Philip L Verplanck
Philip Verplanck is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
Filter Total Items: 84
Aqueous stability of gadolinium in surface waters receiving sewage treatment plant effluent Boulder Creek, Colorado Aqueous stability of gadolinium in surface waters receiving sewage treatment plant effluent Boulder Creek, Colorado
In many surface waters, sewage treatment plant (STP) effluent is a substantial source of both regulated and unregulated contaminants, including a suite of complex organic compounds derived from household chemicals, pharmaceutical, and industrial and medical byproducts. In addition, STP effluents in some urban areas have also been shown to have a positive gadolinium (Gd) anomaly in the...
Authors
P. L. Verplanck, Howard Taylor, D. Nordstrom, L. Barber
Rare earth element partitioning between hydrous ferric oxides and acid mine water during iron oxidation Rare earth element partitioning between hydrous ferric oxides and acid mine water during iron oxidation
Ferrous iron rapidly oxidizes to Fe (III) and precipitates as hydrous Fe (III) oxides in acid mine waters. This study examines the effect of Fe precipitation on the rare earth element(REE) geochemistry of acid mine waters to determine the pH range over which REEs behave conservatively and the range over which attenuation and fractionation occur. Two field studies were designed to...
Authors
P. L. Verplanck, D. Nordstrom, Howard Taylor, B. Kimball
Questa baseline and pre-mining ground-water quality investigation. 2. Low-flow (2001) and snowmelt (2002) synoptic/tracer water chemistry for the Red River, New Mexico Questa baseline and pre-mining ground-water quality investigation. 2. Low-flow (2001) and snowmelt (2002) synoptic/tracer water chemistry for the Red River, New Mexico
Water analyses are reported for 259 samples collected from the Red River, New Mexico, and its tributaries during low-flow(2001) and spring snowmelt (2002) tracer studies. Water samples were collected along a 20-kilometer reach of the Red River beginning just east of the town of Red River and ending at the U.S. Geological Survey streamflow-gaging station located east of Questa, New Mexico...
Authors
R. McCleskey, D. Nordstrom, Judy Steiger, Briant Kimball, Philip Verplanck
Comprehensive water quality of the Boulder Creek Watershed, Colorado, during high-flow and low-flow conditions, 2000 Comprehensive water quality of the Boulder Creek Watershed, Colorado, during high-flow and low-flow conditions, 2000
Executive Summary The Boulder Creek Watershed, Colorado, is 1160 square kilometers in area and ranges in elevation from 1480 to 4120 meters above sea level. Streamflow originates primarily as snowmelt near the Continental Divide, and thus discharge varies seasonally and annually (Chapter 1). Most of the water in Boulder Creek is diverted for domestic, agricultural, and industrial use...
Water quality of the Boulder Creek watershed, Colorado Water quality of the Boulder Creek watershed, Colorado
No abstract available.
Authors
Philip Verplanck, Sheila Murphy, Larry Barber
Chemical analyses of ground and surface waters, Ester Dome, central Alaska, 2000-2001 Chemical analyses of ground and surface waters, Ester Dome, central Alaska, 2000-2001
Water analyses are reported for ground and surface waters collected at 33 sites on and near Ester Dome, Fairbanks area, central Alaska during 2000-2001. This interdisciplinary study focused on documenting the temporal and spatial chemical variations in arsenic concentrations to elucidate the processes that lead to elevated arsenic concentrations in ground water. Field parameters and...
Authors
P. L. Verplanck, S. Mueller, E. Youcha, R.J. Goldfarb, R. Sanzolone, R. McCleskey, Paul H. Briggs, M. Roller, M. Adams, D. Nordstrom
Water-chemistry data for selected springs, geysers, and streams in Yellowstone National Park, Wyoming, 1999-2000 Water-chemistry data for selected springs, geysers, and streams in Yellowstone National Park, Wyoming, 1999-2000
Sixty-seven water analyses are reported for samples collected from 44 hot springs and their overflow drainages and two ambient-temperature acid streams in Yellowstone National Park (YNP) during 1990-2000. Thirty-seven analyses are reported for 1999, 18 for June of 2000, and 12 for September of 2000. These water samples were collected and analyzed as part of research investigations in YNP...
Authors
James Ball, R. McCleskey, D. Nordstrom, JoAnn Holloway, Philip Verplanck, Sabin Sturtevant
Evaluation of strontium isotopes as a geochemical tracer in the middle Fork Mineral Creek basin, southwestern Colorado Evaluation of strontium isotopes as a geochemical tracer in the middle Fork Mineral Creek basin, southwestern Colorado
No abstract available.
