Skip to Main Content

Richard Gaschnig

Richard Gaschnig
Dr. Richard GaschnigAssistant Professor

Research Interests

I am broadly interested in the use of radiogenic isotopes, stable isotopes, and trace elements to understand processes such as the formation and evolution of continents through the study of both igneous and sedimentary materials.

Education

  • Ph D: Geology, (2010), Washington State University - Pullman, WA
  • MS: Geology, (2005), University of North Carolina at Chapel Hill - Chapel Hill, NC
  • BS: Geology, (2003), University of Delaware - Newark, DE

Awards and Honors

  • LeClerc Graduate Fellowship (2010)
  • Tobacco Root Geological Society scholarship (2008)
  • Geological Society of America Graduate Research Grant (2007)
  • H. Walter and Jeanette Praetorius-Exxon Graduate Fellowship (2007)

Publications

  • Fayon, A., Tikoff, B., Kahn, M., Gaschnig, R. (2017) "Cooling and exhumation of the southern Idaho batholith," Lithosphere pp. L565–1
  • Gaschnig, R., Macho, A., Fayon, A., Schmitz, M., Ware, B., Vervoort, J., Kelso, P., LaMaskin, T., Kahn, M., Tikoff, B. (2017) "Intrusive and depositional constraints on the Cretaceous tectonic history of the southern Blue Mountains, eastern Oregon," Lithosphere pp. L554.1
  • Gaschnig, R., Rudnick, R.L., McDonough, W.F., Kaufman, A.J., Valley, J.W., Hu, Z., Gao, S., Beck, M.L. (2016) "Compositional evolution of the upper continental crust through time, as constrained by ancient glacial diamictites," Geochimica et Cosmochimica Acta 186: pp. 316-343
  • Gaschnig, R., Vervoort, J., Tikoff, B., Lewis, R. (2016) "Construction and preservation of batholiths in the northern US Cordillera," Lithosphere pp. L497-1
  • Li, S., Gaschnig, R., Rudnick, R.L. (2016) "Insights into chemical weathering of the upper continental crust from the geochemistry of ancient glacial diamictites," Geochimica et Cosmochimica Acta 176: pp. 96-117
  • Vervoort, J.D., Lewis, R.S., Fisher, C., Gaschnig, R., Jansen, A.C., Brewer, R. (2016) "Neoarchean and Paleoproterozoic crystalline basement rocks of north-central Idaho: Constraints on the formation of western Laurentia," Geological Society of America Bulletin 128:1-2 pp. 94-109
  • Chen, K., Walker, R.J., Rudnick, R.L., Gao, S., Gaschnig, R., Puchtel, I.S., Tang, M., Hu, Z. (2016) "Platinum-group element abundances and Re–Os isotopic systematics of the upper continental crust through time: Evidence from glacial diamictites," Geochimica et Cosmochimica Acta 191: pp. 1-16
  • Braudy, N., Gaschnig, R., Wilford, D., Vervoort, J., Nelson, C., Davidson, C., Kahn, M., Tikoff, B. (2016) "Timing and deformation conditions of the western Idaho shear zone, West Mountain, west-central Idaho," Lithosphere pp. L519–1
  • Vervoort, J., Fisher, C., Lewis, R., Baldwin, J., Wang, D., Jansen, A., Nesheim, T., Zirakparvar, N., McDonie, C., Gaschnig, R. (2016) "Evidence for Neoarchean to Paleoproterozoic crustal formation and modification in the northern U.S.," Geological Society of America
  • Greaney, A., Rudnick, R., Gaschnig, R. (2016) "Crustal sources of molybdenum. ," Mineralogical Magazine (Goldschmidt Meeting).
  • Gaschnig, R., Rudnick, R.L., McDonough, W.F. (2015) "Determination of Ga, Ge, Mo, Ag, Cd, In, Sn, Sb, W, Tl and Bi in USGS Whole-Rock Reference Materials by Standard Addition ICP-MS," Geostandards and Geoanalytical Research 39:3 pp. 371-379
  • Tang, M., Rudnick, R.L., McDonough, W.F., Gaschnig, R., Huang, Y. (2015) "Europium anomalies constrain the mass of recycled lower continental crust," Geology 43:8 pp. 703-706
  • Gaschnig, R., Rudnick, R.L., McDonough, W.F., Kaufman, A.J., Hu, Z., Gao, S. (2014) "Onset of oxidative weathering of continents recorded in the geochemistry of ancient glacial diamictites," Earth and Planetary Science Letters 408:0 pp. 87-99
  • Gaschnig, R., Vervoort, J.D., Lewis, R., Tikoff, B. (2013) "Probing for Proterozoic and Archean crust in the northern U.S. Cordillera with inherited zircon from the Idaho batholith," Geological Society of America Bulletin 125:1-2 pp. 73-88
  • Hu, Z., Zhang, W., Liu, Y., Chen, H., Gaschnig, R., Zong, K., Li, M., Gao, S., Hu, S. (2013) "Rapid bulk rock decomposition by ammonium fluoride (NH4F) in open vessels at an elevated digestion temperature," Chemical Geology 355: pp. 144-152
  • Gray, K., Watkinson, A., Gaschnig, R., Isakson, V. (2012) "Age and structure of the Crevice pluton: overlapping orogens in west-central Idaho?," Canadian Journal of Earth Science 49: pp. 709-731
  • Davis, J., Coleman, D., Gracely, J., Gaschnig, R., Stearns, M. (2012) "Magma accumulation rates and thermal histories of plutons of the Sierra Nevada batholith, CA," Contributions to Mineralogy and Petrology 163:3 pp. 449-465
  • Zhang, W., Hu, Z., Liu, Y., Chen, H., Gao, S., Gaschnig, R. (2012) "Total Rock Dissolution Using Ammonium Bifluoride (NH4HF2) in Screw-Top Teflon Vials: A New Development in Open-Vessel Digestion," Analytical Chemistry 84:24 pp. 10686-10693
  • Anfinson, O., Leier, A., Gaschnig, R., Embry, A., Dewing, K. (2012) "U-Pb and Hf isotopic data from Franklinian Basin strata: insights into the nature of Crockerland and the timing of accretion, Canadian Arctic Islands ," Canadian Journal of Earth Science 49: pp. 1316-1328
  • Gaschnig, R., Vervoort, J.D., Lewis, R.S., Tikoff, B. (2011) "Isotopic evolution of the Idaho batholith and Challis intrusive province, northern US Cordillera," Journal of Petrology 52:12 pp. 2397-2429
  • Gaschnig, R., Vervoort, J., Lewis, R., McClelland, W. (2010) "Migrating magmatism in the northern US Cordillera: in situ U–Pb geochronology of the Idaho batholith," Contributions to Mineralogy and Petrology 159:6 pp. 863-883
  • Gaschnig, R., Vervoort, J., Lewis, R., Dufrane, S. (2008) "Utilizing U-Pb geochronology of inherited zircon in the Atlanta lobe of the Idaho batholith as a probe of the deep crust in southern Idaho: a progress report," Northwest Geology 37: pp. 101-110

Contracts, Fellowships, Grants and Sponsored Research

  • Constraining the secular compositional evolution of the upper continental crust using ancient glacial deposits and creation of an upper crustal reference suite (2013), Grant - NSF Petrology and Geochemistry
    Gaschnig, R. (Co-Principal), Rudnick, R. (Principal), McDonough, W. (Co-Principal)