John Crusius (Former Employee)
Science and Products
Filter Total Items: 40
Tale of two pit lakes: initial results of a three-year study of the Main Zone and Waterline pit lakes near Houston, British Columbia, Canada Tale of two pit lakes: initial results of a three-year study of the Main Zone and Waterline pit lakes near Houston, British Columbia, Canada
Pit lakes are becoming increasingly common in North America as well as in the rest of the world. They are created as openpit mines fill passively with ground water and surface inflows on cessation of mining activity. In many instances, the water quality in these pit lakes does not meet regulatory requirements due to a number of influences. The most important are the oxidation of sulfide...
Authors
John Crusius, R. Pieters, A. Leung, P. Whittle, T. Pedersen, G. Lawrence, J.J. McNee
Mobility of authigenic rhenium, silver, and selenium during postdepositional oxidation in marine sediments Mobility of authigenic rhenium, silver, and selenium during postdepositional oxidation in marine sediments
Sedimentary records of redox-sensitive trace elements hold significant potential as indicators of paleoceanographic environmental conditions. Records of Re can reveal the intensity of past reducing conditions in sediments at the time of deposition, whereas records of Ag may record the magnitude of past diatom fluxes to the seafloor. Confidence in paleoenvironmental reconstruction from...
Authors
John Crusius, John Thomson
Gas transfer velocities measured at low wind speed over a lake Gas transfer velocities measured at low wind speed over a lake
The relationship between gas transfer velocity and wind speed was evaluated at low wind speeds by quantifying the rate of evasion of the deliberate tracer, SF6, from a small oligotrophic lake. Several possible relationships between gas transfer velocity and low wind speed were evaluated by using 1-min-averaged wind speeds as a measure of the instantaneous wind speed values. Gas transfer...
Authors
John Crusius, R. Wanninkhof
Post-Depositional Behavior of Cu in a Metal-Mining Polishing Pond (East Lake, Canada) Post-Depositional Behavior of Cu in a Metal-Mining Polishing Pond (East Lake, Canada)
The post-depositional behavior of Cu in a gold-mining polishing pond (East Lake, Canada) was assessed after mine closure by examination of porewater chemistry and mineralogy. The near-surface (upper 1.5 cm) sediments are enriched in Cu, with values ranging from 0.4 to 2 wt %. Mineralogical examination revealed that the bulk of the Cu inventory is present as authigenic copper sulfides...
Authors
A.J. Martin, J.L. Jambor, Thomas F. Pedersen, John Crusius
Science and Products
Filter Total Items: 40
Tale of two pit lakes: initial results of a three-year study of the Main Zone and Waterline pit lakes near Houston, British Columbia, Canada Tale of two pit lakes: initial results of a three-year study of the Main Zone and Waterline pit lakes near Houston, British Columbia, Canada
Pit lakes are becoming increasingly common in North America as well as in the rest of the world. They are created as openpit mines fill passively with ground water and surface inflows on cessation of mining activity. In many instances, the water quality in these pit lakes does not meet regulatory requirements due to a number of influences. The most important are the oxidation of sulfide...
Authors
John Crusius, R. Pieters, A. Leung, P. Whittle, T. Pedersen, G. Lawrence, J.J. McNee
Mobility of authigenic rhenium, silver, and selenium during postdepositional oxidation in marine sediments Mobility of authigenic rhenium, silver, and selenium during postdepositional oxidation in marine sediments
Sedimentary records of redox-sensitive trace elements hold significant potential as indicators of paleoceanographic environmental conditions. Records of Re can reveal the intensity of past reducing conditions in sediments at the time of deposition, whereas records of Ag may record the magnitude of past diatom fluxes to the seafloor. Confidence in paleoenvironmental reconstruction from...
Authors
John Crusius, John Thomson
Gas transfer velocities measured at low wind speed over a lake Gas transfer velocities measured at low wind speed over a lake
The relationship between gas transfer velocity and wind speed was evaluated at low wind speeds by quantifying the rate of evasion of the deliberate tracer, SF6, from a small oligotrophic lake. Several possible relationships between gas transfer velocity and low wind speed were evaluated by using 1-min-averaged wind speeds as a measure of the instantaneous wind speed values. Gas transfer...
Authors
John Crusius, R. Wanninkhof
Post-Depositional Behavior of Cu in a Metal-Mining Polishing Pond (East Lake, Canada) Post-Depositional Behavior of Cu in a Metal-Mining Polishing Pond (East Lake, Canada)
The post-depositional behavior of Cu in a gold-mining polishing pond (East Lake, Canada) was assessed after mine closure by examination of porewater chemistry and mineralogy. The near-surface (upper 1.5 cm) sediments are enriched in Cu, with values ranging from 0.4 to 2 wt %. Mineralogical examination revealed that the bulk of the Cu inventory is present as authigenic copper sulfides...
Authors
A.J. Martin, J.L. Jambor, Thomas F. Pedersen, John Crusius