Paul Spry

Paul G. Spry

Professor
Economic Geology/Mineralogy/Metamorphic petrology

256 Science I
Dept. of Geological and Atmospheric Sciences
Iowa State University
Ames, IA 50011
Phone: (515) 294-9637
Email: pgspry@iastate.edu 

Education 
B.S. (with Honors) University of Adelaide, 1977
M.S. University of Adelaide, 1979
Ph.D. University of Toronto, 1984



Research Interests 
Dr. Spry’s research interests are in economic geology, mineralogy and petrology, and include the geochemistry of metallic mineral deposits. He is particularly interested in the petrological, mineralogical, structural, geochronological (Re-Os), light stable isotope (S, C, O and H), and fluid inclusion characteristics of epithermal and mesothermal gold deposits, as well as the effects of metamorphism on massive sulfide deposits. Current research projects include: stable tellurium isotopes of tellurides in gold-silver telluride deposits; the origin of gold telluride deposits in Greece, and Fiji; the use of trace elements in oxides and silicates as exploration guides to metamorphosed Cu-Pb-Zn-Ag ores in the Kanmantoo Group, South Australia and the Stollberg Pb-Zn-Ag ore field, Sweden; the origin of meta-exhalites associated with metamorphosed massive sulfides in the southern Curnamona Province, Australia (including the Broken Hill Pb-Zn-Ag deposit); the origin of nodular sillimanite rocks and their genetic relationship to metamorphosed massive sulfide deposits; and the crystallographic characterization of precious metal sulfides and sulfosalts (see new sulfosalt “Spryite” named after Spry; PDF).

Research Projects 

  1. Trace element chemistry of common silicates (garnet, biotite, staurolite, chlorite), oxides (gahnite, magnetite), and sulfides (pyrite, pyrrhotite, chalcopyrite, and sphalerite) as guides in the exploration for metamorphosed massive sulfide deposits in the Broken Hill domain (New South Wales, Australia), the Bergslagen district (Sweden), and the Kanmantoo Group, South Australia
  2. The mineralogy and geochemistry (fluid inclusions and stable isotopes) of epithermal and mesothermal gold deposits and porphyry style copper and/or molybdenum deposits, Greece (with Panos Voudouris, University of Athens; Vasilios Melfos, Aristotle University of Thessaloniki)
  3. Mineralogy and crystallography of sulfides, sulfosalts, and tellurides (with Luca Bindi, University of Florence)
  4. Stable tellurium isotopes (with Edwin Shauble, UCLA; Simon Jackson, Geological Survey of Canada; Ryan Mathur, Juniata College)

Teaching 
GEOL 105 Gems and Gemstones
GEOL 316 Optical Mineralogy
GEOL 365 Igneous and Metamorphic Petrology
GEOL 420/520 Mineral Resources
GEOL 507 Midwestern Geology Field Trip
Click here for Course Descriptions

Recent Refereed Publications
Fornadel, A.P., Spry, P.G., Schauble, E.A., Hagneghadar, M.A., Jackson. S.E., and Mills, S.J., 2017, Theoretical and measured stable Te isotope fractionation in tellurium-bearing minerals in precious metal hydrothermal ore deposits. Geochimica et Cosmochimica Acta, 0.1016/j.gca.2016.12.025.

Saintilan, N.J., Creaser, R.A., and Spry, P.G., 2017, Re-Os systematics of löllingite and arsenopyrite in granulite facies garnet rocks: Insights into the thermal evolution of the Broken Hill block during the Early Mesoproterozoic (New South Wales, Australia), Canadian Mineralogist, in press.

Kelley, K.D., and Spry, P.G., 2016, Critical metals associated with alkaline-rock related epithermal gold deposits. Reviews in Economic Geology, v. 18, p. 195-216.

O’Brien, J.J., Spry, P.G., Teale, G.S., Jackson, S.E., and Rogers, D., 2015, Gahnite composition as a means to fingerprint metamorphosed base metal deposits. Journal of Geochemical Exploration, v. p. 48-61.

Steadman, J.A., and Spry, P.G., 2015, Metamorphosed Proterozoic Zn-Pb-Ag mineralization in the Foster River area, northern Saskatchewan, Canada. Economic Geology, v. 110, p. 1193-1214.

O’Brien, J.J., Spry, P.G., Teale, G.S., Jackson, S.E., and Rogers, D., 2015, Major and trace element chemistry of gahnite as an exploration guide to Broken Hill-type Pb-Zn-Ag mineralization in the Broken Hill domain, New South Wales, Australia. Economic Geology, v. 110, p. 1027-1057.

O’Brien, J.J., Spry, P.G., Nettleton, D., Ruo, X., Teale, G.S., Jackson, S.E., and Rogers, D., 2015, Random forests as a statistical method for distinguishing gahnite compositions as an exploration guide to Broken Hill-type Pb-Zn-Ag deposits in the Broken Hill domain, Australia. Journal of Geochemical Exploration, v. 149, p. 74-86.

Bristol, S.K., Spry, P.G., Voudouris, P., Melfos, V., Mathur, R.D., Fornadel, A.P., Sakellaris, G.-A. 2015, Geochemical and geochronological constraints on the formation of shear-zone hosted Cu-Au-Bi-Te mineralization in the Stanos area, Chalkidiki, northern Greece. Ore Geology Reviews, v. 66, p. 266-282.

Bindi, L., Stanley, C.J., and Spry, P.G., 2015, Cervelleite, Ag4TeS: solution and description of the crystal structure. Mineralogy and Petrology, v. 109, p. 413-419.

Bindi, L., Stanley, C.J., and Spry, P.G., 2015, New structural data reveal benleonardite as a member of the pearceite-polybasite group. Mineralogical Magazine, v. 79, p. 1217-1227.

Corriveau, L., and Spry, P.G., 2014, Metamorphosed hydrothermal ore deposits, in Scott, S.D., Geochemistry of Mineral Resources, Treatise on Geochemistry 2nd Edition, Elsevier, New York, v. 13, p. 175-194.

Spry, P.G., Mathur, R.D., Bonsall, T.A., Voudouris, P., C., and Melfos, V., 2014, Re-Os evidence for mixed source components in carbonate-replacement Pb-Zn-Ag deposits in the Lavrion district, Attica, Greece. Mineralogy and Petrology, v. 108, p. 503-513.

Bindi, L., Bonazzi, P., Zoppi, M., and Spry, P.G., 2014, Chemical variability in wakabayashilite: a real feature or an analytical artifact? Mineralogical Magazine, v. 78, p. 693-702.

Fornadel, A.P., Spry, P.G., Mathur, R.D., Jackson. S.E., Chapman, J.B., and Girard, I., 2014, Methods for the determination of Te isotopes of minerals in the system Au-Ag-Te by MC-ICP-MS. Journal of Analytical and Atomic Spectroscopy, v. 29, p. 623-647.

Full Publication List