Hi Mendy, If you look at the literature, there are only a handful of brachinite oxygen data sets, so "anomalous" may be a poorly defined term. The brachinite trend could actually intersect or cross-over the TFL -- perhaps that is what this one is doing. Or, it could be terrestrial contamination, or as you suggest a exotic component, hard to tell at this point.
Carl ************************************* Carl B. Agee Director and Curator, Institute of Meteoritics Professor, Earth and Planetary Sciences MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 Tel: (505) 750-7172 Fax: (505) 277-3577 Email: a...@unm.edu http://meteorite.unm.edu/people/carl_agee/ On Wed, Jul 24, 2013 at 2:41 PM, Mendy Ouzillou <ouzil...@yahoo.com> wrote: > Carl, > > I understand the words, "heterogeneous oxygen isotopes" but not the meaning. > Does this imply two different parent bodies merged together? This of course > doesn't make sense because then it would be considered an anomalous > achondrite. I did not think the the O-isotopes were supposed to vary to the > degree that they can be considered heterogeneous. > > Thanks! > > Mendy Ouzillou > > ________________________________ > From: Carl Agee <a...@unm.edu> > To: jack satkoski <jacko...@yahoo.com> > Cc: meteoritelist meteoritelist <meteorite-list@meteoritecentral.com> > Sent: Wednesday, July 24, 2013 1:37 PM > Subject: Re: [meteorite-list] Dunite meteorites? > > The brachinite dunite is Northwest Africa 7904. > > ************************************* > Carl B. Agee > Director and Curator, Institute of Meteoritics > Professor, Earth and Planetary Sciences > MSC03 2050 > University of New Mexico > Albuquerque NM 87131-1126 > > Tel: (505) 750-7172 > Fax: (505) 277-3577 > Email: a...@unm.edu > http://meteorite.unm.edu/people/carl_agee/ > > > > On Wed, Jul 24, 2013 at 12:08 PM, Carl Agee <a...@unm.edu> wrote: >> >> Hi Jack, >> But there are dunite meteorites! I just classified a brachinite that is a >> dunite. Also the martian "C" in SNC is for the dunite Chassigny. Most PACs >> are olivine rich and some are dunites with 90% or more olivine. >> >> Carl Agee >> >> On Jul 24, 2013 10:55 AM, "jack satkoski" <jacko...@yahoo.com> wrote: >>> >>> Wondering why no predominately olivine or dunite meteorites exist? Does >>> this have something to do with proto planet size and crustal evolution? >>> >>> Thanks, >>> >>> Jack Satkoski >>> ______________________________________________ >>> >>> Visit the Archives at http://www.meteorite-list-archives.com >>> Meteorite-list mailing list >>> Meteorite-list@meteoritecentral.com >>> http://six.pairlist.net/mailman/listinfo/meteorite-list >>> >>> > ______________________________________________ > > Visit the Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-list > > ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
