Hi Adam, What does all this mean?
-Walter ----------------------------------------------------- ----- Original Message ----- From: "Adam Hupe" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, February 22, 2005 3:43 PM Subject: [meteorite-list] NWA 3118 CV3 Chondrule-Field Update > Dear List Members, > > There was some question about the strange clasts in the NWA 3118 CV3s. They > looked like CO3 chondrule-fields to me so I had them studied. Oxygen > isotope studies were performed at Carnegie and Petrologic/Microprobe work > was performed at UW. Here are the most interesting results: > > Northwest Africa 3118, additional data > Morocco > Purchased 2003 December > CV3 chondrite > A small stone representing part of the main mass held by A. and G. Hup� > (Hup�) was found to contain a dark inclusion measuring approximately 9 cm by > 2.5 cm by 1 cm. Microprobe examination of the inclusion by A. Irving and S. > Kuehner (UWS) shows it to consist of small chondrules and chondrule > fragments composed of very magnesian olivine (Fa1.1) with marginal Fe-rich > reaction zones (Fa36.9) against a porous matrix composed of felted blades of > relatively ferroan olivine (Fa40.9-45.9) with accessory troilite and > pentlandite. This clast has the attributes of Type A/B dark inclusions > described by Brearley and Jones (1998, p. 3-227), and the textures suggest > that it may have formed by partial sublimation of original chondrules and > re-condensation. Oxygen isotope analysis by D. Rumble (CIW) of acid-washed > whole inclusion material by laser fluorination gave replicate values of ?17O > = +0.08, -0.18; ?18O = 5.14, 4.99; ?17O = -2.63, -2.81 per mil, > respectively, which plot on the best fit line for whole rock CV chondrites. > > Here is a specimen that clearly demonstrates what the above report > describes: > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6513101418 > > I hope you found the above data as interesting as I did. > > Kind Regards, > > ------------------------------------ > Adam Hupe > The Hupe Collection > Team LunarRock > IMCA 2185 > [EMAIL PROTECTED] > > > > > ______________________________________________ > Meteorite-list mailing list > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list > ______________________________________________ Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
