Philip L Verplanck
Philip Verplanck is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
Filter Total Items: 84
Lagrangian mass-flow investigations of inorganic contaminants in wastewater-impacted streams Lagrangian mass-flow investigations of inorganic contaminants in wastewater-impacted streams
Understanding the potential effects of increased reliance on wastewater treatment plant (WWTP) effluents to meet municipal, agricultural, and environmental flow requires an understanding of the complex chemical loading characteristics of the WWTPs and the assimilative capacity of receiving waters. Stream ecosystem effects are linked to proportions of WWTP effluent under low-flow...
Authors
L. Barber, Ronald Antweiler, J.L. Flynn, S.H. Keefe, D.W. Kolpin, D.A. Roth, D.J. Schnoebelen, Howard Taylor, P. L. Verplanck
Chemistry of selected core samples, concentrate, tailings, and tailings pond waters: Pea Ridge iron (-lanthanide-gold) deposit, Washington County, Missouri Chemistry of selected core samples, concentrate, tailings, and tailings pond waters: Pea Ridge iron (-lanthanide-gold) deposit, Washington County, Missouri
The Minerals at Risk and for Emerging Technologies Project of the U.S. Geological Survey (USGS) Mineral Resources Program is examining potential sources of lanthanide elements (rare earth elements) as part of its objective to provide up-to-date geologic information regarding mineral commodities likely to have increased demand in the near term. As part of the examination effort, a short...
Authors
Richard Grauch, Philip Verplanck, Cheryl Seeger, James Budahn, Bradley Van Gosen
Evaluating the behavior of gadolinium and other rare earth elements through large metropolitan sewage treatment plants Evaluating the behavior of gadolinium and other rare earth elements through large metropolitan sewage treatment plants
A primary pathway for emerging contaminants (pharmaceuticals, personal care products, steroids, and hormones) to enter aquatic ecosystems is effluent from sewage treatment plants (STP), and identifying technologies to minimize the amount of these contaminants released is important. Quantifying the flux of these contaminants through STPs is difficult. This study evaluates the behavior of...
Authors
Philip Verplanck, Edward Furlong, James Gray, Patrick Phillips, Ruth Wolf, Kathleen Esposito
Reactive solute-transport simulation of pre-mining metal concentrations in mine-impacted catchments: Redwell Basin, Colorado, USA Reactive solute-transport simulation of pre-mining metal concentrations in mine-impacted catchments: Redwell Basin, Colorado, USA
With the increased importance of water resources in the western United States and many areas worldwide, the remediation of impacts from historical mining becomes ever more important. A possible process of making decisions about remediation for a catchment might include identification of principal sources of metals in the catchment, classification of the sources as natural or...
Authors
Briant Kimball, Robert Runkel, Richard Wanty, Philip Verplanck
Reconnaissance of weathering rates in alpine catchments of central Colorado, USA Reconnaissance of weathering rates in alpine catchments of central Colorado, USA
No abstract available.
Authors
R.E. Wanty, P. L. Verplanck, C. Bern, T. Todoro, C. San Juan, E.H. deWitt, T. Klein, D. Fey, T.S. Schmidt, S. Church
Predicting risks to aquatic life based on lithologic specific geochemical baselines Predicting risks to aquatic life based on lithologic specific geochemical baselines
No abstract available.
Authors
Travis S. Schmidt, R. B. Wanty, P. L. Verplanck, S. Church, C. San Juan, D. Fey, B.W. Rockwell, E.H. deWitt, T. Klein
Development of a new toxic-unit model for the bioassessment of metals in streams Development of a new toxic-unit model for the bioassessment of metals in streams
Two toxic-unit models that estimate the toxicity of trace-metal mixtures to benthic communities were compared. The chronic criterion accumulation ratio (CCAR), a modification of biotic ligand model (BLM) outputs for use as a toxic-unit model, accounts for the modifying and competitive influences of major cations (Ca2+, Mg2+, Na+, K+, H+), anions (HCO3−, CO32−,SO42−, Cl−, S2−) and...
