D. Kirk Nordstrom (Former Employee)
Science and Products
Filter Total Items: 164
Sulfolobus islandicus meta-populations in Yellowstone National Park hot springs Sulfolobus islandicus meta-populations in Yellowstone National Park hot springs
Abiotic and biotic forces shape the structure and evolution of microbial populations. We investigated forces that shape the spatial and temporal population structure of Sulfolobus islandicus by comparing geochemical and molecular analysis from seven hot springs in five regions sampled over 3 years in Yellowstone National Park. Through deep amplicon sequencing, we uncovered 148 unique...
Authors
Kate M. Campbell, Angela Kouris, Whitney England, Rika E. Anderson, R. Blaine McCleskey, D. Kirk Nordstrom, Rachel J. Whitaker
A geochemical examination of humidity cell tests A geochemical examination of humidity cell tests
Humidity cell tests (HCTs) are long-term (20 to >300 weeks) leach tests that are considered by some to be the among the most reliable geochemical characterization methods for estimating the leachate quality of mined materials. A number of modifications have been added to the original HCT method, but the interpretation of test results varies widely. We suggest that the HCTs represent an
Authors
Ann Maest, D. Kirk Nordstrom
Thermodynamic properties in the Fe(II)-Fe(III)-As(V)-HClO4–H2O and Fe(II)-Fe(III)-As(V)-HCl–H2O systems from 5 to 90 °C Thermodynamic properties in the Fe(II)-Fe(III)-As(V)-HClO4–H2O and Fe(II)-Fe(III)-As(V)-HCl–H2O systems from 5 to 90 °C
Fe-As mineral solubility and associated aqueous species have been intensively studied because of the environmental need to immobilize arsenic. The thermodynamic data for aqueous iron-arsenic species are inadequately characterized, however. The Gibbs free energy, enthalpy, entropy, and heat capacity and activity coefficients were refined in the Fe(II)-Fe(III)-As(V)-HClO4-H2O and Fe(II)-Fe...
Authors
Xiangyu Zhu, D. Kirk Nordstrom, R. Blaine McCleskey, Rucheng Wang, Xiancai Lu
Multireaction equilibrium geothermometry: A sensitivity analysis using data from the Lower Geyser Basin, Yellowstone National Park, USA Multireaction equilibrium geothermometry: A sensitivity analysis using data from the Lower Geyser Basin, Yellowstone National Park, USA
A multireaction chemical equilibria geothermometry (MEG) model applicable to high-temperature geothermal systems has been developed over the past three decades. Given sufficient data, this model provides more constraint on calculated reservoir temperatures than classical chemical geothermometers that are based on either the concentration of silica (SiO2), or the ratios of cation...
Authors
Jonathan M. King, Shaul Hurwitz, Jacob B. Lowenstern, D. Kirk Nordstrom, R. Blaine McCleskey
Ionic molal conductivities, activity coefficients, and dissociation constants of HAsO42− and H2AsO4− from 5 to 90°C and ionic strengths from 0.001 up to 3 mol kg−1 and applications in natur Ionic molal conductivities, activity coefficients, and dissociation constants of HAsO42− and H2AsO4− from 5 to 90°C and ionic strengths from 0.001 up to 3 mol kg−1 and applications in natur
Arsenic is known to be one of the most toxic inorganic elements, causing worldwide environmental contamination. However, many fundamental properties related to aqueous arsenic species are not well known which will inhibit our ability to understand the geochemical behavior of arsenic (e.g. speciation, transport, and solubility). Here, the electrical conductivity of Na2HAsO4 solutions has...
Authors
Xiangyu Zhu, D. Kirk Nordstrom, R. Blaine McCleskey, Rucheng Wang
Geothermal solute flux monitoring and the source and fate of solutes in the Snake River, Yellowstone National Park, WY Geothermal solute flux monitoring and the source and fate of solutes in the Snake River, Yellowstone National Park, WY
The combined geothermal discharge from over 10,000 features in Yellowstone National Park (YNP) can be can be estimated from the Cl flux in the Madison, Yellowstone, Falls, and Snake Rivers. Over the last 30 years, the Cl flux in YNP Rivers has been calculated using discharge measurements and Cl concentrations determined in discrete water samples and it has been determined that...
