HI ALL i have sale thnis specimen, of nwa 5790 nakhlite unique structure and not paied to any other martian nakhlite
this 63.4 gr, http://www.flickr.com/photos/azizhabibi/4138934360/ http://www.flickr.com/photos/azizhabibi/4138168819/ http://www.flickr.com/photos/azizhabibi/4138167219/ please maker me your offer , and if you are interetsed in small fragment send me an email i may break it in small fragment, so i need a list of potential buyers of small fragments thanks aziz habibi http://tin.er.usgs.gov/meteor/metbull.php?code=49470 Northwest Africa 5790 Basic information Name: Northwest Africa 5790 This is an OFFICIAL meteorite name. Abbreviation: NWA 5790 Observed fall: No Year found: 2009 Country: (Northwest Africa) Mass: 145 g Classification history: Recommended: Martian (nakhlite) [explanation] : Planetary meteorites, Martian meteorites Comments: Approved 29 Nov 2009 Writeup Writeup from MB 97: Northwest Africa 5790 Erfoud, Morocco Find: spring 2009 Classification: Martian (nakhlite) History: Found in the desert by nomads and purchased by A. Habibi in Erfoud (Morocco). Physical characteristics: Two stones for a TKW of 145 g, with mm-sized phenocrysts in a groundmass with pinkish luster. Very friable. Petrography: (A. Jambon, O. Boudouma, D. Badia, UPVI ) Dominated by mm-sized euhedral augite with sharp rim zoning and faint irregular zoning inside. Subsidiary euhedral olivine phenocrysts are of similar size, zoned to their core. Interstitial mesostasis contains dendritic oxides, pyroxene, feldspar, silica, phosphate and glass. Minor Cl-amphiboles in trapped melt inclusions. Mode from BSE images: augite 51.2, olivine 9.1, mesostasis 39.7, titanomagnetite <1%. Mineral compositions (SEM and EMPA; as above) and geochemistry (ICP-MS; J-A Barrat UBO): zoned augite core (En35Fs24Wo40 and Fe/Mn = 32) sharp rim (En20Fs43Wo36 and Fe/Mn = 42), olivine progressively zoned from the core (Fa65 with Fe/Mn = 47) to the rim (Fa80 with Fe/Mn = 40). Rare Ti-magnetite phenocrysts. Uv32Mt56Sp7Ct4 with fine ilmenite exsolutions. In the mesostasis, dendritic crystals of Ti Magnetite: Uv52-74Mt38-19, acicular pyroxene (En7Fs47Wo46 and Fe/Mn = 55) and olivine Fa88. Plagioclase An16Ab79Or5. Augite with 2-3 wt% Cl. Bulk major-element chemistry: similar to other nakhlites; element ratios confirm Martian origin (K/La =473, Ga/Al =3.7 104 [sic]); significantly higher proportion of mesostasis than other nakhlites with the highest Th, U and rare earth elements (REE) concentrations ever reported for a nakhlite (e.g. , Th = 0.85 ppm); REE pattern characterized by a strong light REE enrichment (La/Yb)n = 5.8, and Eu/Eu* = 0.86. Oxygen isotopes (R. Greenwood and I. Franchi, OU ): ∆17O = 0.30‰. Type specimens: A total sample mass of 16 g is on deposit at UPVI ; 2.77 g UAlberta; 1.25g UWS ; main mass, Habibi. ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
