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Northwest Africa 13308 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13308 This is an OFFICIAL meteorite name. Abbreviation: NWA 13308 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass: 168.1 g | ||||||||||||||||||||||||||||||
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 13 Jun 2020 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13308 (NWA 13308) (Northwest Africa) Purchased: 2019 Dec Classification: HED achondrite (Eucrite, unbrecciated) History: Purchased by John Divelbiss in December 2019 from Mike Miller, who had acquired the stone from a Moroccan dealer in 2017. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) The specimen has a microgabbroic texture and is crosscut by multiple quenched shock melt veins enclosing crystal debris derived from the clasts. Minerals are exsolved pigeonite and calcic plagioclase with accessory silica polymorph, fayalite, Ti-Al chromite, ilmenite (some more Cr-rich), merrillite, baddeleyite, zircon and troilite. Geochemistry: Low-Ca pyroxene (Fs57.8-60.0Wo2.5-4.8, FeO/MnO = 30-33, N = 6), high-Ca pyroxene (Fs25.9-26.7Wo43.3-44.2, FeO/MnO = 29-32, N = 6), fayalite (Fa84.6-87.8, FeO/MnO = 45-51, N = 2), plagioclase (An89.2-90.5Or0.4-0.5, N = 4). Classification: Eucrite (unbrecciated, microgabbroic, shock melt-veined). Specimens: 20.3 g including one polished thin section at UWB; remainder with Mr. J. Develbiss. | ||||||||||||||||||||||||||||||
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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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