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Erik Hardoldson

Erik Haroldson

Assistant Professor


“I look forward to engaging students in my research interests, and student's interests as well.” Dr. Haroldson on what he enjoys about his interactions with students 
  • PhD ('17) - University of Wisconsin-Madison
  • MS ('14) - University of Wisconsin-Madison
  • BS ('06) - University of Minnesota-Duluth

Dr. Haroldson graduated with a PhD in Geosciences from the University of Wisconsin-Madison in 2017. After serving one year as an Associate Lecturer at the University of Wisconsin-Baraboo/Sauk County, he joined the faculty at APSU in the fall of 2018. Prior to graduate school he worked in the mineral (gold) exploration industry for 6 years. An interest in economic geology carried through his graduate studies, where he also developed expertise in mineralogy, petrology and geochemistry.

Dr. Haroldson's primary interest is to better understand ore deposits, valuable concentrations of metals in our planet, and the geologic processes which concentrated them. Ore deposits often form from the movement of fluids, laden with various metals, through the Earth's crust over enormous time-frames. He investigates fluids which were trapped in minerals during their formation, as well as stable and radiogenic isotopic signatures of minerals to understand the fluid source, timing, composition and geologic conditions (pressure, temperature) which operated in the distant past. As an economic geologist he works at the intersection of many disciplines, and is always looking for innovative ways to answer old and new questions alike.


  • Klyukin, Y.I., Haroldson, E.L., and Steele-MacInnis, M., 2020, A comprehensive numerical model for the thermodynamic and transport properties of H2O-NaCl fluids, Chemical Geology, vol. 557, p. 1-10, article 119840, https://doi.org/10.1016/j.chemgeo.2020.119840
  • Haroldson, E.L., Brown, P.E., Ashida, A., Valley, J.W., 2020, SIMS oxygen isotopes indicate Phanerozoic fluids permeated a Precambrian gold deposit, Chemical Geology, vol. 533, p. 1-17, article 119429, https://doi.org/10.1016/j.chemgeo.2019.119429
  • Haroldson, E.L., Brown, P.E., Bodnar, R.J., 2018, Involvement of variably-sourced fluids during the formation and later overprinting of Paleoproterozoic Au-Cu mineralization: Insights gained from a fluid inclusion assemblage approach, Chemical Geology, vol. 497, p. 115-127, https://doi.org/10.1016/j.chemgeo.2018.08.027.
  • Haroldson, E.L., Beard, B.L., Satkoski, A.M., Brown, P.E., Johnson, C.M., 2018, Gold remobilization associated with Mississippi Valley-type fluids: a Pb isotope perspective, Geological Society of America Bulletin, vol. 130, no. 9–10, p. 1583–1595, https://doi.org/10.1130/B31901.1.

Non Peer-Reviewed