Adam, Does this material attract to a magnet? Being an H, I suppose it does...but maybe not.
John > Dear List Members, > > We would like to introduce NWA 2058 an extremely odd meteorite called a > plain "H" with no subclass. It is also known in the scientific circles as a > Psuedotachylite. Through a great deal of study NAU and the UW determined > this Psuedotachylite originated from the H chondrite parent body. It was > not thought of as being a meteorite at first because it looks completely > different than anything that had been seen before. Some may ask, How come > no metamorphic subclass? It is the most shocked chondrite yet discovered > with no chondritic features that can be measured for metamorphism meaning no > metamorphic subclass can be assigned. Another problem was what to call it, > an achondrite from a chondritic parent body or simply an H with the > qualifier Psuedotachylite or melt rock. This unique material has caused a > stir in the scientific community with laboratories requesting samples which > will make this a very well studied meteorite. > > Here is a brief description of this one-of-a-kind meteorite: > > NWA 2058 is an H (Pseudotachylite), Fa 17.1-18.4, S6 plus, W2/3 chondrite > found in Northwest Africa 2001. This unique meteorite cannot be subclassed > because of extreme mylonitization. Mylonitization is fusion of crushed rock > under high temperature by frictional heating. In other words, this > meteorite was formed by a hypervelocity impact on the surface of an asteroid > and cooled within milliseconds as it was ejected out into space. During the > impact event it was crushed and sheared simultaneously creating subparallel > veins in the direction of the material flow connecting elongated > metal-sulfide nodules, talk about interesting! Relic grains show evidence > of high strain rates, partially granulated clasts with undulatory > extinction, in contrast to shock features. The matrix consists mostly of > recrystallized olivine. The round objects are not chondrules but are impact > melted and quenched metal sulfide. Five stones with unusually smooth fusion > crusts were found adding up to 80 grams TKW. So far 17.1 grams has been > provided to science and a great deal was lost to cutting and polishing > leaving very little for collectors. Since this unusual meteorite is still > currently under study and other laboratories are requesting samples we plan > on preserving a good portion in our collection for future studies. > > I brought up that there are Hs listed with no subtype and was told this is > not the same situation as with this special meteorite. The reason for the > others is simply incomplete information. In some cases there was not enough > material to subclassify and in other cases the classifications were never > completed. In yet other cases the material was lost through time. The > classification on this unique meteorite is complete making it the only plain > H that has been fully classified with supporting data. > > Since we have no idea what something like this is worth we will let the > market decide by starting over a dozen prepared specimens out at just 99 > cents and see where they end up. Hopefully, the proceeds will be enough to > offset lab fees we incurred during the study of this material. This new > meteorite is so dark that is very difficult to photograph the features. I > will try to take some photomicrographs with a digital microscope in the next > few days. To see this new meteorite and over 100 interesting auctions check > out the ebay link below: > > http://members.ebay.com/aboutme/meteoritelab/ > > Thank you for looking and if you are bidding, good luck. > > Adam and Greg Hupe > The Hupe Collection > Team LunarRock > IMCA 2185 > > > > ______________________________________________ > Meteorite-list mailing list > [EMAIL PROTECTED] > http://www.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
