Todd K Hinkley
Todd Hinkley is a Scientist Emeritus with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
Filter Total Items: 27
Hydrogen and oxygen isotopic compositions of waters from fumaroles at Kilauea summit, Hawaii
Condensate samples were collected in 1992 from a high-temperature (300° C) fumarole on the floor of the Halemaumau Pit Crater at Kilauea. The emergence about two years earlier of such a hot fumarole was unprecedented at such a central location at Kilauea. The condensates have hydrogen and oxygen isotopic compositions which indicate that the waters emitted by the fumarole are composed largely of me
Authors
T. K. Hinkley, J. E. Quick, R. T. Gregory, T.M. Gerlach
Fractionation of families of major, minor, and trace metals across the melt-vapor interface in volcanic exhalations
Chemical families of metals fractionate systematically as they pass from a silicate melt across the interface with the vapor phase and on into a cooled volcanic plume. We measured three groups of metals in a small suite of samples collected on filters from the plumes of Kilauea (Hawaii, USA), Etna (Sicily), and Merapi (Java) volcanoes. These were the major, minor, and trace metals of the alkali an
Authors
T. K. Hinkley, M.-F. Le Cloarec, G. Lambert
Composition and sources of atmospheric dusts in snow at 3200 meters in the St. Elias Range, southeastern Alaska, USA
Dusts in snow from the accumulation zone in the St. Elias Range appear from their chemical compositions to have come from terranes of rocks of ferromagnesian composition. These dusts, with respect to their composition and to the moderate degree of variation that occurs through a depositional year, are similar those deposited in Greenland. The high portion of the St. Elias Range is isolated from do
Authors
T. K. Hinkley
Rock-forming metals and Pb in modern Alaskan snow
Metal concentrations in annual and subannual increments of snowpack from the accumulation zone of a south central Alaska glacier indicate that the deposition of Pb with and upon snow is decoupled from that of rock dusts. Rock dusts accumulate, apparently as dry deposition, on the topmost, exposed surfaces of snowpacks in spring and summer, whereas Pb does not. Pb concentration is elevated througho
Authors
Todd K. Hinkley
Variation of rock-forming metals in sub-annual increments of modern Greenland snow
Modern snowpack from central south Greenland was sampled in sub-seasonal increments and analysed for a suite of major, minor and trace rock-forming metals (K, Rb, Cs, Ca, Sr, Ba). There is a sharp seasonal concentration maximum for all six metals that comes in summer, later than mid-June. Metal concentrations in all other parts of the year's snowpack are up to 10 or more times smaller. The concent
Authors
T. K. Hinkley
Distribution of metals between particulate and gaseous forms in a volcanic plume
In order to gain information on the distribution of metals between particles and gaseous forms in the plume of Kilauea volcano, a filter designed to collect metals associated with particles was followed in series by two other collectors intended to trap metals present in gaseous (atomic, molecular, or complexed) form: first an acid-bubbler bath and then a cold trap. Of the six metals measured, all
Authors
T. K. Hinkley
Tritium concentrations in the active Pu'u O'o crater, Kilauea volcano, Hawaii: implications for cold fusion in the Earth's interior
The assertion that deuterium-deuterium fusion may occur at low temperature suggests a potential new source of geothermal heat. If a cold-fusion-like process occurs within the Earth, then a test for its existence would be a search for anomalous tritium in volcanic emissions. The Pu'u O'o crater is the first point at which large amounts of water are degassed from the magma that feeds the Kilauea sys
Authors
J. E. Quick, T. K. Hinkley, G. M. Reimer, C. E. Hedge
Major- and minor-metal composition of three distinct solid material fractions associated with Juan de Fuca hydrothermal fluids (northeast Pacific), and calculation of dilution fluid samples
Three distinct types of solid material are associated with each sample of the hydrothermal fluid that was collected from the vents of the Southern Juan de Fuca Ridge. The solid materials appear to be representative of deposits on ocean floors near mid-ocean ridges, and interpretation of the chemistry of the hydrothermal solutions requires understanding of them. Sr isotopic evidence indicates that
Authors
T. K. Hinkley, J. L. Seeley, M. Tatsumoto
Chemistry of ash and leachates from the May 18, 1980 eruption of Mount St. Helens, Washington
No abstract available.
Authors
T. K. Hinkley
Whole-rock chemical composition of some samples from two drill hole cores in the Capps coal field, Beluga coal area, south-central Alaska
Whole-rock chemical analysis was done on samples from drill cores of rocks lying atop and between coal beds in the Beluga coal area, south-central Alaska. The samples were classified as sandstone, siltstone or claystone at time of hand specimen description. Chemical data were compared to those from corresponding rocks from other sites in the conterminous United States. The study supports the follo
Authors
T. K. Hinkley, K. S. Smith, J. L. Peard, M.L. Tompkins
Overburden geochemistry of U.S. Bureau of Land Management experimental coal mining reclamation site at Kimbeto, southeastern San Juan County, San Juan Basin, New Mexico
No abstract available.
Authors
Todd K. Hinkley, J. R. Herring, K. S. Smith, J.G. Boerngen
Overburden geochemistry of the U.S. Bureau of Land Management experimental coal mining reclamation site at Ojo Encino, Northeast McKinley County, San Juan Basin, New Mexico
No abstract available.
