The aubrites were some of the rarest of the stony meteorites until 1948. That changed after a brilliant fireball on February 18, 1948. Fireball was followed by a loud noise. A very large shower of meteorites fell over a large area of Norton County (Kansas) and Furnas County (Nebraska). It is estimated that over 100 stones fell, biggest weighed 2360 lb and the second most massive weight in at 131,5 lb. The main mass made a penetration hole 10 feet deep. A field party from the Institute of Meteoritics, University of New Mexico wrapped the huge meteorite in a protective plaster jacket. Silmilar methods are used by the paleontologists to move the fragile bones. This way the largest intact achondrite ever found was able to be moved to the University.Aubrites have a pale beige-colored fusion crust with a white interior. These meteorites are almost pure magnesium silicate. They also contain small amounts of exotic minerals not found on the Earth including the rare sulfides oldhamite and niningerite.
All the pieces are fragments and they come with University of New Mexico numbers and labels: N 15415 135,1g N 2313 3,1gN 2311 6,1g N 2607 2,3gN 2365 4,6g N 2605 2,1gN 2108 4,2g N 2609 2,1gN 2312 3,9g N 2316 1,9gN 2608 3,6g N 2606 1,8g The biggest specimen is exchanged by Jim Strope. He made an exchange with the museum with a Tissint meteorite. The Tissint meteorite is a Martian meteorite that fell in Tata Province in the Guelmim-Es Semara region of Morocco on July 18, 2011. This 135g piece is the biggest piece out of this trade. The second biggest was around 90g and all the rest was smaller. At the same time there was also another trade by some other dealer. That deal was similar and mostly small pieces as the museum did not want to trade big pieces. These trades brought a lot of small fragments to the meteorite market and I assume that the rest of small pieces are from these two deals. The other pieces are bought from Arnaud, owner of The Tricottet Collection.
Field Guide to Meteors and Meteorites: O. Richard Norton, Lawrence A. Chitwood
Exchanged emails with Jim Strope
Photo of the main mass: Jim Strope
Jarkko Kettunen Meteorite Collection © 2018