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Northwest Africa 13729 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13729 This is an OFFICIAL meteorite name. Abbreviation: NWA 13729 Observed fall: No Year found: 2019 Country: Algeria Mass: ![]() | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 361 approved meteorites classified as LL3. [show all] Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||||
Comments: | Approved 21 Feb 2021 | ||||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 110:
Northwest Africa 13729 (NWA 13729) Algeria Purchased: 2019 Classification: Ordinary chondrite (LL3) History: Purchased by Jesper Grønne in 2019 from a Moroccan dealer. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed, closely-packed glass-bearing chondrules (apparent diameter 800 ± 450 µm, N = 25) are set in a fine grained matrix containing stained kamacite, troilite and minor secondary Ca sulfate. Geochemistry: Olivine (Fa16.4±14.1, range Fa1.5-45.8, N = 5; Cr2O3 in ferroan olivine 0.06-0.33 wt.%, mean 0.16 wt.%, sd 0.08 wt.%, N = 18), low-Ca pyroxene (Fs15.1±6.4Wo1.8±1.5, range Fs4.8-24.5Wo0.3-3.3, N = 6), pigeonite (Fs9.4Wo16.5), augite (Fs16.3Wo43.2). Magnetic susceptibility log χ (× 10-9 m3/kg)=4.41. Classification: Ordinary chondrite (LL3). Suggested subtype LL3.3. Specimens: 20.1 g including one polished thin section at UWB; remainder with Mr. J. Grønne. | ||||||||||||||||||||||||||||||||
Data from: MB110 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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Geography:![]() |
Statistics: This is 1 of 1073 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters) |