My current research interests are mostly in isotope geochemistry, metamorphic petrology, and Precambrian geochronology. Ongoing projects aimed at deciphering isotopic and chemical records of Precambrian thermotectonism and ore mineralization are based in the Wyoming Province (South Dakota and Montana) and in the Adirondack Lowlands (New York). Another ongoing project focuses on modeling the crystal-chemical controls on argon retention and closure temperatures in amphiboles and micas.
Yousafzai, Asim; Eckstein, Yoram; Dahl, P.S. Hydrochemical signatures of deep groundwater circulation in a part of the Himalayan foreland basin. Environmental Earth Sciences Vol. 59, no. 5. Berlin : Springer, Jan. 2010.
Frei, R., Dahl, P.S., Duke, E.F., Frei, K.M., Hansen, T.R., Frandsson, M.M., and Jensen, L.S., 2008, Trace element and isotopic characterization of Neoarchean and Paleoproterozoic iron formations in the Black Hills (South Dakota, USA): Assessment of chemical change during 2.9-1.9 Ga deposition bracketing the 2.4-2.2 Ga first rise of atmospheric oxygen: Precambrian Research, v. 162, p. 441-474.
Dahl, P.S., Terry, M.P., Jercinovic, M.J., Williams, M.L., Hamilton, M.A., Foland, K.A., Clement, S.M., and Friberg, L.M., 2005, Electron probe (Ultrachron) microchronometry of metamorphic monazite: Unraveling the timing of polyphase deformation in the eastern Wyoming craton (Black Hills, South Dakota): American Mineralogist, v. 90, p. 1712-1728.
McCombs, J.A., Dahl, P.S., and Hamilton, M.A., 2004, U-Pb ages of Neoarchean granitoids from the Black Hills, South Dakota, USA: Implications for evolution of the Archean Wyoming province: Precambrian Research, v. 130, p. 161-184.
Roberts, H.J., Dahl, P.S., Kelley, S.P., and Frei, R., 2002, New 207Pb-206Pb and 40Ar-39Ar ages from SW Montana, USA: Constraints on the Proterozoic and Archean tectonic and depositional history of the Wyoming Province: Precambrian Research, v. 117, p. 119-143.
American Geophysical Union
Geological Society of America â€“ Elected as Fellow, 2007; Served as KSU Membership Representative, 1980-1985.
Mineralogical Society of America â€“ Served as Associate Editor of American Mineralogist, 2006-present; Served as Member and Chairman, Distinguished Lecturer Committee, 2001-2004.
Northern Ohio Geological Society
Sigma Xi (National Research Honorary) â€“ Served as Treasurer of KSU Chapter, 1980-1982.
Office hours by appointment