Philip L Verplanck
Philip Verplanck is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
Filter Total Items: 80
Links between climate change, water-table depth, and water chemistry in a mineralized mountain watershed
Recent studies suggest that climate change is causing rising solute concentrations in mountain lakes and streams. These changes may be more pronounced in mineralized watersheds due to the sensitivity of sulfide weathering to changes in subsurface oxygen transport. Specific causal mechanisms linking climate change and accelerated weathering rates have been proposed, but in general remain entirely h
Authors
Andrew H. Manning, Philip L. Verplanck, Jonathan S. Caine, Andrew S. Todd
Estimating instream constituent loads using replicate synoptic sampling, Peru Creek, Colorado
The synoptic mass balance approach is often used to evaluate constituent mass loading in streams affected by mine drainage. Spatial profiles of constituent mass load are used to identify sources of contamination and prioritize sites for remedial action. This paper presents a field scale study in which replicate synoptic sampling campaigns are used to quantify the aggregate uncertainty in constitue
Authors
Robert L. Runkel, Katherine Walton-Day, Briant A. Kimball, Philip L. Verplanck, David A. Nimick
Evaluating remedial alternatives for an acid mine drainage stream: A model post audit
A post audit for a reactive transport model used to evaluate acid mine drainage treatment systems is presented herein. The post audit is based on a paired synoptic approach in which hydrogeochemical data are collected at low (existing conditions) and elevated (following treatment) pH. Data obtained under existing, low-pH conditions are used for calibration, and the resultant model is used to predi
Authors
Robert L. Runkel, Briant A. Kimball, Katherine Walton-Day, Philip L. Verplanck, Robert E. Broshears
Geospatial database for regional environmental assessment of central Colorado.
In conjunction with the future planning needs of the U.S. Department of Agriculture, Forest Service, the U.S. Geological Survey conducted a detailed environmental assessment of the effects of historical mining on Forest Service lands in central Colorado. Stream sediment, macroinvertebrate, and various filtered and unfiltered water quality samples were collected during low-flow over a four-year per
Authors
Stan E. Church, Carma A. San Juan, David L. Fey, Travis S. Schmidt, Terry L. Klein, Ed H. DeWitt, Richard B. Wanty, Philip L. Verplanck, Katharine A. Mitchell, Monique G. Adams, LaDonna M. Choate, Todor I. Todorov, Barnaby W. Rockwell, Luke McEachron, Michael W. Anthony
Geologic processes influence the effects of mining on aquatic ecosystems
Geologic processes strongly influence water and sediment quality in aquatic ecosystems but rarely are geologic principles incorporated into routine biomonitoring studies. We test if elevated concentrations of metals in water and sediment are restricted to streams downstream of mines or areas that may discharge mine wastes. We surveyed 198 catchments classified as “historically mined” or “unmined,”
Authors
Travis S. Schmidt, William H. Clements, Richard B. Wanty, Philip L. Verplanck, Stan E. Church, Carma A. San Juan, David L. Fey, Barnaby W. Rockwell, Ed H. DeWitt, Terry L. Klein
Climate-change-driven deterioration of water quality in a mineralized watershed
A unique 30-year streamwater chemistry data set from a mineralized alpine watershed with naturally acidic, metal-rich water displays dissolved concentrations of Zn and other metals of ecological concern increasing by 100–400% (400–2000 μg/L) during low-flow months, when metal concentrations are highest. SO4 and other major ions show similar increases. A lack of natural or anthropogenic land distur
Authors
Andrew Todd, Andrew H. Manning, Philip L. Verplanck, Caitlin Crouch, Diane M. McKnight, Ryan Dunham
Carbonatite and alkaline intrusion-related rare earth element deposits–A deposit model
The rare earth elements are not as rare in nature as their name implies, but economic deposits with these elements are not common and few deposits have been large producers. In the past 25 years, demand for rare earth elements has increased dramatically because of their wide and diverse use in high-technology applications. Yet, presently the global production and supply of rare earth elements come
Authors
Philip L. Verplanck, Bradley S. Van Gosen
Spring runoff water-chemistry data from the Standard Mine and Elk Creek, Gunnison County, Colorado, 2010
Water samples were collected approximately every two weeks during the spring of 2010 from the Level 1 portal of the Standard Mine and from two locations on Elk Creek. The objective of the sampling was to: (1) better define the expected range and timing of variations in pH and metal concentrations in Level 1 discharge and Elk Creek during spring runoff; and (2) further evaluate possible mechanisms
Authors
Andrew H. Manning, Philip L. Verplanck, M. Alisa Mast, Joseph Marsik, R. Blaine McCleskey
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 conditions as well
Authors
L. B. Barber, Ronald C. Antweiler, J.L. Flynn, S.H. Keefe, D.W. Kolpin, D.A. Roth, D.J. Schnoebelen, Howard E. Taylor, P. L. Verplanck
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 visit was m
Authors
Richard I. Grauch, Philip L. Verplanck, Cheryl M. Seeger, James R. Budahn, Bradley S. Van Gosen
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 gadolinium
Authors
Philip L. Verplanck, Edward T. Furlong, James L. Gray, Patrick J. Phillips, Ruth E. Wolf, Kathleen Esposito
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 anthropogenic, and sim
Authors
Briant A. Kimball, Robert L. Runkel, Richard B. Wanty, Philip L. Verplanck
