Benjamin Johnson

Contact

Dept:Geological And Atmospheric Sciences
Email:bwj@iastate.edu
Office:Science
2237 Osborn Dr
Ames IA
50011-1027
Phone:515-294-5823
Website:http://www.benwjohnson.com

Bio

Education
Ph.D. Earth and Ocean Sciences, University of Victoria, 2017
M.Sc. Geology and Geophysics, University of Utah, 2009
B.Sc. Geology, University of Puget Sound, 2006

Research
I am a geologist and geochemist with broad interests that span Earth History, Earth System Science, and Astrobiology. I use a variety of rock archives, including chemical sediments, glacial tills, and igneous rocks as records of the interactions between life, the oceans, the atmosphere, and the solid Earth over deep time. I access these archives through field work, analytical and isotope geochemistry, and numerical modeling to investigate deep time questions about Earth history.

www.benwjohnson.com/

Teaching Interests
Earth History, Sedimentary Geology, Field Camp, Astrobiology, Isotope Geochemistry

Recent Publications

Johnson, Benjamin W. and Wing, Boswell. accepted. Altered ocean crust reveals an 18O-enriched early Archean ocean. Nature Geoscience.

Johnson, Benjamin W. and Goldblatt, Colin. 2018. EarthN: A new Earth System Nitrogen Model. Geochemistry, Geophysics, Geosystems. 1-27.

Johnson, Benjamin W., Poulton, Simon F., and Goldblatt, Colin. 2017. Marine oxygen production and open water supported an active nitrogen cycle during the Marinoan Snowball Earth. Nature Communications. 8:1316

Johnson, Benjamin W. and Goldblatt, Colin. 2017. A secular increase in continental crust nitrogen during the Precambrian. Geochemical Perspectives Letters, 4:24-28

Johnson, Benjamin W., *Drage, Natashia, Spence, Jody, Hanson, Nova, El-Sabaawi, Rana, and Goldblatt, Colin. 2017. Measurement of geologic N using mass spectrometry, colourimetry, and a newly adapted fluorometry technique. Solid Earth, 8(2):307– 318.

Johnson, Benjamin W. and Goldblatt, Colin. 2015. The Nitrogen Budget of Earth. Earth Science Reviews, 148, 150-173