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| Northwest Africa 6275 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 6275 This is an OFFICIAL meteorite name. Abbreviation: NWA 6275 Observed fall: No Year found: 2010 Country: Mauritania Mass:  1.3 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 336 approved meteorites classified as Lunar (feldsp. breccia). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||
| Comments: | Approved 15 Apr 2011 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 99:
Northwest Africa 6275 (NWA 6275) Mauritania Found: 2009 Classification: Lunar meteorite (feldspathic breccia) History: Reportedly found in Mauritania and purchased by Norbert Classen in February 2010 from a dealer in Agadir, Morocco. Physical characteristics: Five small pale gray stones totaling 1.3 g. Petrography: (A. Irving and S. Kuehner, UWS) Fine-grained recrystallized breccia composed of larger plagioclase grains poikilitically enclosing small grains (<100 μm) of pigeonite, subcalcic augite, olivine, Ti-chromite, ilmenite, troilite and metal. Geochemistry: Olivine (Fa41.9-42.3, FeO/MnO = 81-89), plagioclase (An92.2-96.7Or0.3-<0.1), pigeonite (Fs31.0-32.0Wo11.5-14.1, FeO/MnO = 62-68), subcalcic augite (Fs19.3-19.6Wo37.1-36.9, FeO/MnO = 50-62). Bulk composition (R. Korotev, WUSL): FeO 3.3 wt%, Sc 7.1 ppm, Sm 0.40 ppm, Th 0.11 ppm. Classification: Achondrite (lunar, granulitic feldspathic breccia). This meteorite has essentially the same texture, mineralogy and mineral compositions as NWA 3163, NWA 4483 and NWA 4881 (which are different portions of one naturally broken mass). The bulk composition of NWA 6275 is somewhat similar to that of the other specimens, although a little more felsic. Yet, given the fine scale mineralogical heterogeneity in all of these specimens, a pairing relationship among all of them seems likely. Specimens: A 0.3 g polished piece is on deposit at UWS. Mr. N. Classen holds the remaining material (except for one stone consumed in bulk analyses). | ||||||||||||||||||||||||||||||
| Data from: MB99 Table 0 Line 0: |
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| Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011) Classen: Norbert Classen, Am Lindenplatz 1, 79356 Eichstetten, Germany; Website (private address) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
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Geography:
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Statistics: This is 1 of 221 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters) | ||||||||||||||||||||||||||||||
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| Also see: |
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| Revision history: |
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