Authors
Travis S. Schmidt, W.H. Clements, K.A. Mitchell, Stanley Church, Richard Wanty, David Fey, Philip Verplanck, Carma San Juan
Estimating natural background groundwater chemistry, Questa molybdenum mine, New Mexico Estimating natural background groundwater chemistry, Questa molybdenum mine, New Mexico
This 2 1/2 day field trip will present an overview of a U.S. Geological Survey (USGS) project whose objective was to estimate pre-mining groundwater chemistry at the Questa molybdenum mine, New Mexico. Because of intense debate among stakeholders regarding pre-mining groundwater chemistry standards, the New Mexico Environment Department and Chevron Mining Inc. (formerly Molycorp) agreed...
Authors
Phillip Verplanck, D. Nordstrom, Geoffrey Plumlee, Bruce Walker
Questa Baseline and Pre-mining Ground-Water Quality Investigation, 7. A Pictorial Record of Chemical Weathering, Erosional Processes, and Potential Debris-flow Hazards in Scar Areas Developed on Hydrothermally Altered Rocks Questa Baseline and Pre-mining Ground-Water Quality Investigation, 7. A Pictorial Record of Chemical Weathering, Erosional Processes, and Potential Debris-flow Hazards in Scar Areas Developed on Hydrothermally Altered Rocks
Erosional scar areas developed along the lower Red River basin, New Mexico, reveal a complex natural history of mineralizing processes, rapid chemical weathering, and intense physical erosion during periodic outbursts of destructive, storm-induced runoff events. The scar areas are prominent erosional features with craggy headwalls and steep, denuded slopes. The largest scar areas...
Authors
Geoffrey Plumlee, Steve Ludington, Kirk Vincent, Philip Verplanck, Jonathan Caine, K. Eric Livo
Geochemistry of standard mine waters, Gunnison County, Colorado, July 2009 Geochemistry of standard mine waters, Gunnison County, Colorado, July 2009
In many hard-rock-mining districts water flowing from abandoned mine adits is a primary source of metals to receiving streams. Understanding the generation of adit discharge is an important step in developing remediation plans. In 2006, the U.S. Environmental Protection Agency listed the Standard Mine in the Elk Creek drainage basin near Crested Butte, Colorado as a superfund site...
Authors
Philip Verplanck, Andrew Manning, Jeffrey Graves, R. McCleskey, Todor Todorov, Paul Lamothe
U.S. Geological Survey research in Handcart Gulch, Colorado—An alpine watershed with natural acid-rock drainage U.S. Geological Survey research in Handcart Gulch, Colorado—An alpine watershed with natural acid-rock drainage
Handcart Gulch is an alpine watershed along the Continental Divide in the Colorado Rocky Mountain Front Range. It contains an unmined mineral deposit typical of many hydrothermal mineral deposits in the intermountain west, composed primarily of pyrite with trace metals including copper and molybdenum. Springs and the trunk stream have a natural pH value of 3 to 4. The U.S. Geological...
Authors
Andrew Manning, Jonathan Caine, Philip Verplanck, Dana Bove, Katherine G. Kahn
Naturally acidic surface and ground waters draining porphyry-related mineralized areas of the Southern Rocky Mountains, Colorado and New Mexico Naturally acidic surface and ground waters draining porphyry-related mineralized areas of the Southern Rocky Mountains, Colorado and New Mexico
Acidic, metal-rich waters produced by the oxidative weathering and resulting leaching of major and trace elements from pyritic rocks can adversely affect water quality in receiving streams and riparian ecosystems. Five study areas in the southern Rocky Mountains with naturally acidic waters associated with porphyry mineralization were studied to document variations in water chemistry and...
