Theodore J. Bornhorst

Theodore J. Bornhorst


  • Executive Director, A.E. Seaman Mineral Museum
  • PhD, MS, Geology, University of New Mexico
  • BS, Geology, Michigan Technological University


Theodore J. Bornhorst is the Executive Director of Michigan Technological University's A.E. Seaman Mineral Museum. He became the Director of the museum in 2003 after serving as the Chair of the Department of Geological and Mining Engineering and Sciences for five years and as President of the University Senate for four years. Bornhorst oversees all aspects of the museum and plays a key role in reaching the museum's goals.

Bornhorst was the point person for the museum in the process leading to construction of and design of a new permanent home for the museum at 1404 E. Sharon Avenue in 2010-2011. He supervised and contributed to packing and unpacking of the museum's collection and exhibit cases. In 2015, Bornhorst negotiated a collaborative and mutually beneficial agreement with the University of Michigan to preserve the University of Michigan's mineral collection through its transfer to the museum with museum obtaining co-ownership.

Bornhorst is a professor of Economic and Engineering Geology, and he has taught a variety of courses, most recently Mineralogy and Mineral Deposits. He is author or co-author of over 100 reviewed technical publications and over 120 abstracts/presentations.  He continues to engage in research, and his research activities have included collaboration with the Geological Survey of Finland since 1988.  Bornhorst was awarded the annual Goldich Medal in 2008 from the Institute on Lake Superior Geology for his outstanding contributions to the understanding of Lake Superior geology.  He received a commendation in 2004 from Michigan Governor Granholm for his service to the State of Michigan for enactment of Michigan's nonferrous metallic mining regulations.  He is a fellow of the Society of Economic Geologists and the Geological Society of America.

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