Craig A Johnson, Ph.D.
Craig Johnson is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
Craig attended Dartmouth (AB), Michigan (MS), and Yale (PhD). He held a NASA postdoc and a staff position at the American Museum of Natural History in New York prior to joining the USGS in 1992. Craig is responsible for a stable isotope laboratory in which isotopes of carbon, hydrogen, nitrogen, oxygen, and sulfur are measured in rocks, waters, gases, and biological materials. Craig studies ore genesis, environmental impacts of mining, the source and fate of solutes in natural waters and crustal fluids, the isotopic record of marine sulfate, and isotopic records of paleoenvironments.
Science and Products
Filter Total Items: 89
Sulfur and oxygen isotopes in barite deposits of the western Brooks Range, Alaska, and implications for the origin of the Red Dog massive sulfide deposits Sulfur and oxygen isotopes in barite deposits of the western Brooks Range, Alaska, and implications for the origin of the Red Dog massive sulfide deposits
Sulfur and oxygen isotope analyses have been obtained for barite samples from the giant stratiform sulfide barite deposits at Red Dog in the western Brooks Range of Alaska, from stratiform barite deposits elsewhere in the Red Dog district, and from stratiform and vein and breccia barite occurrences in the central Brooks Range. Twelve of the 15 deposits studied lie within middle to Upper
Authors
C. Johnson, K.D. Kelley, D. Leach
Constraints on the composition of ore fluids and implications for mineralising events at the Cleo gold deposit, Eastern Goldfields Province, Western Australia Constraints on the composition of ore fluids and implications for mineralising events at the Cleo gold deposit, Eastern Goldfields Province, Western Australia
The Cleo gold deposit, 55 km south of Laverton in the Eastern Goldfields Province of Western Australia, is characterised by banded iron-formation (BIF)-hosted ore zones in the gently dipping Sunrise Shear Zone and high-grade vein-hosted ore in the Western Lodes. There is evidence that gold mineralisation in the Western Lodes (which occurred at ca 2655 Ma) post-dates the majority of...
Authors
S.M. Brown, C. Johnson, R.J. Watling, W. Premo
Geology and geochemistry of the Clear Creek intrusion-related gold occurrences, Tintina Gold Province, Yukon, Canada Geology and geochemistry of the Clear Creek intrusion-related gold occurrences, Tintina Gold Province, Yukon, Canada
The Clear Creek gold occurrences lie within deformed lower greenschist-facies rocks of the western Selwyn basin. They consist of auriferous, sheeted quartz veins that cut six Cretaceous stocks and their hornfels. The veins contain 1-2% combined pyrite and arsenopyrite, with lesser pyrrhotite, bismuthinite, and scheelite, as well as 2-5 g/t Au. New 40Ar/39Ar geochronology of hydrothermal...
Authors
E.E. Marsh, R.J. Goldfarb, C.J.R. Hart, C. Johnson
Geochemistry of the furnace magnetite bed, Franklin, New Jersey, and the relationship between stratiform iron oxide ores and stratiform zinc oxide-silicate ores in the New Jersey highlands Geochemistry of the furnace magnetite bed, Franklin, New Jersey, and the relationship between stratiform iron oxide ores and stratiform zinc oxide-silicate ores in the New Jersey highlands
The New Jersey Highlands terrace, which is an exposure of the Middle Proterozoic Grenville orogenic belt located in northeastern United States, contains stratiform zinc oxide-silicate deposits at Franklin and Sterling Hill and numerous massive magnetite deposits. The origins of the zinc and magnetite deposits have rarely been considered together, but a genetic link is suggested by the...
Authors
C. Johnson, B. Skinner
Stable carbon isotope fractionation of trans-1,2-dichloroethylene during co-metabolic degradation by methanotrophic bacteria Stable carbon isotope fractionation of trans-1,2-dichloroethylene during co-metabolic degradation by methanotrophic bacteria
Changes in the carbon isotope ratio (δ13C) of trans-1,2-dichloroethylene (t-DCE) were measured during its co-metabolic degradation by Methylomonas methanica, a type I methanotroph, and Methylosinus trichosporium OB3b, a type II methanotroph. In closed-vessel incubation experiments with each bacterium, the residual t-DCE became progressively enriched in 13C, indicating isotopic...