Authors
P. L. Verplanck, D. Nordstrom, D. Bove, G.S. Plumlee, R.L. Runkel
Science and Products
Filter Total Items: 84
Lagrangian mass-flow investigations of inorganic contaminants in wastewater-impacted streams Lagrangian mass-flow investigations of inorganic contaminants in wastewater-impacted streams
Understanding the potential effects of increased reliance on wastewater treatment plant (WWTP) effluents to meet municipal, agricultural, and environmental flow requires an understanding of the complex chemical loading characteristics of the WWTPs and the assimilative capacity of receiving waters. Stream ecosystem effects are linked to proportions of WWTP effluent under low-flow...
Authors
L. Barber, Ronald Antweiler, J.L. Flynn, S.H. Keefe, D.W. Kolpin, D.A. Roth, D.J. Schnoebelen, Howard Taylor, P. L. Verplanck
Chemistry of selected core samples, concentrate, tailings, and tailings pond waters: Pea Ridge iron (-lanthanide-gold) deposit, Washington County, Missouri Chemistry of selected core samples, concentrate, tailings, and tailings pond waters: Pea Ridge iron (-lanthanide-gold) deposit, Washington County, Missouri
The Minerals at Risk and for Emerging Technologies Project of the U.S. Geological Survey (USGS) Mineral Resources Program is examining potential sources of lanthanide elements (rare earth elements) as part of its objective to provide up-to-date geologic information regarding mineral commodities likely to have increased demand in the near term. As part of the examination effort, a short...
Authors
Richard Grauch, Philip Verplanck, Cheryl Seeger, James Budahn, Bradley Van Gosen
Evaluating the behavior of gadolinium and other rare earth elements through large metropolitan sewage treatment plants Evaluating the behavior of gadolinium and other rare earth elements through large metropolitan sewage treatment plants
A primary pathway for emerging contaminants (pharmaceuticals, personal care products, steroids, and hormones) to enter aquatic ecosystems is effluent from sewage treatment plants (STP), and identifying technologies to minimize the amount of these contaminants released is important. Quantifying the flux of these contaminants through STPs is difficult. This study evaluates the behavior of...
Authors
Philip Verplanck, Edward Furlong, James Gray, Patrick Phillips, Ruth Wolf, Kathleen Esposito
Reactive solute-transport simulation of pre-mining metal concentrations in mine-impacted catchments: Redwell Basin, Colorado, USA Reactive solute-transport simulation of pre-mining metal concentrations in mine-impacted catchments: Redwell Basin, Colorado, USA
With the increased importance of water resources in the western United States and many areas worldwide, the remediation of impacts from historical mining becomes ever more important. A possible process of making decisions about remediation for a catchment might include identification of principal sources of metals in the catchment, classification of the sources as natural or...
Authors
Briant Kimball, Robert Runkel, Richard Wanty, Philip Verplanck
Reconnaissance of weathering rates in alpine catchments of central Colorado, USA Reconnaissance of weathering rates in alpine catchments of central Colorado, USA
No abstract available.
Authors
R.E. Wanty, P. L. Verplanck, C. Bern, T. Todoro, C. San Juan, E.H. deWitt, T. Klein, D. Fey, T.S. Schmidt, S. Church
Predicting risks to aquatic life based on lithologic specific geochemical baselines Predicting risks to aquatic life based on lithologic specific geochemical baselines
No abstract available.
Authors
Travis S. Schmidt, R. B. Wanty, P. L. Verplanck, S. Church, C. San Juan, D. Fey, B.W. Rockwell, E.H. deWitt, T. Klein
Development of a new toxic-unit model for the bioassessment of metals in streams Development of a new toxic-unit model for the bioassessment of metals in streams
Two toxic-unit models that estimate the toxicity of trace-metal mixtures to benthic communities were compared. The chronic criterion accumulation ratio (CCAR), a modification of biotic ligand model (BLM) outputs for use as a toxic-unit model, accounts for the modifying and competitive influences of major cations (Ca2+, Mg2+, Na+, K+, H+), anions (HCO3−, CO32−,SO42−, Cl−, S2−) and...
