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| Northwest Africa 6950 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 6950 This is an OFFICIAL meteorite name. Abbreviation: NWA 6950 Observed fall: No Year found: 2011 Country: (Northwest Africa) Mass:  1649 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 13 approved meteorites classified as Lunar (gabbro). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||
| Comments: |
Approved 16 Dec 2011 Revised 29 Jan 2012: revised mass | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 100:
Northwest Africa 6950 (NWA 6950) (Northwest Africa) Purchased: 2011 Aug Classification: Lunar meteorite (gabbro) History: Reported to be found near the border between Mali and Algeria in June 2011, and purchased from the finder by Adam Aaronson in August 2011. Physical characteristics: A single yellowish-green stone (1649 g, broken into 8 pieces) with partial fusion crust. Thin black shock veins are visible in the interior. Petrography: (A. Irving and S. Kuehner, UWS) Relatively coarse grained with a cumulate igneous texture. Aggregate dominated by olivine, low-Ca pyroxene, pigeonite, and subcalcic augite, with interstitial very calcic plagioclase. Accessory minerals are ilmenite, Ti-chromite, armalcolite, troilite, baddeleyite, taenite and merrillite with rare zirconolite and K-feldspar. Geochemistry: Olivine (Fa31.9-32.7, Fe/Mn=85-97), low-Ca pyroxene (Fs27.1-28.1Wo4.8-4.5, Fe/Mn=47-55), pigeonite (Fs25.6±0.0Wo9.2-11.1, Fe/Mn=47-52), subcalcic augite (Fs13.9Wo36.9, Fe/Mn=41), plagioclase (An87.9-93.0Or1.1-0.9). Classification: Achondrite (lunar, gabbro). This specimen is texturally and mineralogically identical to NWA 2977 and the olivine gabbro clasts in NWA 773, NWA 2700, NWA 2727 and NWA 3333, and evidently is paired with those stones. Specimens: A total of 20.1 g of sample and one polished thin section are on deposit at UWS. The main mass is held by Aaronson. | ||||||||||||||||||||||||||||||
| Data from: MB100 Table 1 Line 1551: |
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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) Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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| Photos: |
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| Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||
| Crosslinks: |
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| Also see: |
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| Revision history: |
This lists important revisions made to data for this record.
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