Science and Products
Filter Total Items: 80
Links between climate change, water-table depth, and water chemistry in a mineralized mountain watershed
Recent studies suggest that climate change is causing rising solute concentrations in mountain lakes and streams. These changes may be more pronounced in mineralized watersheds due to the sensitivity of sulfide weathering to changes in subsurface oxygen transport. Specific causal mechanisms linking climate change and accelerated weathering rates have been proposed, but in general remain entirely h
Authors
Andrew H. Manning, Philip L. Verplanck, Jonathan S. Caine, Andrew S. Todd
Estimating instream constituent loads using replicate synoptic sampling, Peru Creek, Colorado
The synoptic mass balance approach is often used to evaluate constituent mass loading in streams affected by mine drainage. Spatial profiles of constituent mass load are used to identify sources of contamination and prioritize sites for remedial action. This paper presents a field scale study in which replicate synoptic sampling campaigns are used to quantify the aggregate uncertainty in constitue
Authors
Robert L. Runkel, Katherine Walton-Day, Briant A. Kimball, Philip L. Verplanck, David A. Nimick
Evaluating remedial alternatives for an acid mine drainage stream: A model post audit
A post audit for a reactive transport model used to evaluate acid mine drainage treatment systems is presented herein. The post audit is based on a paired synoptic approach in which hydrogeochemical data are collected at low (existing conditions) and elevated (following treatment) pH. Data obtained under existing, low-pH conditions are used for calibration, and the resultant model is used to predi
Authors
Robert L. Runkel, Briant A. Kimball, Katherine Walton-Day, Philip L. Verplanck, Robert E. Broshears
Geospatial database for regional environmental assessment of central Colorado.
In conjunction with the future planning needs of the U.S. Department of Agriculture, Forest Service, the U.S. Geological Survey conducted a detailed environmental assessment of the effects of historical mining on Forest Service lands in central Colorado. Stream sediment, macroinvertebrate, and various filtered and unfiltered water quality samples were collected during low-flow over a four-year per
Authors
Stan E. Church, Carma A. San Juan, David L. Fey, Travis S. Schmidt, Terry L. Klein, Ed H. DeWitt, Richard B. Wanty, Philip L. Verplanck, Katharine A. Mitchell, Monique G. Adams, LaDonna M. Choate, Todor I. Todorov, Barnaby W. Rockwell, Luke McEachron, Michael W. Anthony
Geologic processes influence the effects of mining on aquatic ecosystems
Geologic processes strongly influence water and sediment quality in aquatic ecosystems but rarely are geologic principles incorporated into routine biomonitoring studies. We test if elevated concentrations of metals in water and sediment are restricted to streams downstream of mines or areas that may discharge mine wastes. We surveyed 198 catchments classified as “historically mined” or “unmined,”
Authors
Travis S. Schmidt, William H. Clements, Richard B. Wanty, Philip L. Verplanck, Stan E. Church, Carma A. San Juan, David L. Fey, Barnaby W. Rockwell, Ed H. DeWitt, Terry L. Klein
Climate-change-driven deterioration of water quality in a mineralized watershed
A unique 30-year streamwater chemistry data set from a mineralized alpine watershed with naturally acidic, metal-rich water displays dissolved concentrations of Zn and other metals of ecological concern increasing by 100–400% (400–2000 μg/L) during low-flow months, when metal concentrations are highest. SO4 and other major ions show similar increases. A lack of natural or anthropogenic land distur
Authors
Andrew Todd, Andrew H. Manning, Philip L. Verplanck, Caitlin Crouch, Diane M. McKnight, Ryan Dunham
Carbonatite and alkaline intrusion-related rare earth element deposits–A deposit model
The rare earth elements are not as rare in nature as their name implies, but economic deposits with these elements are not common and few deposits have been large producers. In the past 25 years, demand for rare earth elements has increased dramatically because of their wide and diverse use in high-technology applications. Yet, presently the global production and supply of rare earth elements come
Authors
Philip L. Verplanck, Bradley S. Van Gosen
Spring runoff water-chemistry data from the Standard Mine and Elk Creek, Gunnison County, Colorado, 2010
Water samples were collected approximately every two weeks during the spring of 2010 from the Level 1 portal of the Standard Mine and from two locations on Elk Creek. The objective of the sampling was to: (1) better define the expected range and timing of variations in pH and metal concentrations in Level 1 discharge and Elk Creek during spring runoff; and (2) further evaluate possible mechanisms
Authors
Andrew H. Manning, Philip L. Verplanck, M. Alisa Mast, Joseph Marsik, R. Blaine McCleskey
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 conditions as well
Authors
L. B. Barber, Ronald C. Antweiler, J.L. Flynn, S.H. Keefe, D.W. Kolpin, D.A. Roth, D.J. Schnoebelen, Howard E. Taylor, P. L. Verplanck
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 visit was m
Authors
Richard I. Grauch, Philip L. Verplanck, Cheryl M. Seeger, James R. Budahn, Bradley S. Van Gosen
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 gadolinium
Authors
Philip L. Verplanck, Edward T. Furlong, James L. Gray, Patrick J. Phillips, Ruth E. Wolf, Kathleen Esposito
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 anthropogenic, and sim
Authors
Briant A. Kimball, Robert L. Runkel, Richard B. Wanty, Philip L. Verplanck