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| Northwest Africa 15251 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 15251 This is an OFFICIAL meteorite name. Abbreviation: NWA 15251 Observed fall: No Year found: 2021 Country: (Northwest Africa) Mass:  300 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 11 approved meteorites classified as LL3-5. [show all] Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||
| Comments: | Approved 1 Oct 2022 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 111:
Northwest Africa 15251 (NWA 15251) (Northwest Africa) Purchased: 2021 Classification: Ordinary chondrite (LL3-5) History: A single piece weighing 300 grg ams was found in northwest Africa. Adrián Contreras Gómez (CRATER meteorites) purchased the sample in 2021 from the Saharawi meteorite dealer Yahdih Buhali Omar. Physical characteristics: The exterior of the sample is lack fusion crust and is brown in color. The cut face shows the sample is a breccia composed of several recrystallized chondritic lithologies set within a host of chondrules, FeNi metal and FeS grains. Petrography: Description and classification (A. Love, App) Sample shows a brecciated texture composed of recrystallized chondritic clasts and impact melt clasts set within a host of close-packed, zoned chondrules and fragments with an average apparent diameter of 817 μm (n=96). Within recrystallized clasts, grainsize of secondary plagioclase=40µm (n=22). Sample contains ~2.4 vol% FeNi metal. Additional minerals are: albitic plagioclase, troilite, phosphate and chromite. Geochemistry: (A. Love, App) Olivine (Fa15.6±8.9, Fe/Mn=52.6±20.8, Cr2O3 in Fa>2=0.15±0.19 n=15); low Ca pyroxene (Fs14.9±8.5Wo1.0±0.6, Fe/Mn=29.0±14.5, n=14). Classification: Ordinary chondrite (LL3-5 C-S4 W1) Based on mineral compositions, average chondrule diameter, brecciated texture, metal abundance and grainsize of secondary plagioclase, sample is an LL3-5 breccia. Specimens: Adrián Contreras Gómez (CRATER meteorites) holds the main mass. An endcut weighing 39.41 g and a polished thin section are on deposit at App. | ||||||||||||||||||||||||||||||
| Data from: MB111 Table 0 Line 0: |
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| Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) AMS: Australian Museum, 6 College Street, Sydney, NSW 2010, Australia (institutional address; updated 18 Oct 2011) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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| Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) | ||||||||||||||||||||||||||||||