Philip L Verplanck
Philip Verplanck is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
Filter Total Items: 80
Rare-earth elements
The rare-earth elements (REEs) are 15 elements that range in atomic number from 57 (lanthanum) to 71 (lutetium); they are commonly referred to as the “lanthanides.” Yttrium (atomic number 39) is also commonly regarded as an REE because it shares chemical and physical similarities and has affinities with the lanthanides. Although REEs are not rare in terms of average crustal abundance, the concentr
Authors
Bradley S. Van Gosen, Philip L. Verplanck, Robert R. Seal, Keith R. Long, Joseph Gambogi
Strontium isotopic systematics of mineralized and background water samples, Montezuma Mining District, Colorado
Surface and groundwater samples within the Montezuma mining district were sampled to evaluate the use of strontium isotopic compositions as signatures of different water types. Waters draining Precambrian metamorphic units had distinctly higher 87Sr/ 86Sr values (0.72893 to 0.73833) than waters draining Tertiaryage plutonic rocks (0.71064 and 0.71114). Waters draining mine workings along Tertiary-
Authors
Philip L. Verplanck, Robert L. Runkel
Rare earth element ore geology of carbonatites
For nearly 50 years, carbonatites have been the primary source of niobium and rare earth elements (REEs), in particular the light REEs, including La, Ce, Pr, and Nd. Carbonatites are a relatively rare type of igneous rock composed of greater than 50 vol % primary carbonate minerals, primarily calcite and/or dolomite, and contain the highest concentrations of REEs of any igneous rocks. Although the
Authors
Philip L. Verplanck, Anthony N. Mariano, Anthony Mariano
Lithium brines: A global perspective
Lithium is a critical and technologically important element that has widespread use, particularly in batteries for hybrid cars and portable electronic devices. Global demand for lithium has been on the rise since the mid-1900s and is projected to continue to increase. Lithium is found in three main deposit types: (1) pegmatites, (2) continental brines, and (3) hydrothermally altered clays. Contine
Authors
LeeAnn Munk, Scott Hynek, Dwight Bradley, David Boutt, Keith A. Labay, Hillary Jochens
The link between volcanism and plutonism in epizonal magma systems; high-precision U–Pb zircon geochronology from the Organ Mountains caldera and batholith, New Mexico
The Organ Mountains caldera and batholith expose the volcanic and epizonal plutonic record of an Eocene caldera complex. The caldera and batholith are well exposed, and extensive previous mapping and geochemical analyses have suggested a clear link between the volcanic and plutonic sections, making this an ideal location to study magmatic processes associated with caldera volcanism. Here we presen
Authors
Matthew Rioux, Lang Farmer, Samuel Bowring, Kathleen M. Wooton, Jeffrey M. Amato, Drew S. Coleman, Philip L. Verplanck
Introduction: Rare Earth and Critical Elements in Ore Deposits
No abstract available.
Authors
Philip L. Verplanck, Murray W. Hitzman
By-products of porphyry copper and molybdenum deposits
Porphyry Cu and porphyry Mo deposits are large to giant deposits ranging up to >20 and 1.6 Gt of ore, respectively, that supply about 60 and 95% of the world’s copper and molybdenum, as well as significant amounts of gold and silver. These deposits form from hydrothermal systems that affect 10s to >100 km3 of the upper crust and result in enormous mass redistribution and potential concentration of
Authors
David John, Ryan D. Taylor
From extreme pH to extreme temperature: An issue in honor of the geochemical contributions of Kirk Nordstrom, USGS hydrogeochemist
This special issue of Applied Geochemistry honors Dr. D. Kirk Nordstrom, and his influential career spent primarily at the U.S. Geological Survey (USGS). This issue does not herald his retirement or other significant career milestone, but serves as a recognition of the impact his work has had on the field of geochemistry in general. This special issue grew from a symposium in Kirk’s honor (affecti
Authors
Kate M. Campbell, Philip L. Verplanck, R. Blaine McCleskey, Charles N. Alpers
The rare-earth elements: Vital to modern technologies and lifestyles
Until recently, the rare-earth elements (REEs) were familiar to a relatively small number of people, such as chemists, geologists, specialized materials scientists, and engineers. In the 21st century, the REEs have gained visibility through many media outlets because of (1) the public has recognized the critical, specialized properties that REEs contribute to modern technology, as well as (2) Chin
Authors
Bradley S. Van Gosen, Philip L. Verplanck, Keith R. Long, Joseph Gambogi, Robert R. Seal
