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Mifflin Meteorite Results Published

Wed, 03/06/2013 - 13:37 -- pheck

Specimens of the Mifflin meteorite at the Field Museum. Photo credit Thomas Stephan.

The first scientific paper describing the almost local meteorite Mifflin that fell on April 14, 2010 in southwestern Wisconsin got published this week in the peer-reviewed journal Meteoritics & Planetary Science. The Robert A. Pritzker Assistant Curator for Meteoritics and Polar Studies Philipp Heck is a member of the international consortium who studied the space rock and co-author of the study. A large specimen of Mifflin was donated by meteorite collector Terry Boudreaux to the Field Museum shortly after the fall. This enabled timely analysis of the short-lived cosmogenic radionuclides, which would have otherwise decayed to below our detection limit. The team found that the meteorite was an L chondrite 1-2 feet in diameter before it entered Earth's atmosphere. The team also determined its cosmic-ray exposure age, the space travel time from its parent asteroid to Earth), of about 25 million years and contributed to the petrographic description with the Field Museum specimen.
Read the summary and paper in Meteoritics & Planetary Sciences.