Geological Staff

• Michael DePangher

  • Experience
    • President and Senior Geologist, Spectrum Petrographics Inc. since 1992
      • Analytical petrography and lithogeochemical alteration studies
      • Research and development of petrographic thin sectioning techniques
      • Quality control of more than 25,000 thin sections annually
      • Qualified as expert witness in petrography
    • Consulting Economic Petrologist & Petrographer (1988-present)
      • Analytical petrography and lithogeochemical alteration studies on a wide variety of ore deposit types for over 50 companies internationally.
    • Exploration Geologist with Chevron Resources Co. (1976-1979)
  • Education
    • Ph.D. (1988) in Geology from The University of Utah
      • Dissertation entitled "Quantitative Assessment of Metasomatic Composition-Volume Changes: Techniques for Identifying Actual Protoliths and Conserved Components" Abstract
    • M.S. (1982) in Geology from The University of Utah
      • Thesis entitled "The Geology, Geochemistry, and Petrology of the Quinnesec Group, Marinette County, Wisconsin" Abstract
    • B.A. (1975) in Geology from The University of California at Santa Barbara

Geotechnical Staff

• Robert A. Vawdrey

  • Vice-President and Senior Petrographic Technician, Spectrum Petrographics Inc., since 1992
  • Owner and Senior Petrographic Technician, Pioneer Thin Sections (1984-1992)
  • Senior Petrographic Technician, Western Petrographic (1972-1984)