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 isotopes of host strata for Howards Pass (Yukon–Northwest Territories) Zn-Pb deposits implicate anaerobic oxidation of methane, not basin stagnation Sulfur isotopes of host strata for Howards Pass (Yukon–Northwest Territories) Zn-Pb deposits implicate anaerobic oxidation of methane, not basin stagnation
A new sulfur isotope stratigraphic profile has been developed for Ordovician-Silurian mudstones that host the Howards Pass Zn-Pb deposits (Canada) in an attempt to reconcile the traditional model of a stagnant euxinic basin setting with new contradictory findings. Our analyses of pyrite confirm the up-section 34S enrichment reported previously, but additional observations show parallel...
Authors
Craig A. Johnson, John F. Slack, Julie A. Dumoulin, Karen Duttweiler Kelley, Hendrik Falck
Determination of δ13C, δ15N, or δ34S by isotope-ratio-monitoring mass spectrometry using an elemental analyzer Determination of δ13C, δ15N, or δ34S by isotope-ratio-monitoring mass spectrometry using an elemental analyzer
This report describes procedures used in the Geology, Geophysics, and Geochemistry Science Center of the U.S. Geological Survey in Denver, Colorado, to determine the stable-isotope ratios 13C/12C, 15N/14N, and 34S/32S in solid materials. The procedures use elemental analyzers connected directly to gas-source isotope-ratio mass spectrometers. A different elemental–analyzer–mass...
Authors
Craig A. Johnson, Craig A. Stricker, Cayce A. Gulbransen, Matthew P. Emmons
Intermediate sulfidation type base metal mineralization at Aliabad-Khanchy, Tarom-Hashtjin metallogenic belt, NW Iran Intermediate sulfidation type base metal mineralization at Aliabad-Khanchy, Tarom-Hashtjin metallogenic belt, NW Iran
The Aliabad-Khanchy epithermal base metal deposit is located in the Tarom-Hashtjin metallogenic belt (THMB) of northwest Iran. The mineralization occurs as Cu-bearing brecciated quartz veins hosted by Eocene volcanic and volcaniclastic rocks of the Karaj Formation. Ore formation can be divided into five stages, with most ore minerals, such as pyrite and chalcopyrite being formed in the...
Authors
Hossein Kouhestani, Mir Ali Asghar Mokhtari, Zhaoshan Chang, Craig A. Johnson
Barite (Barium) Barite (Barium)
Barite (barium sulfate, BaSO4) is vital to the oil and gas industry because it is a key constituent of the mud used to drill oil and gas wells. Elemental barium is an additive in optical glass, ceramic glazes, and other products. Within the United States, barite is produced mainly from mines in Nevada. Imports in 2011 (the latest year for which complete data were available) accounted for...
Authors
Craig A. Johnson, Nadine M. Piatak, M. Michael Miller
Transgressive-regressive cycles in the metalliferous, oil-shale-bearing Heath Formation (Upper Mississippian), central Montana Transgressive-regressive cycles in the metalliferous, oil-shale-bearing Heath Formation (Upper Mississippian), central Montana
The Upper Mississippian Heath Formation, which accumulated in the Big Snowy Trough of central Montana, has been known for three decades to contain mudrocks highly enriched in Zn, V, Mo, Ni and other metals, and source rocks for oil. The unit has more recently been recognized as a prospective tight oil play. Here we present petrographic, paleontologic, geochemical, and carbon and sulfur...
Authors
Julie A. Dumoulin, Craig A. Johnson, Karen D. Kelley, Palma J. Botterell, Paul C. Hackley, Clint Scott, John F. Slack
Review: The size of the risk: Histories of multiple use in the Great Basin by Leisl Carr Childers Review: The size of the risk: Histories of multiple use in the Great Basin by Leisl Carr Childers
In The Size of the Risk, Leisl Carr Childers chronicles the changing ways in which public lands of the Great Basin have been managed from the latter half of the nineteenth century through the late 1970s. The main focus is the State of Nevada, which constitutes the core of the Great Basin. Rather than proceeding chronologically, the book is organized by the uses to which lands were put...