Authors
Todd K. Hinkley, J. R. Herring, K. S. Smith, J.G. Boerngen
Science and Products
Filter Total Items: 27
Hydrogen and oxygen isotopic compositions of waters from fumaroles at Kilauea summit, Hawaii
Condensate samples were collected in 1992 from a high-temperature (300° C) fumarole on the floor of the Halemaumau Pit Crater at Kilauea. The emergence about two years earlier of such a hot fumarole was unprecedented at such a central location at Kilauea. The condensates have hydrogen and oxygen isotopic compositions which indicate that the waters emitted by the fumarole are composed largely of me
Authors
T. K. Hinkley, J. E. Quick, R. T. Gregory, T.M. Gerlach
Fractionation of families of major, minor, and trace metals across the melt-vapor interface in volcanic exhalations
Chemical families of metals fractionate systematically as they pass from a silicate melt across the interface with the vapor phase and on into a cooled volcanic plume. We measured three groups of metals in a small suite of samples collected on filters from the plumes of Kilauea (Hawaii, USA), Etna (Sicily), and Merapi (Java) volcanoes. These were the major, minor, and trace metals of the alkali an
Authors
T. K. Hinkley, M.-F. Le Cloarec, G. Lambert
Composition and sources of atmospheric dusts in snow at 3200 meters in the St. Elias Range, southeastern Alaska, USA
Dusts in snow from the accumulation zone in the St. Elias Range appear from their chemical compositions to have come from terranes of rocks of ferromagnesian composition. These dusts, with respect to their composition and to the moderate degree of variation that occurs through a depositional year, are similar those deposited in Greenland. The high portion of the St. Elias Range is isolated from do
Authors
T. K. Hinkley
Rock-forming metals and Pb in modern Alaskan snow
Metal concentrations in annual and subannual increments of snowpack from the accumulation zone of a south central Alaska glacier indicate that the deposition of Pb with and upon snow is decoupled from that of rock dusts. Rock dusts accumulate, apparently as dry deposition, on the topmost, exposed surfaces of snowpacks in spring and summer, whereas Pb does not. Pb concentration is elevated througho
Authors
Todd K. Hinkley
Variation of rock-forming metals in sub-annual increments of modern Greenland snow
Modern snowpack from central south Greenland was sampled in sub-seasonal increments and analysed for a suite of major, minor and trace rock-forming metals (K, Rb, Cs, Ca, Sr, Ba). There is a sharp seasonal concentration maximum for all six metals that comes in summer, later than mid-June. Metal concentrations in all other parts of the year's snowpack are up to 10 or more times smaller. The concent
Authors
T. K. Hinkley
Distribution of metals between particulate and gaseous forms in a volcanic plume
In order to gain information on the distribution of metals between particles and gaseous forms in the plume of Kilauea volcano, a filter designed to collect metals associated with particles was followed in series by two other collectors intended to trap metals present in gaseous (atomic, molecular, or complexed) form: first an acid-bubbler bath and then a cold trap. Of the six metals measured, all
Authors
T. K. Hinkley
Tritium concentrations in the active Pu'u O'o crater, Kilauea volcano, Hawaii: implications for cold fusion in the Earth's interior
The assertion that deuterium-deuterium fusion may occur at low temperature suggests a potential new source of geothermal heat. If a cold-fusion-like process occurs within the Earth, then a test for its existence would be a search for anomalous tritium in volcanic emissions. The Pu'u O'o crater is the first point at which large amounts of water are degassed from the magma that feeds the Kilauea sys
Authors
J. E. Quick, T. K. Hinkley, G. M. Reimer, C. E. Hedge
Major- and minor-metal composition of three distinct solid material fractions associated with Juan de Fuca hydrothermal fluids (northeast Pacific), and calculation of dilution fluid samples
Three distinct types of solid material are associated with each sample of the hydrothermal fluid that was collected from the vents of the Southern Juan de Fuca Ridge. The solid materials appear to be representative of deposits on ocean floors near mid-ocean ridges, and interpretation of the chemistry of the hydrothermal solutions requires understanding of them. Sr isotopic evidence indicates that
Authors
T. K. Hinkley, J. L. Seeley, M. Tatsumoto
Chemistry of ash and leachates from the May 18, 1980 eruption of Mount St. Helens, Washington
No abstract available.
Authors
T. K. Hinkley
Whole-rock chemical composition of some samples from two drill hole cores in the Capps coal field, Beluga coal area, south-central Alaska
Whole-rock chemical analysis was done on samples from drill cores of rocks lying atop and between coal beds in the Beluga coal area, south-central Alaska. The samples were classified as sandstone, siltstone or claystone at time of hand specimen description. Chemical data were compared to those from corresponding rocks from other sites in the conterminous United States. The study supports the follo
Authors
T. K. Hinkley, K. S. Smith, J. L. Peard, M.L. Tompkins
Overburden geochemistry of U.S. Bureau of Land Management experimental coal mining reclamation site at Kimbeto, southeastern San Juan County, San Juan Basin, New Mexico
No abstract available.
Authors
Todd K. Hinkley, J. R. Herring, K. S. Smith, J.G. Boerngen
Overburden geochemistry of the U.S. Bureau of Land Management experimental coal mining reclamation site at Ojo Encino, Northeast McKinley County, San Juan Basin, New Mexico
No abstract available.
Authors
Todd K. Hinkley, J. R. Herring, K. S. Smith, J.G. Boerngen