Authors
Travis S. Schmidt, W.H. Clements, K.A. Mitchell, Stanley Church, Richard Wanty, David Fey, Philip Verplanck, Carma San Juan
Estimating natural background groundwater chemistry, Questa molybdenum mine, New Mexico Estimating natural background groundwater chemistry, Questa molybdenum mine, New Mexico
This 2 1/2 day field trip will present an overview of a U.S. Geological Survey (USGS) project whose objective was to estimate pre-mining groundwater chemistry at the Questa molybdenum mine, New Mexico. Because of intense debate among stakeholders regarding pre-mining groundwater chemistry standards, the New Mexico Environment Department and Chevron Mining Inc. (formerly Molycorp) agreed...
Authors
Phillip Verplanck, D. Nordstrom, Geoffrey Plumlee, Bruce Walker
Questa Baseline and Pre-mining Ground-Water Quality Investigation, 7. A Pictorial Record of Chemical Weathering, Erosional Processes, and Potential Debris-flow Hazards in Scar Areas Developed on Hydrothermally Altered Rocks Questa Baseline and Pre-mining Ground-Water Quality Investigation, 7. A Pictorial Record of Chemical Weathering, Erosional Processes, and Potential Debris-flow Hazards in Scar Areas Developed on Hydrothermally Altered Rocks
Erosional scar areas developed along the lower Red River basin, New Mexico, reveal a complex natural history of mineralizing processes, rapid chemical weathering, and intense physical erosion during periodic outbursts of destructive, storm-induced runoff events. The scar areas are prominent erosional features with craggy headwalls and steep, denuded slopes. The largest scar areas...
Authors
Geoffrey Plumlee, Steve Ludington, Kirk Vincent, Philip Verplanck, Jonathan Caine, K. Eric Livo
Geochemistry of standard mine waters, Gunnison County, Colorado, July 2009 Geochemistry of standard mine waters, Gunnison County, Colorado, July 2009
In many hard-rock-mining districts water flowing from abandoned mine adits is a primary source of metals to receiving streams. Understanding the generation of adit discharge is an important step in developing remediation plans. In 2006, the U.S. Environmental Protection Agency listed the Standard Mine in the Elk Creek drainage basin near Crested Butte, Colorado as a superfund site...
Authors
Philip Verplanck, Andrew Manning, Jeffrey Graves, R. McCleskey, Todor Todorov, Paul Lamothe
U.S. Geological Survey research in Handcart Gulch, Colorado—An alpine watershed with natural acid-rock drainage U.S. Geological Survey research in Handcart Gulch, Colorado—An alpine watershed with natural acid-rock drainage
Handcart Gulch is an alpine watershed along the Continental Divide in the Colorado Rocky Mountain Front Range. It contains an unmined mineral deposit typical of many hydrothermal mineral deposits in the intermountain west, composed primarily of pyrite with trace metals including copper and molybdenum. Springs and the trunk stream have a natural pH value of 3 to 4. The U.S. Geological...
Authors
Andrew Manning, Jonathan Caine, Philip Verplanck, Dana Bove, Katherine G. Kahn
Naturally acidic surface and ground waters draining porphyry-related mineralized areas of the Southern Rocky Mountains, Colorado and New Mexico Naturally acidic surface and ground waters draining porphyry-related mineralized areas of the Southern Rocky Mountains, Colorado and New Mexico
Acidic, metal-rich waters produced by the oxidative weathering and resulting leaching of major and trace elements from pyritic rocks can adversely affect water quality in receiving streams and riparian ecosystems. Five study areas in the southern Rocky Mountains with naturally acidic waters associated with porphyry mineralization were studied to document variations in water chemistry and...
Authors
P. L. Verplanck, D. Nordstrom, D. Bove, G.S. Plumlee, R.L. Runkel