Authors
R. Blaine McCleskey, Jacob B. Lowenstern, Jonas Schaper, D. Kirk Nordstrom, Henry P. Heasler, Dan Mahony
Science and Products
Filter Total Items: 164
Sulfolobus islandicus meta-populations in Yellowstone National Park hot springs Sulfolobus islandicus meta-populations in Yellowstone National Park hot springs
Abiotic and biotic forces shape the structure and evolution of microbial populations. We investigated forces that shape the spatial and temporal population structure of Sulfolobus islandicus by comparing geochemical and molecular analysis from seven hot springs in five regions sampled over 3 years in Yellowstone National Park. Through deep amplicon sequencing, we uncovered 148 unique...
Authors
Kate M. Campbell, Angela Kouris, Whitney England, Rika E. Anderson, R. Blaine McCleskey, D. Kirk Nordstrom, Rachel J. Whitaker
A geochemical examination of humidity cell tests A geochemical examination of humidity cell tests
Humidity cell tests (HCTs) are long-term (20 to >300 weeks) leach tests that are considered by some to be the among the most reliable geochemical characterization methods for estimating the leachate quality of mined materials. A number of modifications have been added to the original HCT method, but the interpretation of test results varies widely. We suggest that the HCTs represent an
Authors
Ann Maest, D. Kirk Nordstrom
Thermodynamic properties in the Fe(II)-Fe(III)-As(V)-HClO4–H2O and Fe(II)-Fe(III)-As(V)-HCl–H2O systems from 5 to 90 °C Thermodynamic properties in the Fe(II)-Fe(III)-As(V)-HClO4–H2O and Fe(II)-Fe(III)-As(V)-HCl–H2O systems from 5 to 90 °C
Fe-As mineral solubility and associated aqueous species have been intensively studied because of the environmental need to immobilize arsenic. The thermodynamic data for aqueous iron-arsenic species are inadequately characterized, however. The Gibbs free energy, enthalpy, entropy, and heat capacity and activity coefficients were refined in the Fe(II)-Fe(III)-As(V)-HClO4-H2O and Fe(II)-Fe...
Authors
Xiangyu Zhu, D. Kirk Nordstrom, R. Blaine McCleskey, Rucheng Wang, Xiancai Lu
Multireaction equilibrium geothermometry: A sensitivity analysis using data from the Lower Geyser Basin, Yellowstone National Park, USA Multireaction equilibrium geothermometry: A sensitivity analysis using data from the Lower Geyser Basin, Yellowstone National Park, USA
A multireaction chemical equilibria geothermometry (MEG) model applicable to high-temperature geothermal systems has been developed over the past three decades. Given sufficient data, this model provides more constraint on calculated reservoir temperatures than classical chemical geothermometers that are based on either the concentration of silica (SiO2), or the ratios of cation...
Authors
Jonathan M. King, Shaul Hurwitz, Jacob B. Lowenstern, D. Kirk Nordstrom, R. Blaine McCleskey
Ionic molal conductivities, activity coefficients, and dissociation constants of HAsO42− and H2AsO4− from 5 to 90°C and ionic strengths from 0.001 up to 3 mol kg−1 and applications in natur Ionic molal conductivities, activity coefficients, and dissociation constants of HAsO42− and H2AsO4− from 5 to 90°C and ionic strengths from 0.001 up to 3 mol kg−1 and applications in natur
Arsenic is known to be one of the most toxic inorganic elements, causing worldwide environmental contamination. However, many fundamental properties related to aqueous arsenic species are not well known which will inhibit our ability to understand the geochemical behavior of arsenic (e.g. speciation, transport, and solubility). Here, the electrical conductivity of Na2HAsO4 solutions has...
Authors
Xiangyu Zhu, D. Kirk Nordstrom, R. Blaine McCleskey, Rucheng Wang
Geothermal solute flux monitoring and the source and fate of solutes in the Snake River, Yellowstone National Park, WY Geothermal solute flux monitoring and the source and fate of solutes in the Snake River, Yellowstone National Park, WY
The combined geothermal discharge from over 10,000 features in Yellowstone National Park (YNP) can be can be estimated from the Cl flux in the Madison, Yellowstone, Falls, and Snake Rivers. Over the last 30 years, the Cl flux in YNP Rivers has been calculated using discharge measurements and Cl concentrations determined in discrete water samples and it has been determined that...
Authors
R. Blaine McCleskey, Jacob B. Lowenstern, Jonas Schaper, D. Kirk Nordstrom, Henry P. Heasler, Dan Mahony
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