Authors
Karen Brungard, Junko Munakata-Marr, Craig Johnson, Kevin Mandernack
Photochemical changes in cyanide speciation in drainage from a precious metal ore heap Photochemical changes in cyanide speciation in drainage from a precious metal ore heap
In drainage from an inactive ore heap at a former gold mine, the speciation of cyanide and the concentrations of several metals were found to follow diurnal cycles. Concentrations of the hexacyanoferrate complex, iron, manganese, and ammonium were higher at night than during the day, whereas weak-acid-dissociable cyanide, silver, gold, copper, nitrite, and pH displayed the reverse...
Authors
C. Johnson, R. Leinz, D. Grimes, R. Rye
Non-USGS Publications**
Riciputi, L.R., McSween, H.Y., Jr., Johnson, C.A., and Prinz, M., 1994, Minor and trace element concentrations in carbonates of carbonaceous chondrites, and implications for the compositions of coexisting fluids: Geochimica et Cosmochimica Acta, 58 (4), p. 1343–1351, https://doi.org/10.1016/0016-7037(94)90386-7.
Johnson, C.A., and Prinz, M., 1993, Carbonate compositions in CM and CI chondrites, and implications for aqueous alteration: Geochimica et Cosmochimica Acta, 57 (12), p. 2843–2852, https://doi.org/10.1016/0016-7037(93)90393-B.
Johnson, C.A., Cardellach, E., Tritlla, J., and Hanan, B.B., 1993, Origin of the Cierco Pb-Zn vein system (central Pyrenees, Spain): evidence from stable isotopes, Sr isotopes and fluid inclusions, in Fenoll Hach-Ali, P., Torrez-Ruiz, J., and Gervilla, F., eds., Current research in geology applied to ore deposits. Proceedings of the 2nd SGA Biennial Meeting, Granada, Spain, 9-11 September 1993, p. 135-138.
Johnson, C.A., and Prinz, M., 1991, Chromite and olivine in type II chondrules in carbonaceous and ordinary chondrites: implications for thermal histories and group differences: Geochimica et Cosmochimica Acta, 55 (3), p. 893–904, https://doi.org/10.1016/0016-7037(91)90349-A.
Johnson, C.A., Rye, D.M., and Skinner, B.J., 1990, Unusual oxygen isotopic compositions in and around the Sterling Hill and Franklin Furnace ore deposits, in Proceedings for conference on character and origin of the Franklin and Sterling Hill orebodies: Bethlehem, PA, Lehigh University, p. 63–76.
Johnson, C.A., Rye, D.M., and Skinner, B.J., 1990, Petrology and stable isotope geochemistry of the metamorphosed zinc-iron-manganese deposit at Sterling Hill, New Jersey: Economic Geology, 85 (6), p. 1133–1161, https://doi.org/10.2113/gsecongeo.85.6.1133.
Johnson, C.A., Prinz, M., Weisberg, M.K., Clayton, R.N., and Mayeda, T.K., 1990, Dark inclusions in Allende, Leoville and Vigarano: evidence for nebular oxidation of CV3 constituents: Geochimica et Cosmochimica Acta, 54 (3), p.819–830, https://doi.org/10.1016/0016-7037(90)90376-V.
Skinner, B.J. and Johnson, C.A., 1987, Evidence for movement of ore materials during high grade metamorphism: Ore Geology Reviews, 2 (1-3), p. 191–204, https://doi.org/10.1016/0169-1368(87)90028-X.
Johnson, C.A., Bohlen, S.R., and Essene, E.J., 1983, An evaluation of garnet-clinopyroxene geothermometry in granulites: Contributions to Mineralogy and Petrology, 84 (2-3), p. 191-198, https://doi.org/10.1007/BF00371285.
