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 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...
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 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...
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 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...
Authors
T. K. Hinkley
Rock-forming metals and Pb in modern Alaskan snow 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...
Authors
Todd K. Hinkley
Variation of rock-forming metals in sub-annual increments of modern Greenland snow 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...
Authors
T. K. Hinkley
Distribution of metals between particulate and gaseous forms in a volcanic plume 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...
Authors
T. K. Hinkley
Science and Products
Filter Total Items: 27
Hydrogen and oxygen isotopic compositions of waters from fumaroles at Kilauea summit, Hawaii 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...
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 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...
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 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...
Authors
T. K. Hinkley
Rock-forming metals and Pb in modern Alaskan snow 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...
Authors
Todd K. Hinkley
Variation of rock-forming metals in sub-annual increments of modern Greenland snow 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...
Authors
T. K. Hinkley
Distribution of metals between particulate and gaseous forms in a volcanic plume 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...
Authors
T. K. Hinkley