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Northwest Africa 13358 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13358 This is an OFFICIAL meteorite name. Abbreviation: NWA 13358 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass: 990 g | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 8862 approved meteorites (plus 5 unapproved names) classified as L5. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||
Comments: | Approved 4 Jul 2020 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13358 (NWA 13358) (Northwest Africa) Purchased: 2019 May Classification: Ordinary chondrite (L5) History: Purchased by Mbark Arjdal in May 2019 from a dealer in Timbuktu, Mali. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Sparse, indistinct chondrules are present within a recrystallized matrix (stained orange-brown in thin section) containing chromite, troilite, pyrrhotite, merrillite. Secondary terrestrial weathering products include goethite (replacing primary metal), patchy Fe-Ni-Mn-bearing phosphate (?arupite) within merrillite, and a Ca sulfate phase. Geochemistry: Olivine (Fa24.9±0.2, range Fa24.6-25.2, N = 5), low-Ca pyroxene (Fs20.8±0.1Wo1.5±0.2, range Fs20.7-20.9Wo1.2-1.7, N = 5), augite (Fs7.9±0.4Wo44.8±0.4, range Fs7.6-8.3Wo44.5-45.2, N = 3). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.16. Classification: Ordinary chondrite (L5). Specimens: 51.5 g including one polished thin section at UWB; remainder with Mr. M. Arjdal. | ||||||||||||||||||||||||||||||||
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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