Geological Sciences
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Long-term mineralogical and geochemical evolution of sulfide mine tailings under a shallow water cover
(Elsevier, 2015-06-01)The long-term influence of a shallow water cover limiting sulfide-mineral oxidation was examined in tailings deposited near the end of operation in 1951 of the former Sherritt-Gordon Zn-Cu mine (Sherridon, Manitoba, Canada). ... -
Initial geochemical characteristics of fluid fine tailings in an oil sands end pit lake
(Elsevier, 2016-06-15)Geochemical characteristics of fluid fine tailings (FFT) were examined in Base Mine Lake (BML), which is the first full-scale demonstration oil sands end pit lake (EPL) in northern Alberta, Canada. Approximately 186 M m3 ... -
Benchmarking multiphysics software for mantle convection
(Elsevier, 2021-09)Numerical simulations are a highly valuable tool for improving our understanding of mantle dynamics. COMSOL Multiphysics® is a commercial software suite designed to numerically model experiments featuring multiple branches ... -
Forward modeling of magnetotellurics using Comsol Multiphysics
(2021-12)Magnetotellurics is an electromagnetic geophysical method that has been widely used to study structures in Earth's subsurface. Numerical modeling of magnetotellurics is important for survey design, inversion, geological ... -
Simple formulas for pseudoposition for electrical resistivity and IP in vertical boreholes based on mean positions of the sensitivity
(Wiley, 2021-12)The electrical conductivity method in boreholes has been applied for exploration as well as engineering and environmental investigations. The simplest deployment involves placing electrodes at varying heights within a ... -
Tracing molybdenum attenuation in mining environments using molybdenum stable isotopes
(American Chemical Society, 2019-04-18)Molybdenum contamination is a concern in mining regions worldwide. Better understanding of processes controlling Mo mobility in mine wastes is critical for assessing potential impacts and developing water-quality management ... -
Selenate removal by zero-valent iron under anoxic conditions: effects of nitrate and sulfate
(Springer Nature, 2019-08-16)Batch experiments were conducted to examine aqueous Se(VI) removal by zero-valent iron (ZVI) under anoxic conditions in the presence and absence of NO3− and SO42−. Initial concentrations for Se(VI), SO4, and NO3–N of 5 mg ... -
Putative mixotrophic nitrifying-denitrifying Gammaproteobacteria implicated in nitrogen cycling within the ammonia/oxygen transition zone of an oil sands pit Lake
(Frontiers, 2019-10-24)Anthropogenically-impacted environments offer the opportunity to discover novel microbial species and metabolisms, which may be undetectable in natural systems. Here, a combined metagenomic and geochemical study in Base ... -
Vanadium geochemistry of oil sands fluid petroleum coke
(American Chemical Society, 2017-02-09)Vanadium has previously been linked to elevated toxicity of leachates derived from oil sands petroleum coke. However, geochemical controls on V mobility within coke deposits remain poorly constrained. Detailed examinations ... -
Geochemical and mineralogical aspects of sulfide mine tailings
(Elsevier, 2015-01-30)Tailings generated during processing of sulfide ores represent a substantial risk to water resources. The oxidation of sulfide minerals within tailings deposits can generate low-quality water containing elevated concentrations ... -
The persistence of brines in sedimentary basins
(American Geophysical Union, 2018-05-08)Brines are commonly found at depth in sedimentary basins. Many of these brines are known to be connate waters that have persisted since the early Paleozoic Era. Yet questions remain about their distribution and mechanisms ... -
Chemical mass transport between fluid fine tailings and the overlying water cover of an oil sands end pit lake
(American Geophysical Union, 2017-05-17)Fluid fine tailings (FFT) are a principal by-product of the bitumen extraction process at oil sands mines. Base Mine Lake (BML)—the first full-scale demonstration oil sands end pit lake (EPL)—contains approximately 1.9 3 ... -
Dissolved selenium(VI) removal by zero-valent iron under oxic conditions: Influence of sulfate and nitrate
(American Chemical Society, 2017-04-17)Dissolved Se(VI) removal by three commercially-available zero-valent irons (ZVIs) was examined in oxic batch experiments under circumneutral pH conditions in the presence and absence of NO3- and SO42-. Environmentally ... -
Nickel geochemistry of oil sands fluid petroleum coke deposits, Alberta, Canada
(Canadian Science Publishing, 2018-04-30)Nickel (Ni) leaching from oil sands petroleum coke can have toxicological effects on aquatic organisms. However, geochemical controls on Ni release, transport and attenuation within coke deposits remains limited. We examined ... -
Internal thermal boundary layer stability in phase transition modulated convection
(AGU, 1997-02)The stability of a horizontal thermal boundary layer embedded within a very viscous fluid is investigated using the formalism of linear stability analysis. Thin thermal boundary layers in deep fluid regions and in the ...
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