Authors
P. L. Verplanck, D.M. Unruh, D.L. Fey
Ground-water studies in Fairbanks, Alaska: A better understanding of some of the United States' highest natural arsenic concentrations Ground-water studies in Fairbanks, Alaska: A better understanding of some of the United States' highest natural arsenic concentrations
No abstract available.
Authors
Seth Mueller, Rich Goldfarb, Philip Verplanck
Standard reference water samples for rare earth element determinations Standard reference water samples for rare earth element determinations
Standard reference water samples (SRWS) were collected from two mine sites, one near Ophir, CO, USA and the other near Redding, CA, USA. The samples were filtered, preserved, and analyzed for rare earth element (REE) concentrations (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) by inductively coupled plasma-mass spectrometry (ICP-MS). These two samples were acid mine waters...
Authors
P. L. Verplanck, Ronald Antweiler, D. Nordstrom, Howard Taylor
Geochemical investigations by the U.S. Geological Survey on uranium mining, milling, and environmental restoration Geochemical investigations by the U.S. Geological Survey on uranium mining, milling, and environmental restoration
Recent research by the U.S. Geological Survey has characterized contaminant sources and identified important geochemical processes that influence transport of radionuclides from uranium mining and milling wastes. 1) Selective extraction studies indicated that alkaline earth sulfates and hydrous ferric oxides are important hosts of 226Ra in uranium mill tailings. The action of sulfate...
Authors
Edward Landa, Charles A. Cravotta, David Naftz, Philip Verplanck, D. Nordstrom, Robert Zielinski
The chemical and isotopic differentiation of an epizonal magma body: Organ Needle pluton, New Mexico The chemical and isotopic differentiation of an epizonal magma body: Organ Needle pluton, New Mexico
Major and trace element, and Nd and Sr isotopic compositions of whole rocks and mineral separates from the Oligocene, alkaline Organ Needle pluton (ONP), southern New Mexico, constrain models for the differentiation of the magma body parental to this compositionally zoned and layered epizonal intrusive body. The data reveal that the pluton is rimmed by lower εNd (∼ −5) and higher 87Sr...
Authors
P. L. Verplanck, G. Farmer, M. McCurry, S.A. Mertzman
Science and Products
Filter Total Items: 84
Aqueous stability of gadolinium in surface waters receiving sewage treatment plant effluent Boulder Creek, Colorado Aqueous stability of gadolinium in surface waters receiving sewage treatment plant effluent Boulder Creek, Colorado
In many surface waters, sewage treatment plant (STP) effluent is a substantial source of both regulated and unregulated contaminants, including a suite of complex organic compounds derived from household chemicals, pharmaceutical, and industrial and medical byproducts. In addition, STP effluents in some urban areas have also been shown to have a positive gadolinium (Gd) anomaly in the...
Authors
P. L. Verplanck, Howard Taylor, D. Nordstrom, L. Barber
Rare earth element partitioning between hydrous ferric oxides and acid mine water during iron oxidation Rare earth element partitioning between hydrous ferric oxides and acid mine water during iron oxidation
Ferrous iron rapidly oxidizes to Fe (III) and precipitates as hydrous Fe (III) oxides in acid mine waters. This study examines the effect of Fe precipitation on the rare earth element(REE) geochemistry of acid mine waters to determine the pH range over which REEs behave conservatively and the range over which attenuation and fractionation occur. Two field studies were designed to...
Authors
P. L. Verplanck, D. Nordstrom, Howard Taylor, B. Kimball
Questa baseline and pre-mining ground-water quality investigation. 2. Low-flow (2001) and snowmelt (2002) synoptic/tracer water chemistry for the Red River, New Mexico Questa baseline and pre-mining ground-water quality investigation. 2. Low-flow (2001) and snowmelt (2002) synoptic/tracer water chemistry for the Red River, New Mexico
Water analyses are reported for 259 samples collected from the Red River, New Mexico, and its tributaries during low-flow(2001) and spring snowmelt (2002) tracer studies. Water samples were collected along a 20-kilometer reach of the Red River beginning just east of the town of Red River and ending at the U.S. Geological Survey streamflow-gaging station located east of Questa, New Mexico...
