David Parkhurst (Former Employee)
Science and Products
Filter Total Items: 30
Chemical analyses of stream sediment in the Tar Creek basin of the Picher mining area, northeast Oklahoma
Chemical analyses are presented for 47 sediment samples from the Tar Creek drainage in the Picher mining area of northeast Oklahoma. The samples were taken in December 1983, June 1984, and June 1985. All of the samples were taken downstream from mine-water discharge points of abandoned lead and zinc mines. The 34 samples taken in December 1983 and June 1984 were analyzed semiquantitatively by emis
Authors
David L. Parkhurst, Michael Doughten, Paul P. Hearn,
Chemical analyses of water samples from the Picher mining area, northeast Oklahoma and southeast Kansas
Chemical analyses are presented for 169 water samples from Tar Creek drainage and the Picher lead-zinc mining area of northeast Oklahoma and southeast Kansas. Water samples were taken from November 1983 through February 1986 from the abandoned mines, from points of mine-water discharge, and from surface-water locations upstream and downstream from mine discharge area. The pH, temperature, alkalini
Authors
David L. Parkhurst
Methods for the collection of geochemical data from the sediments of the tidal Potomac River and estuary and data for 1978-1980
The chemical composition of bottom sediments and their associated pore waters from the tidal Potomac River and Estuary was studied from May 1978 through June 1980. Pore waters were routinely analyzed for pH, Eh, alkalinity, and concentrations of sulfide, sulfate, phosphate, carbon, ammonium, silica, iron, manganese, chloride, sodium, potassium, calcium, and magnesium. Porosity, weight loss on igni
Authors
S.D. Goodwin, B.I. Schultz, D.L. Parkhurst, N.S. Simon, Edward Callender
BALANCE : A computer program for calculating mass transfer for geochemical reactions in ground water
BALANCE is a Fortran computer program designed to define and quantify chemical reactions between ground water and minerals. Using (1) the chemical compositions of water samples from two points along a flow path and (2) a set of mineral phases hypothesized to be the reactive constituents in the system, the program calculates the mass transfer (amounts of the phases entering or leaving the aqueous p
Authors
David L. Parkhurst, Niel Plummer, Donald C. Thorstenson
PHREEQE : a computer program for geochemical calculations
No abstract available.
Authors
David L. Parkhurst, Donald C. Thorstenson, Niel Plummer
MIX2 : a computer program for modeling chemical reaction in natural waters
No abstract available.
Authors
Niel Plummer, David L. Parkhurst, David R. Kosiur
Science and Products
Filter Total Items: 30
Chemical analyses of stream sediment in the Tar Creek basin of the Picher mining area, northeast Oklahoma
Chemical analyses are presented for 47 sediment samples from the Tar Creek drainage in the Picher mining area of northeast Oklahoma. The samples were taken in December 1983, June 1984, and June 1985. All of the samples were taken downstream from mine-water discharge points of abandoned lead and zinc mines. The 34 samples taken in December 1983 and June 1984 were analyzed semiquantitatively by emis
Authors
David L. Parkhurst, Michael Doughten, Paul P. Hearn,
Chemical analyses of water samples from the Picher mining area, northeast Oklahoma and southeast Kansas
Chemical analyses are presented for 169 water samples from Tar Creek drainage and the Picher lead-zinc mining area of northeast Oklahoma and southeast Kansas. Water samples were taken from November 1983 through February 1986 from the abandoned mines, from points of mine-water discharge, and from surface-water locations upstream and downstream from mine discharge area. The pH, temperature, alkalini
Authors
David L. Parkhurst
Methods for the collection of geochemical data from the sediments of the tidal Potomac River and estuary and data for 1978-1980
The chemical composition of bottom sediments and their associated pore waters from the tidal Potomac River and Estuary was studied from May 1978 through June 1980. Pore waters were routinely analyzed for pH, Eh, alkalinity, and concentrations of sulfide, sulfate, phosphate, carbon, ammonium, silica, iron, manganese, chloride, sodium, potassium, calcium, and magnesium. Porosity, weight loss on igni
Authors
S.D. Goodwin, B.I. Schultz, D.L. Parkhurst, N.S. Simon, Edward Callender
BALANCE : A computer program for calculating mass transfer for geochemical reactions in ground water
BALANCE is a Fortran computer program designed to define and quantify chemical reactions between ground water and minerals. Using (1) the chemical compositions of water samples from two points along a flow path and (2) a set of mineral phases hypothesized to be the reactive constituents in the system, the program calculates the mass transfer (amounts of the phases entering or leaving the aqueous p
Authors
David L. Parkhurst, Niel Plummer, Donald C. Thorstenson
PHREEQE : a computer program for geochemical calculations
No abstract available.
Authors
David L. Parkhurst, Donald C. Thorstenson, Niel Plummer
MIX2 : a computer program for modeling chemical reaction in natural waters
No abstract available.
Authors
Niel Plummer, David L. Parkhurst, David R. Kosiur