on: GSW Google Scholar Laura D. Bilenker; Bilenker Adam C. Simon; Simon Martin Reich; Reich 2Department Geology Andean Geothermal Center Excellence (CEGA),...
We present a concerted international effort to cross‐calibrate five synthetic Th isotope reference materials (UCSC “A”, OU “U”, WUN, IRMM‐35 and IRMM‐36), six rock TML, Icelandic ATHO, USGS BCR‐2, W‐2, BHVO‐2, LV18) using multi‐collector inductively coupled plasma‐mass spectrometry (MC‐ICP‐MS). then compare our new values with compilation of literature mass spectrometric data for these derive recommended “consensus” 230 Th/ 232 each. also dilution U concentration four W‐2).
Research Article| April 01, 2016 Silicic Magmatism and the Volcanic–Plutonic Connection Craig C. Lundstrom; Lundstrom 1Department of Geology, University Illinois Urbana ChampaignChampaign, IL 61820, USAE-mail: lundstro@illinois.edu Search for other works by this author on: GSW Google Scholar Allen F. Glazner 2Department Geological Sciences, North CarolinaChapel Hill, NC 27599, afg@unc.edu Author Article Information Publisher: Mineralogical Society America First Online: 09 Mar 2017 Online...
The chemical composition of mid-ocean ridge basalt, the most prevalent magma type on planet, reflects melt's continuous reequilibration with surrounding mantle during porous flow. Models basalt extraction that account for observed uranium-series disequilibria Juan de Fuca constrain both abundance melt beneath ridges (0.1 to 0.2 percent) and style melting. Unlike models incorporate near-fractional melts (dynamic melting), mixing equilibrium flow derived from heterogeneous source materials...
Research Article| July 01, 2009 Variations in 238U/235U uranium ore deposits: Isotopic signatures of the U reduction process? Charles John Bopp, IV; IV 1University Illinois at Urbana-Champaign, Department Geology, 245 Natural History Building, 1301 West Green Street, Urbana, 61801, USA Search for other works by this author on: GSW Google Scholar Craig C. Lundstrom; Lundstrom Thomas M. Johnson; Johnson Justin J.G. Glessner Author and Article Information Publisher: Geological Society America...
The attenuation of groundwater contamination via chemical reaction is traditionally evaluated by monitoring contaminant concentration through time. However, this method can be confounded common transport processes (e.g., dilution, sorption). Isotopic techniques bypass the limits methods, and so may provide improved accuracy in determining extent reaction. We apply measurements 238U/235U to a U bioremediation field experiment at Rifle Integrated Field Research Challenge Site Rifle, Colorado....
We have carried out nuclear resonant scattering measurements on 57 Fe‐enriched Fe 3 C between 1 bar and 50 GPa at 300 K. Synchrotron Mössbauer spectra reveal a pressure‐induced magnetic transition in 4.3 6.5 GPa. On the basis of our inelastic X‐ray existing equation‐of‐state data, we derived compressional wave velocity V P shear S for high‐pressure nonmagnetic phase, which can be expressed as functions density ( ρ ): (km/s) = −3.99 + 1.29 (g/cm ) 1.45 0.24 ). The addition carbon to...
Isotopes fractionate in thermal gradients, but there is little quantitative understanding of this effect complex fluids. Here we present results experiments and molecular dynamics simulations on silicate melts. We show that isotope fractionation arises from classical mechanical effects, a scaling relation based Chapman-Enskog theory predicts the behavior seen fluids without arbitrary fitting parameters. The analysis reveals network forming elements (Si O) significantly less than modifiers...