Geological Sciences
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Recommended nomenclature of epidote-group minerals
(GeoScience World, 2006)Epidote-group minerals are monoclinic in symmetry and have topology consistent with space group P21/m and the general formula A2M3[T2O7][TO4](O,F)(OH,O). Zoisite is an orthorhombic polymorph of clinozoisite Ca2Al3[Si2O7] ... -
Widespread Archean basement beneath the Yangtze craton
(GeoScience World, 2006)The age distribution of the crust is a fundamental parameter in modeling continental evolution and the rate of crustal accretion through Earth’s history, but this is usually estimated from surface exposures. The exposed ... -
Equilibrium shapes of two and three dimensional two-phase rotating fluid drops with surface tension: effects of inner drop displacement
(American Institute of Physics, 2022-11-01)The shapes of rotating fluid drops held together by surface tension is an important field of study in fluid mechanics. Recently, experiments with micron-scale droplets of liquid helium have been undertaken and it has ... -
Trace element-mineral associations in modern and ancient iron terraces in acid drainage environments
(Elsevier, 2016-07-31)Iron-rich sediments commonly cover riverbeds that have been affected by acid drainage associated with sulfide-mineral oxidation. Freshly-formed precipitates correspond to poorly-crystalline oxyhydroxysulfates that recrystallize ... -
Influence of As(V) on precipitation and transformation of schwertmannite in acid mine drainage-impacted waters
(Schweizerbart science publishers, 2018-12-07)Iron-rich sediments commonly cover riverbeds affected by acid mine drainage (AMD). Initial precipitates are often dominated by schwertmannite, which has an exceptionally high capacity to sequester As and other toxic elements. ... -
X-ray absorption spectroscopy and X-ray diffraction data for molybdenum minerals and compounds
(Elsevier, 2022-09-13)We report Mo K- and LIII-edge X-ray absorption spectroscopy (XAS) and X-ray diffraction (XRD) data collected for 15 molybdenum minerals and compounds sourced from museum collections, mineral dealers, and chemical suppliers. ... -
Repartitioning of co-precipitated Mo(VI) during Fe(II) and S(-II) driven ferrihydrite transformation
(Elsevier, 2022-08-29)Molybdenum is an essential element for most biological systems. Biosynthesis of Mo-enzymes that support global biogeochemical cycles of N, C, and S depends upon bioavailable molybdate (MoO42−). Interactions with Fe(III) ... -
Geochemical characteristics of oil sands fluid petroleum coke
(Elsevier, 2016-11-30)The geochemical characteristics of fluid petroleum coke from an oil sands mine in the Athabasca Oil Sands Region (AOSR) of northern Alberta, Canada were investigated. Continuous core samples were collected to 8 m below ... -
Aqueous- and solid-phase molybdenum geochemistry of oil sands fluid petroleum coke deposits, Alberta, Canada
(Elsevier, 2018-11-12)Fluid petroleum coke generated at oil sands operations in the Athabasca Oil Sands Region of northern Alberta, Canada, contains elevated concentrations of molybdenum (Mo) and other metals including nickel (Ni) and vanadium ... -
Mineralogy and geochemistry of oil sands froth treatment tailings: Implications for acid generation and metal(loid) release
(Elsevier, 2019-02-04)Froth treatment tailings (FTT) are one of three principal tailings streams generated during bitumen extraction at oil sands mines in northern Alberta, Canada. Unlike the coarse tailings and fluid fine tailings, FTT are ... -
Aqueous vanadate removal by iron(II)-bearing phases under anoxic conditions
(American Chemical Society (ACS) Publications, 2020-03-06)Vanadium contamination is a growing environmental hazard worldwide. Aqueous vanadate (HxVVO4(3−x)− (aq)) concentrations are often controlled by surface complexation with metal (oxyhydr)oxides in oxic environments. However, ... -
Adsorption of (Poly)vanadate onto Ferrihydrite and Hematite: An In Situ ATR–FTIR Study
(American Chemical Society (ACS) Publications, 2020-03-25)Vanadium (V) has been a useful trace metal in describing Earth’s biogeochemical cycling and development of industrial processes; however, V has recently been recognized as a potential contaminant of concern. Although Fe ... -
Structural Incorporation of Sorbed Molybdate during Iron(II)-Induced Transformation of Ferrihydrite and Goethite under Advective Flow Conditions
(American Chemical Society (ACS) Publications, 2020-06-08)Aqueous Fe(II) can induce recrystallization of ferrihydrite and goethite [α‑FeOOH] to their more crystalline or molecularly homogenous counterparts. Despite common association with these and other Fe(III) (oxyhydr)oxides, ... -
Molybdenum(VI) sequestration mechanisms during iron(II)-induced ferrihydrite transformation
(American Chemical Society (ACS) Publications, 2021-08-04)Adsorption and coprecipitation reactions with Fe(III) (oxyhydr)oxides contribute to Mo(VI) attenuation within geohydrologic systems. Redox transitions within these systems can promote transformation of metastable phases, ... -
Ebullition enhances chemical mass transport across the tailings-water interface of oil sands pit lakes
(Elsevier, 2021-12-09)Base Mine Lake (BML) was the first commercial-scale demonstration oil sands pit lake established in northern Alberta, Canada. Recent studies indicate that ebullition enhances internal mass loading of dissolved constituents ... -
Geochemical conditions influence vanadium, nickel, and molybdenum release from oil sands fluid petroleum coke
(Elsevier, 2022-01-07)Petroleum coke is a potential source of vanadium (V), nickel (Ni), and molybdenum (Mo) to water resources in Athabasca Oil Sands Region (AOSR) of northern Alberta, Canada. Large stockpiles of this bitumen upgrading byproduct ... -
Acidic microenvironments in waste rock characterized by neutral drainage: Bacteria-mineral interactions at sulfide surfaces
(MDPI, 2014-03-21)Microbial populations and microbe-mineral interactions were examined in waste rock characterized by neutral rock drainage (NRD). Samples of three primary sulfide-bearing waste rock types (i.e., marble-hornfels, intrusive, ... -
Sodium transport and attenuation in soil cover materials for oil sands mine reclamation
(Elsevier, 2018-11-03)Reclamation soil covers are used in oil sands mine closure to support vegetative growth over tailings. Geochemical processes within these covers may impact solute transport during upward migration of oil sands process-affected ... -
Variability in timing and transport of Pleistocene meltwater recharge to regional aquifers
(American Geophysical Union (AGU), 2021-10-07)The impacts of Pleistocene glaciation on groundwater flow systems in sedimentary basins are widely recognized, but the timing and distribution of subglacial recharge events remain poorly constrained. We investigate the ... -
Isotopic and chemical assessment of the dynamics of methane sources and microbial cycling during early development of an oil sands pit lake
(MDPI, 2021-12-03)Water-capped tailings technology (WCTT) is a key component of the reclamation strategies in the Athabasca oil sands region (AOSR) of northeastern Alberta, Canada. The release of microbial methane from tailings emplaced ...
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