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Northwest Africa 15501 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15501 This is an OFFICIAL meteorite name. Abbreviation: NWA 15501 Observed fall: No Year found: 2022 Country: (Northwest Africa) Mass: 2.35 kg | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 136 approved meteorites classified as Eucrite-unbr. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 7 Jan 2023 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 112:
Northwest Africa 15501 (NWA 15501) (Northwest Africa) Purchased: 2022 Classification: HED achondrite (Eucrite, unbrecciated) History: Purchased by Nicholas Gessler in 2022 from Moroccan dealers. Physical characteristics: Five very similar subangular stones (1012, 630, 220, 380, and 110 g) almost completely coated by thin semi-glossy, black fusion crust. Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Thin sections of two stones (NG-EZ, NG-FR) were studied. Both exhibit identical unbrecciated subophitic, diabasic texture (mean grainsize ~0.5 mm) with mineralogy dominated by exsolved pigeonite and calcic plagioclase, together with accessory silica polymorph, ilmenite, Ti-chromite, troilite, Fe metal and rare zircon. Geochemistry: Pigeonite hosts (Fs56.8-60.3Wo8.6-4.9, FeO/MnO = 30-35, N = 15), augite exsolution lamellae (Fs28.4-31.8Wo27.9-33.1, FeO/MnO = 30-34, N = 11), plagioclase (An85.5-88.5Or0.7-0.4, N = 15). Classification: Eucrite (unbrecciated, diabasic). Specimens: 47.5 g plus two polished thin sections at UWB; remainder with Mr. N. Gessler. | ||||||||||||||||||||||||||||
Data from: MB112 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) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) Gessler: Nicholas Gessler, 2010 Calgary Lane, Los Angeles, CA 90077, United States (private address; updated 7 Jul 2016) BrownU: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 2024) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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