http://www.rocksfromspace.org/February_11_2008.html
This R3-6 Rumuruti chondrite (formerly Carlisle Lakes grouplet) is so fresh and unweathered that its sulfides (troilite, pyrrhotite, and pentlandite) glitter like finest, molten gold dust and this glitter is everywhere all over its matrix, in its dark clasts as well in the lighter-colored clasts. Professor Greshake*, who analyzed and classified this R chondrite writes that FeNi metal is very rare and so I am very glad I detected a very small, rectangular (0.3 x 0.1 mm) metal speck in my 5.621-gram slice of this 49.7-gram exotic beauty! According to Hutchison, R chondrites have a mean chondrule diameter of 0.3-0.5 mm and the ones I measured in my slice are in this range: 0.25-0.45 mm (approx.). * http://www.chladnis-heirs.com/special-nwa5035.html Cheers, Bernd ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
