|
Northwest Africa 8701 | |||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 8701 This is an OFFICIAL meteorite name. Abbreviation: NWA 8701 Observed fall: No Year found: 2014 Country: Mali Mass: 72 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 334 approved meteorites classified as Lunar (feldsp. breccia). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||
Comments: | Approved 28 Dec 2014 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 103:
Northwest Africa 8701 (NWA 8701) Mali Purchased: 2014 Sep Classification: Lunar meteorite (feldspathic breccia) History: Purchased by Stefan Ralew in September 2014 in Erfoud, Morocco. Physical characteristics: Single stone (72 g) lacking fusion crust and composed of angular, mostly whitish clasts in a very dark gray matrix with some crosscutting veins of vesicular glass. Petrography: (A. Irving and S. Kuehner, UWS) Fragmental olivine-poor breccia composed of mineral clasts in a finer matrix. Minerals include anorthite, pigeonite, orthopyroxene, augite, ilmenite and merrillite, along with rare olivine, Cr-armalcolite and kamacite. Geochemistry: Orthopyroxene (Fs27.0Wo2.6; FeO/MnO = 70, N = 1), ferroan pigeonite (Fs53.0Wo16.8, FeO/MnO = 65, N = 1), pigeonite (core Fs26.5Wo19.8; FeO/MnO = 54; rim Fs71.6Wo25.2; FeO/MnO = 85), augite (Fs23.4Wo41.0, FeO/MnO = 58, N = 1), olivine (Fa30.4, FeO/MnO = 92; Fa11.3, FeO/MnO = 117, N = 2), plagioclase (An96.1-96.5Or0.1-0.5, N = 2). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave the following mean abundances (in wt.%) FeO 5.2, Na2O 0.44; (in ppm) Sc 11.8, La 6.0, Sm 2.5, Eu 0.85, Yb 2.3, Lu 0.32, Th 1.7. Classification: Lunar (feldspathic fragmental breccia). This specimen contains much less olivine than most lunar feldspathic breccias, but some of the olivine that is present is very magnesian. Specimens: 14.4 g including one polished endcut at UWB; main mass with Ralew. | ||||||||||||||||||||||||||||||
Data from: MB103 Table 0 Line 0: |
|
||||||||||||||||||||||||||||||
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) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address) |
||||||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
| ||||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 112 approved meteorites from Mali (plus 3 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
| ||||||||||||||||||||||||||||||
Revision history: |
This lists important revisions made to data for this record.
|