Authors
R. McCleskey, D. Nordstrom, Judy Steiger, Briant Kimball, Philip Verplanck
Comprehensive water quality of the Boulder Creek Watershed, Colorado, during high-flow and low-flow conditions, 2000 Comprehensive water quality of the Boulder Creek Watershed, Colorado, during high-flow and low-flow conditions, 2000
Executive Summary The Boulder Creek Watershed, Colorado, is 1160 square kilometers in area and ranges in elevation from 1480 to 4120 meters above sea level. Streamflow originates primarily as snowmelt near the Continental Divide, and thus discharge varies seasonally and annually (Chapter 1). Most of the water in Boulder Creek is diverted for domestic, agricultural, and industrial use...
Water quality of the Boulder Creek watershed, Colorado Water quality of the Boulder Creek watershed, Colorado
No abstract available.
Authors
Philip Verplanck, Sheila Murphy, Larry Barber
Chemical analyses of ground and surface waters, Ester Dome, central Alaska, 2000-2001 Chemical analyses of ground and surface waters, Ester Dome, central Alaska, 2000-2001
Water analyses are reported for ground and surface waters collected at 33 sites on and near Ester Dome, Fairbanks area, central Alaska during 2000-2001. This interdisciplinary study focused on documenting the temporal and spatial chemical variations in arsenic concentrations to elucidate the processes that lead to elevated arsenic concentrations in ground water. Field parameters and...
Authors
P. L. Verplanck, S. Mueller, E. Youcha, R.J. Goldfarb, R. Sanzolone, R. McCleskey, Paul H. Briggs, M. Roller, M. Adams, D. Nordstrom
Water-chemistry data for selected springs, geysers, and streams in Yellowstone National Park, Wyoming, 1999-2000 Water-chemistry data for selected springs, geysers, and streams in Yellowstone National Park, Wyoming, 1999-2000
Sixty-seven water analyses are reported for samples collected from 44 hot springs and their overflow drainages and two ambient-temperature acid streams in Yellowstone National Park (YNP) during 1990-2000. Thirty-seven analyses are reported for 1999, 18 for June of 2000, and 12 for September of 2000. These water samples were collected and analyzed as part of research investigations in YNP...
Authors
James Ball, R. McCleskey, D. Nordstrom, JoAnn Holloway, Philip Verplanck, Sabin Sturtevant
Evaluation of strontium isotopes as a geochemical tracer in the middle Fork Mineral Creek basin, southwestern Colorado Evaluation of strontium isotopes as a geochemical tracer in the middle Fork Mineral Creek basin, southwestern Colorado
No abstract available.
Authors
P. L. Verplanck, D.M. Unruh, D.L. Fey
Ground-water studies in Fairbanks, Alaska: A better understanding of some of the United States' highest natural arsenic concentrations Ground-water studies in Fairbanks, Alaska: A better understanding of some of the United States' highest natural arsenic concentrations
No abstract available.
Authors
Seth Mueller, Rich Goldfarb, Philip Verplanck
Standard reference water samples for rare earth element determinations Standard reference water samples for rare earth element determinations
Standard reference water samples (SRWS) were collected from two mine sites, one near Ophir, CO, USA and the other near Redding, CA, USA. The samples were filtered, preserved, and analyzed for rare earth element (REE) concentrations (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) by inductively coupled plasma-mass spectrometry (ICP-MS). These two samples were acid mine waters...
Authors
P. L. Verplanck, Ronald Antweiler, D. Nordstrom, Howard Taylor
Geochemical investigations by the U.S. Geological Survey on uranium mining, milling, and environmental restoration Geochemical investigations by the U.S. Geological Survey on uranium mining, milling, and environmental restoration
Recent research by the U.S. Geological Survey has characterized contaminant sources and identified important geochemical processes that influence transport of radionuclides from uranium mining and milling wastes. 1) Selective extraction studies indicated that alkaline earth sulfates and hydrous ferric oxides are important hosts of 226Ra in uranium mill tailings. The action of sulfate...
Authors
Edward Landa, Charles A. Cravotta, David Naftz, Philip Verplanck, D. Nordstrom, Robert Zielinski
The chemical and isotopic differentiation of an epizonal magma body: Organ Needle pluton, New Mexico The chemical and isotopic differentiation of an epizonal magma body: Organ Needle pluton, New Mexico
Major and trace element, and Nd and Sr isotopic compositions of whole rocks and mineral separates from the Oligocene, alkaline Organ Needle pluton (ONP), southern New Mexico, constrain models for the differentiation of the magma body parental to this compositionally zoned and layered epizonal intrusive body. The data reveal that the pluton is rimmed by lower εNd (∼ −5) and higher 87Sr...
Authors
P. L. Verplanck, G. Farmer, M. McCurry, S.A. Mertzman