7.72g NWA 13674 - H7 Ordinary Chondrite Meteorite End Cut
|Northwest Africa 13674|
Name: Northwest Africa 13674
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13674
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 1730 g
This is 1 of 27 approved meteorites classified as H7. [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
|Comments:||Approved 8 Apr 2021|
Writeup from MB 110:
Northwest Africa 13674 (NWA 13674)
Classification: Ordinary chondrite (H7)
History: Purchased by Craig Zlimen in 2018 from a Moroccan dealer.
Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Triple grain junction texture among constituent phases is predominant, but there are also sparse pyroxene oikocrysts containing olivine chadacrysts. No remnant chondrules are present. Grain size is about 200 µm. Accessory phases include abundant altered kamacite, taenite, troilite, low-Ti chromite and merrillite. Secondary iron hydroxides are present on grain boundaries.
Geochemistry: Olivine (Fa18.6±0.1, range Fa18.5-18.7, N = 5), low-Ca pyroxene (Fs16.4±0.1Wo3.8±0.6, range Fs16.4-16.5Wo3.4-4.7, N = 4), augite (Fs7.6±0.6Wo42.6±1.1, range Fs7.1-8.2Wo43.5-41.4, N = 2), plagioclase (An9.9Or7.9; An25.3Or2.8; N = 2).
Classification: Ordinary chondrite (H7).
Specimens: 21.8 g including one polished thin section at UWB; remainder with Mr. C. Zlimen.
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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