Tom, First off, many of R pieces from the desert are oxidized a bit.
According to "Rocks from Space", these meteorites have very little free metal "floating around" in the makeup. Like normal chondrites with nickel iron. The metal is in the sulfide forms of pyrrhotite and pentlandite. The iron level in the olivine is the highest among chondrites. All that gives this type of meteorite a higher rate/chance of oxidation than others. Hope this helps, John ----- Original Message ----- From: "Tom aka James Knudson" <[EMAIL PROTECTED]> To: "meteorite-list" <[EMAIL PROTECTED]> Sent: Tuesday, February 11, 2003 6:58 PM Subject: [meteorite-list] NWA 753 > Hello List, I have a slice of NWA 753. It has some rust colored spots > through out the matrix. What Am I looking at? If it is rust, what rusted? > Thanks, Tom > The proudest member of the IMCA 6168 > > > > ______________________________________________ > 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