Deposit model for heavy-mineral sands in coastal environments
This report provides a descriptive model of heavy-mineral sands, which are sedimentary deposits of dense minerals that accumulate with sand, silt, and clay in coastal environments, locally forming economic concentrations of the heavy minerals. This deposit type is the main source of titanium feedstock for the titanium dioxide (TiO2) pigments industry, through recovery of the minerals ilmenite (Fe2
Authors
Bradley S. Van Gosen, David L. Fey, Anjana K. Shah, Philip L. Verplanck, Todd M. Hoefen
Quantifying biomineralization of zinc in the Rio Naracauli (Sardinia, Italy), using a tracer injection and synoptic sampling
Streams draining mined areas throughout the world commonly have high concentrations of Zn. Because Zn is not easily removed from stream water and because it can be toxic to aquatic organisms, its presence is a persistent problem. The discovery of biomineralization of Zn-bearing solids in the mine drainage of Rio Naracauli, in Sardinia, Italy, provides insights into strategies for removing Zn and i
Authors
Giovanni De Giudici, Richard B. Wanty, F. Podda, Briant A. Kimball, Philip L. Verplanck, P. Lattanzi, R. Cidu, D. Medas
A deposit model for carbonatite and peralkaline intrusion-related rare earth element deposits
Carbonatite and alkaline intrusive complexes, as well as their weathering products, are the primary sources of rare earth elements. A wide variety of other commodities have been exploited from carbonatites and alkaline igneous rocks including niobium, phosphate, titanium, vermiculite, barite, fluorite, copper, calcite, and zirconium. Other elements enriched in these deposits include manganese, str
Authors
Philip L. Verplanck, Bradley S. Van Gosen, Robert R. Seal, Anne E. McCafferty
Science and Products
Filter Total Items: 80
Rare-earth elements
The rare-earth elements (REEs) are 15 elements that range in atomic number from 57 (lanthanum) to 71 (lutetium); they are commonly referred to as the “lanthanides.” Yttrium (atomic number 39) is also commonly regarded as an REE because it shares chemical and physical similarities and has affinities with the lanthanides. Although REEs are not rare in terms of average crustal abundance, the concentr
Authors
Bradley S. Van Gosen, Philip L. Verplanck, Robert R. Seal, Keith R. Long, Joseph Gambogi
Strontium isotopic systematics of mineralized and background water samples, Montezuma Mining District, Colorado
Surface and groundwater samples within the Montezuma mining district were sampled to evaluate the use of strontium isotopic compositions as signatures of different water types. Waters draining Precambrian metamorphic units had distinctly higher 87Sr/ 86Sr values (0.72893 to 0.73833) than waters draining Tertiaryage plutonic rocks (0.71064 and 0.71114). Waters draining mine workings along Tertiary-
Authors
Philip L. Verplanck, Robert L. Runkel
Rare earth element ore geology of carbonatites
For nearly 50 years, carbonatites have been the primary source of niobium and rare earth elements (REEs), in particular the light REEs, including La, Ce, Pr, and Nd. Carbonatites are a relatively rare type of igneous rock composed of greater than 50 vol % primary carbonate minerals, primarily calcite and/or dolomite, and contain the highest concentrations of REEs of any igneous rocks. Although the
Authors
Philip L. Verplanck, Anthony N. Mariano, Anthony Mariano
Lithium brines: A global perspective
Lithium is a critical and technologically important element that has widespread use, particularly in batteries for hybrid cars and portable electronic devices. Global demand for lithium has been on the rise since the mid-1900s and is projected to continue to increase. Lithium is found in three main deposit types: (1) pegmatites, (2) continental brines, and (3) hydrothermally altered clays. Contine
Authors
LeeAnn Munk, Scott Hynek, Dwight Bradley, David Boutt, Keith A. Labay, Hillary Jochens
The link between volcanism and plutonism in epizonal magma systems; high-precision U–Pb zircon geochronology from the Organ Mountains caldera and batholith, New Mexico
The Organ Mountains caldera and batholith expose the volcanic and epizonal plutonic record of an Eocene caldera complex. The caldera and batholith are well exposed, and extensive previous mapping and geochemical analyses have suggested a clear link between the volcanic and plutonic sections, making this an ideal location to study magmatic processes associated with caldera volcanism. Here we presen
Authors
Matthew Rioux, Lang Farmer, Samuel Bowring, Kathleen M. Wooton, Jeffrey M. Amato, Drew S. Coleman, Philip L. Verplanck
Introduction: Rare Earth and Critical Elements in Ore Deposits
No abstract available.
