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| Northwest Africa 17021 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 17021 This is an OFFICIAL meteorite name. Abbreviation: NWA 17021 Observed fall: No Year found: 2021 Country: (Northwest Africa) Mass:  589 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 31 approved meteorites classified as Lunar (basalt). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||
| Comments: | Approved 13 Sep 2024 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 113:
Northwest Africa 17021 (NWA 17021) (Northwest Africa) Purchased: 2021 Classification: Lunar meteorite (basalt) History: Found in northwest Africa, purchased by Bachir Salek in 2021. Physical characteristics: Fourteen pieces, the largest being 248 g, all with smooth to irregular exterior surfaces with indentations resembling large vesicles; patches of sandblasted fusion crust were also observed. Freshly broken surface reveals a fine-grained mix of dark gray and light brown grains, shiny maskelynite patches are present. Unbrecciated. Petrography: (C. Agee, UNM) Backscatter electron images shown mm-size patches of igneous-zoned pyroxenes. Olivines are typically smaller grains up to 500 μm. Maskelynite makes up approximately 25% of the modal mineralogy, ubiquitous ilmenite ~3%, minor troilite, chromite and kamacite blebs observed. Quench melt veins are present throughout. Geochemistry: (M. Spilde, UNM) Olivine Fa56.5±12.7, Fe/Mn=100±8, n=7; clinopyroxene Fs39.7±9.8Wo19.5±7.7, Fe/Mn=63±7, n=7; maskelynite An90.0±0.9Ab9.8±0.9, n=4. Clinopyroxene shows Fe-enrichment trends that are continuous from Mg-augite and Mg-pigeonite to subcalcic-ferroaugite. Classification: Lunar (mare basalt). Paired with NWA 14526, similar to Swayyah 001 and Swayyah 004. Specimens: 21.5 g including a probe mount on deposit at UNM, Mark Lyon holds 476 g, Bachir Salek holds the remainder of the total mass. | ||||||||||||||||||||||||||||||
| Data from: MB113 Table 0 Line 0: |
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| Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 113, in preparation (2024)
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| Geography: |
Statistics: This is 1 of 9927 approved meteorites from (Northwest Africa) (plus 1837 unapproved names) | ||||||||||||||||||||||||||||||