Johnson, C.A., and Essene, E. J., 1982, The formation of garnet in olivine-bearing metagabbros in the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, 81 (3), p. 240-251, https://doi.org/10.1007/BF00371301.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 89
Sulfur and oxygen isotopes in barite deposits of the western Brooks Range, Alaska, and implications for the origin of the Red Dog massive sulfide deposits Sulfur and oxygen isotopes in barite deposits of the western Brooks Range, Alaska, and implications for the origin of the Red Dog massive sulfide deposits
Sulfur and oxygen isotope analyses have been obtained for barite samples from the giant stratiform sulfide barite deposits at Red Dog in the western Brooks Range of Alaska, from stratiform barite deposits elsewhere in the Red Dog district, and from stratiform and vein and breccia barite occurrences in the central Brooks Range. Twelve of the 15 deposits studied lie within middle to Upper
Authors
C. Johnson, K.D. Kelley, D. Leach
Constraints on the composition of ore fluids and implications for mineralising events at the Cleo gold deposit, Eastern Goldfields Province, Western Australia Constraints on the composition of ore fluids and implications for mineralising events at the Cleo gold deposit, Eastern Goldfields Province, Western Australia
The Cleo gold deposit, 55 km south of Laverton in the Eastern Goldfields Province of Western Australia, is characterised by banded iron-formation (BIF)-hosted ore zones in the gently dipping Sunrise Shear Zone and high-grade vein-hosted ore in the Western Lodes. There is evidence that gold mineralisation in the Western Lodes (which occurred at ca 2655 Ma) post-dates the majority of...
Authors
S.M. Brown, C. Johnson, R.J. Watling, W. Premo
Geology and geochemistry of the Clear Creek intrusion-related gold occurrences, Tintina Gold Province, Yukon, Canada Geology and geochemistry of the Clear Creek intrusion-related gold occurrences, Tintina Gold Province, Yukon, Canada
The Clear Creek gold occurrences lie within deformed lower greenschist-facies rocks of the western Selwyn basin. They consist of auriferous, sheeted quartz veins that cut six Cretaceous stocks and their hornfels. The veins contain 1-2% combined pyrite and arsenopyrite, with lesser pyrrhotite, bismuthinite, and scheelite, as well as 2-5 g/t Au. New 40Ar/39Ar geochronology of hydrothermal...
Authors
E.E. Marsh, R.J. Goldfarb, C.J.R. Hart, C. Johnson
Geochemistry of the furnace magnetite bed, Franklin, New Jersey, and the relationship between stratiform iron oxide ores and stratiform zinc oxide-silicate ores in the New Jersey highlands Geochemistry of the furnace magnetite bed, Franklin, New Jersey, and the relationship between stratiform iron oxide ores and stratiform zinc oxide-silicate ores in the New Jersey highlands
The New Jersey Highlands terrace, which is an exposure of the Middle Proterozoic Grenville orogenic belt located in northeastern United States, contains stratiform zinc oxide-silicate deposits at Franklin and Sterling Hill and numerous massive magnetite deposits. The origins of the zinc and magnetite deposits have rarely been considered together, but a genetic link is suggested by the...
Authors
C. Johnson, B. Skinner
Stable carbon isotope fractionation of trans-1,2-dichloroethylene during co-metabolic degradation by methanotrophic bacteria Stable carbon isotope fractionation of trans-1,2-dichloroethylene during co-metabolic degradation by methanotrophic bacteria
Changes in the carbon isotope ratio (δ13C) of trans-1,2-dichloroethylene (t-DCE) were measured during its co-metabolic degradation by Methylomonas methanica, a type I methanotroph, and Methylosinus trichosporium OB3b, a type II methanotroph. In closed-vessel incubation experiments with each bacterium, the residual t-DCE became progressively enriched in 13C, indicating isotopic...