Authors
Philip L. Verplanck, Murray W. Hitzman
By-products of porphyry copper and molybdenum deposits
Porphyry Cu and porphyry Mo deposits are large to giant deposits ranging up to >20 and 1.6 Gt of ore, respectively, that supply about 60 and 95% of the world’s copper and molybdenum, as well as significant amounts of gold and silver. These deposits form from hydrothermal systems that affect 10s to >100 km3 of the upper crust and result in enormous mass redistribution and potential concentration of
Authors
David John, Ryan D. Taylor
From extreme pH to extreme temperature: An issue in honor of the geochemical contributions of Kirk Nordstrom, USGS hydrogeochemist
This special issue of Applied Geochemistry honors Dr. D. Kirk Nordstrom, and his influential career spent primarily at the U.S. Geological Survey (USGS). This issue does not herald his retirement or other significant career milestone, but serves as a recognition of the impact his work has had on the field of geochemistry in general. This special issue grew from a symposium in Kirk’s honor (affecti
Authors
Kate M. Campbell, Philip L. Verplanck, R. Blaine McCleskey, Charles N. Alpers
The rare-earth elements: Vital to modern technologies and lifestyles
Until recently, the rare-earth elements (REEs) were familiar to a relatively small number of people, such as chemists, geologists, specialized materials scientists, and engineers. In the 21st century, the REEs have gained visibility through many media outlets because of (1) the public has recognized the critical, specialized properties that REEs contribute to modern technology, as well as (2) Chin
Authors
Bradley S. Van Gosen, Philip L. Verplanck, Keith R. Long, Joseph Gambogi, Robert R. Seal
Deposit model for heavy-mineral sands in coastal environments
This report provides a descriptive model of heavy-mineral sands, which are sedimentary deposits of dense minerals that accumulate with sand, silt, and clay in coastal environments, locally forming economic concentrations of the heavy minerals. This deposit type is the main source of titanium feedstock for the titanium dioxide (TiO2) pigments industry, through recovery of the minerals ilmenite (Fe2
Authors
Bradley S. Van Gosen, David L. Fey, Anjana K. Shah, Philip L. Verplanck, Todd M. Hoefen
Quantifying biomineralization of zinc in the Rio Naracauli (Sardinia, Italy), using a tracer injection and synoptic sampling
Streams draining mined areas throughout the world commonly have high concentrations of Zn. Because Zn is not easily removed from stream water and because it can be toxic to aquatic organisms, its presence is a persistent problem. The discovery of biomineralization of Zn-bearing solids in the mine drainage of Rio Naracauli, in Sardinia, Italy, provides insights into strategies for removing Zn and i
Authors
Giovanni De Giudici, Richard B. Wanty, F. Podda, Briant A. Kimball, Philip L. Verplanck, P. Lattanzi, R. Cidu, D. Medas
A deposit model for carbonatite and peralkaline intrusion-related rare earth element deposits
Carbonatite and alkaline intrusive complexes, as well as their weathering products, are the primary sources of rare earth elements. A wide variety of other commodities have been exploited from carbonatites and alkaline igneous rocks including niobium, phosphate, titanium, vermiculite, barite, fluorite, copper, calcite, and zirconium. Other elements enriched in these deposits include manganese, str
Authors
Philip L. Verplanck, Bradley S. Van Gosen, Robert R. Seal, Anne E. McCafferty