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Northwest Africa 13245 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13245 This is an OFFICIAL meteorite name. Abbreviation: NWA 13245 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass: 966 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 100 approved meteorites classified as Eucrite-melt breccia. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 27 Jun 2020 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13245 (NWA 13245) (Northwest Africa) Purchased: 2019 Mar Classification: HED achondrite (Eucrite, melt breccia) History: Purchased in Agadir, Morocco by Aziz Habibi Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of lithic clasts (gabbroic to microgabbroic with poikilitic to equigranular textures) and related crystalline debris set within a finer grained, vesicular melt-textured matrix. Minerals in clasts are exsolved pigeonite, calcic plagioclase, silica polymorph, ilmenite, chromite (with variable Al and Ti contents) and troilite. The matrix contains strongly zoned pyroxenes (with ferroan rims of almost pyroxferroite composition) and acicular to plumose plagioclase. Geochemistry: Gabbroic clasts: Low-Ca pyroxene host (Fs60.9-62.6Wo2.4-4.6, FeO/MnO = 29-33, N = 5), augite exsolution lamellae (Fs27.6-28.3Wo43.1-44.1, FeO/MnO = 30-32, N = 5), plagioclase (An88.2-89.7Or0.2-0.5, N = 4). Matrix pyroxene: augite core (Fs26.4Wo44.2, Fe/MnO = 29), low-Ca pyroxene (Fs60.1Wo2.5, FeO/MnO = 31), ferroan pigeonite rim (Fs81.4Wo15.5, FeO/MnO = 38). Classification: Eucrite (melt-matrix breccia). Specimens: 23.3 g in the form of a polished endcut at UWB; remainder with Mr. A. Habibi. | ||||||||||||||||||||||||||||
Data from: MB109 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) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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