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Northwest Africa 13357 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13357 This is an OFFICIAL meteorite name. Abbreviation: NWA 13357 Observed fall: No Year found: 2020 Country: Algeria Mass: 38.9 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 3 approved meteorites classified as CK3-6. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CK chondrites, CK3 chondrites, and CV-CK clan chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 19 Jul 2020 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13357 (NWA 13357) Algeria Purchased: 2020 Mar Classification: Carbonaceous chondrite (CK3-6) History: Purchased by John Higgins in March 2020 from an Algerian dealer. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Very fresh specimen composed of discrete unequilibrated, granular, magnetite-bearing chondrules (apparent diameter 1040±680 µm, N = 22) plus some equilibrated Type 6 clasts and set in a finer grained matrix containing calcic plagioclase and Cr-magnetite. Type 6 clasts consist of sparse remnant chondrules within a recrystallized magnetite-bearing matrix. Geochemistry: Olivine in Type 6 clasts (Fa34.4±2.1, range Fa32.0-38.9, NiO = 0.5-0.7 wt.%, N = 7), low-Ca pyroxene (Fs27.3±0.1Wo0.9±0.0, range Fs27.2-27.3Wo0.9, N = 2), augite (Fs9.5Wo48.8), plagioclase (An82.1Or0.4; An54.7Or2.4; N = 2), magnetite (Cr2O3 = 5.8 wt.%), olivine in unequilibrated chondrule (Fa15.6±6.7, range Fa6.8-22.7, N = 5). Classification: Carbonaceous chondrite (CK3-6 breccia). Specimens: 8.3 g including one polished thin section at UWB; remainder with Mr. J. Higgins. | ||||||||||||||||||||||||||||||
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 1356 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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