Mike Tettenborn wrote: > Bilanga: ... wonder about the dark grey-green inclusions in the milky > light beige matrix. Is it possible for these inclusions to be eucritic?
Hello Mike and List, I don't think you are looking at a eucritic inclusion. If they are greyish green, I'd think they are hypersthene crystals (Mg,Fe)SiO3. > Does anyone else have sample with eucrite inclusions? Theoretically speaking, it is quite possible that a eucritic clast could be found in a diogenite because of the HED link, but I have only one allusion handy: SEARS D.W. (1978) The Nature and Origin of Meteorites, p. 73: 3.3.3. Ca-Poor Achondrites The diogenites are almost pure pyroxene (22-25% Fe end member) with very minor amounts of other minerals present in ordinary chondrites: olivine, troilite, metal, and chromite. They are also almost all brec- ciated (Mason 1962) and recently one was discovered which contained a eucrite fragment. Unfortunately, Sears doesn't tell us which diogenite he is refering to :-( The book was published in 1978, so "recently" might mean 10-20 years prior to publication of the book. The only non-Antarctic diogenite that would fit into this time frame would be Aioun el Atrouss. Anyone know anything about a eucritic inclusion in Aioun el Atrouss or any other diogenite? Best regards, Bernd P.S.: Congrats on your son's successful science fair contribution. Children are a product of their social surroundings, so his parents also deserve kudos! ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
