Clark M. Johnson

1997- Geology & Geophysics University of Wisconsin, Madison, Madison, WI 
Geology, Geochemistry
"Clark M. Johnson"

Cross-listing: Geotree


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Robert G Coleman grad student 1986 Stanford (Geotree)
 (The questa magmatic system: Petrologic, chemical and isotopic variations in cogenetic volcanic and plutonic rocks of the latir volcanic field and associated intrusives, northern New Mexico)


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Brian L Beard grad student 1992 UW Madison
Ronald C. Schott grad student 2000 UW Madison (Geotree)
Garret L. Hart grad student 2002 UW Madison (Geotree)
Thomas J. Lapen grad student 2005 UW Madison (Geotree)
Nancy J. Mahlen grad student 2007 UW Madison (Geotree)
Meagan E. Ankney grad student 2014 UW Madison (Geotree)
Silke Severmann post-doc (Chemistry Tree)
Andrew D. Czaja post-doc 2008-2012 UW Madison


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Brian L Beard collaborator 2013-2017 UW Madison
 (01/2013 - 12/2017 (CAN 6))
Nicolas J Beukes collaborator 2013-2017 University of Johannesburg
 (01/2013 - 12/2017 (CAN 6))
Eric S. Boyd collaborator 2013-2017 Montana State
 (01/2013 - 12/2017 (CAN 6))
Kathryn L. Bryson collaborator 2013-2017 NASA Ames Research Center
 (01/2013 - 12/2017 (CAN 6))
Aaron J. Cavosie collaborator 2013-2017 Recinto Universitario de Mayagüez
 (01/2013 - 12/2017 (CAN 6))
Suvankar Chakraborty collaborator 2013-2017 University of Kentucky
 (01/2013 - 12/2017 (CAN 6))
Max L Coleman collaborator 2013-2017 Jet Propulsion Laboratory
 (01/2013 - 12/2017 (CAN 6))
Pascale Ehrenfreund collaborator 2013-2017 George Washington University
 (01/2013 - 12/2017 (CAN 6))
Andreas K. G. Elsässer collaborator 2013-2017 Leiden
 (01/2013 - 12/2017 (CAN 6))
David Emerson collaborator 2013-2017 Bigelow Laboratory for Ocean Sciences
 (01/2013 - 12/2017 (CAN 6))
Philip W. Fralick collaborator 2013-2017 Lakehead University
 (01/2013 - 12/2017 (CAN 6))
Kouki Kitajima collaborator 2013-2017 UW Madison
BETA: Related publications


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Smith AJB, Beukes NJ, Gutzmer J, et al. (2020) Life on a Mesoarchean marine shelf - insights from the world's oldest known granular iron formation. Scientific Reports. 10: 10519
Fortney NW, Beard BL, Hutchings JA, et al. (2020) Geochemical and Stable Fe Isotopic Analysis of Dissimilatory Microbial Iron Reduction in Chocolate Pots Hot Spring, Yellowstone National Park. Astrobiology
Williams RT, Beard BL, Goodwin LB, et al. (2020) Corrigendum to radiogenic isotopes record a ‘drop in a bucket’–A fingerprint of multi-kilometer-scale fluid pathways inferred to drive fault-valve behavior [J. Struct. Geol. 125 (2019) 262–269] Journal of Structural Geology. 138: 103897
Williams RT, Beard BL, Goodwin LB, et al. (2019) Radiogenic isotopes record a ‘drop in a bucket’ – A fingerprint of multi-kilometer-scale fluid pathways inferred to drive fault-valve behavior Journal of Structural Geology. 125: 262-269
Zheng XY, Beard BL, Johnson CM. (2019) Constraining silicon isotope exchange kinetics and fractionation between aqueous and amorphous Si at room temperature Geochimica Et Cosmochimica Acta. 253: 267-289
Haroldson EL, Beard BL, Satkoski AM, et al. (2018) Gold remobilization associated with Mississippi Valley–type fluids: A Pb isotope perspective Geological Society of America Bulletin. 130: 1583-1595
Zheng XY, Beard BL, Johnson CM. (2018) Assessment of matrix effects associated with Fe isotope analysis using 266 nm femtosecond and 193 nm nanosecond laser ablation multi-collector inductively coupled plasma mass spectrometry Journal of Analytical Atomic Spectrometry. 33: 68-83
Czaja AD, Kranendonk MJV, Beard BL, et al. (2018) A multistage origin for Neoarchean layered hematite-magnetite iron formation from the Weld Range, Yilgarn Craton, Western Australia Chemical Geology. 488: 125-137
Smith AJB, Beukes NJ, Gutzmer J, et al. (2017) Oncoidal granular iron formation in the Mesoarchaean Pongola Supergroup, southern Africa: Textural and geochemical evidence for biological activity during iron deposition. Geobiology
Ankney ME, Bacon CR, Valley JW, et al. (2017) Oxygen and U-Th isotopes and the timescales of hydrothermal exchange and melting in granitoid wall rocks at Mount Mazama, Crater Lake, Oregon Geochimica Et Cosmochimica Acta. 213: 137-154
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