Authors
Craig A. Johnson
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 isotopes of host strata for Howards Pass (Yukon–Northwest Territories) Zn-Pb deposits implicate anaerobic oxidation of methane, not basin stagnation Sulfur isotopes of host strata for Howards Pass (Yukon–Northwest Territories) Zn-Pb deposits implicate anaerobic oxidation of methane, not basin stagnation
A new sulfur isotope stratigraphic profile has been developed for Ordovician-Silurian mudstones that host the Howards Pass Zn-Pb deposits (Canada) in an attempt to reconcile the traditional model of a stagnant euxinic basin setting with new contradictory findings. Our analyses of pyrite confirm the up-section 34S enrichment reported previously, but additional observations show parallel...
Authors
Craig A. Johnson, John F. Slack, Julie A. Dumoulin, Karen Duttweiler Kelley, Hendrik Falck
Determination of δ13C, δ15N, or δ34S by isotope-ratio-monitoring mass spectrometry using an elemental analyzer Determination of δ13C, δ15N, or δ34S by isotope-ratio-monitoring mass spectrometry using an elemental analyzer
This report describes procedures used in the Geology, Geophysics, and Geochemistry Science Center of the U.S. Geological Survey in Denver, Colorado, to determine the stable-isotope ratios 13C/12C, 15N/14N, and 34S/32S in solid materials. The procedures use elemental analyzers connected directly to gas-source isotope-ratio mass spectrometers. A different elemental–analyzer–mass...
Authors
Craig A. Johnson, Craig A. Stricker, Cayce A. Gulbransen, Matthew P. Emmons
Intermediate sulfidation type base metal mineralization at Aliabad-Khanchy, Tarom-Hashtjin metallogenic belt, NW Iran Intermediate sulfidation type base metal mineralization at Aliabad-Khanchy, Tarom-Hashtjin metallogenic belt, NW Iran
The Aliabad-Khanchy epithermal base metal deposit is located in the Tarom-Hashtjin metallogenic belt (THMB) of northwest Iran. The mineralization occurs as Cu-bearing brecciated quartz veins hosted by Eocene volcanic and volcaniclastic rocks of the Karaj Formation. Ore formation can be divided into five stages, with most ore minerals, such as pyrite and chalcopyrite being formed in the...
Authors
Hossein Kouhestani, Mir Ali Asghar Mokhtari, Zhaoshan Chang, Craig A. Johnson
Barite (Barium) Barite (Barium)
Barite (barium sulfate, BaSO4) is vital to the oil and gas industry because it is a key constituent of the mud used to drill oil and gas wells. Elemental barium is an additive in optical glass, ceramic glazes, and other products. Within the United States, barite is produced mainly from mines in Nevada. Imports in 2011 (the latest year for which complete data were available) accounted for...
Authors
Craig A. Johnson, Nadine M. Piatak, M. Michael Miller
Transgressive-regressive cycles in the metalliferous, oil-shale-bearing Heath Formation (Upper Mississippian), central Montana Transgressive-regressive cycles in the metalliferous, oil-shale-bearing Heath Formation (Upper Mississippian), central Montana
The Upper Mississippian Heath Formation, which accumulated in the Big Snowy Trough of central Montana, has been known for three decades to contain mudrocks highly enriched in Zn, V, Mo, Ni and other metals, and source rocks for oil. The unit has more recently been recognized as a prospective tight oil play. Here we present petrographic, paleontologic, geochemical, and carbon and sulfur...
Authors
Julie A. Dumoulin, Craig A. Johnson, Karen D. Kelley, Palma J. Botterell, Paul C. Hackley, Clint Scott, John F. Slack
Review: The size of the risk: Histories of multiple use in the Great Basin by Leisl Carr Childers Review: The size of the risk: Histories of multiple use in the Great Basin by Leisl Carr Childers
In The Size of the Risk, Leisl Carr Childers chronicles the changing ways in which public lands of the Great Basin have been managed from the latter half of the nineteenth century through the late 1970s. The main focus is the State of Nevada, which constitutes the core of the Great Basin. Rather than proceeding chronologically, the book is organized by the uses to which lands were put...
Authors
Craig A. Johnson
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.