Authors
Karen Brungard, Junko Munakata-Marr, Craig Johnson, Kevin Mandernack
Photochemical changes in cyanide speciation in drainage from a precious metal ore heap Photochemical changes in cyanide speciation in drainage from a precious metal ore heap
In drainage from an inactive ore heap at a former gold mine, the speciation of cyanide and the concentrations of several metals were found to follow diurnal cycles. Concentrations of the hexacyanoferrate complex, iron, manganese, and ammonium were higher at night than during the day, whereas weak-acid-dissociable cyanide, silver, gold, copper, nitrite, and pH displayed the reverse...
Authors
C. Johnson, R. Leinz, D. Grimes, R. Rye
Non-USGS Publications**
Riciputi, L.R., McSween, H.Y., Jr., Johnson, C.A., and Prinz, M., 1994, Minor and trace element concentrations in carbonates of carbonaceous chondrites, and implications for the compositions of coexisting fluids: Geochimica et Cosmochimica Acta, 58 (4), p. 1343–1351, https://doi.org/10.1016/0016-7037(94)90386-7.
Johnson, C.A., and Prinz, M., 1993, Carbonate compositions in CM and CI chondrites, and implications for aqueous alteration: Geochimica et Cosmochimica Acta, 57 (12), p. 2843–2852, https://doi.org/10.1016/0016-7037(93)90393-B.
Johnson, C.A., Cardellach, E., Tritlla, J., and Hanan, B.B., 1993, Origin of the Cierco Pb-Zn vein system (central Pyrenees, Spain): evidence from stable isotopes, Sr isotopes and fluid inclusions, in Fenoll Hach-Ali, P., Torrez-Ruiz, J., and Gervilla, F., eds., Current research in geology applied to ore deposits. Proceedings of the 2nd SGA Biennial Meeting, Granada, Spain, 9-11 September 1993, p. 135-138.
Johnson, C.A., and Prinz, M., 1991, Chromite and olivine in type II chondrules in carbonaceous and ordinary chondrites: implications for thermal histories and group differences: Geochimica et Cosmochimica Acta, 55 (3), p. 893–904, https://doi.org/10.1016/0016-7037(91)90349-A.
Johnson, C.A., Rye, D.M., and Skinner, B.J., 1990, Unusual oxygen isotopic compositions in and around the Sterling Hill and Franklin Furnace ore deposits, in Proceedings for conference on character and origin of the Franklin and Sterling Hill orebodies: Bethlehem, PA, Lehigh University, p. 63–76.
Johnson, C.A., Rye, D.M., and Skinner, B.J., 1990, Petrology and stable isotope geochemistry of the metamorphosed zinc-iron-manganese deposit at Sterling Hill, New Jersey: Economic Geology, 85 (6), p. 1133–1161, https://doi.org/10.2113/gsecongeo.85.6.1133.
Johnson, C.A., Prinz, M., Weisberg, M.K., Clayton, R.N., and Mayeda, T.K., 1990, Dark inclusions in Allende, Leoville and Vigarano: evidence for nebular oxidation of CV3 constituents: Geochimica et Cosmochimica Acta, 54 (3), p.819–830, https://doi.org/10.1016/0016-7037(90)90376-V.
Skinner, B.J. and Johnson, C.A., 1987, Evidence for movement of ore materials during high grade metamorphism: Ore Geology Reviews, 2 (1-3), p. 191–204, https://doi.org/10.1016/0169-1368(87)90028-X.
Johnson, C.A., Bohlen, S.R., and Essene, E.J., 1983, An evaluation of garnet-clinopyroxene geothermometry in granulites: Contributions to Mineralogy and Petrology, 84 (2-3), p. 191-198, https://doi.org/10.1007/BF00371285.
Johnson, C.A., and Essene, E. J., 1982, The formation of garnet in olivine-bearing metagabbros in the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, 81 (3), p. 240-251, https://doi.org/10.1007/BF00371301.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.