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Northwest Africa 16133
Basic information Name: Northwest Africa 16133
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16133
Observed fall: No
Year found: 2023
Country: (Northwest Africa)
Mass:help 3.05 kg
Meteoritical Bulletin:  MB 112  (2024)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 452 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 29 Sep 2023
Writeup from MB 112:

Northwest Africa 16133 (NWA 16133)

(Northwest Africa)

Purchased: 2023

Classification: HED achondrite (Howardite)

History: Purchased in 2023 by Shaun and David Fletcher from a meteorite dealer in 2023.

Physical characteristics: Many heavily weathered stones covered in desert patina.

Petrography: (D. Sheikh, Cascadia) Sample is a polymict breccia comprised of sub-angular to sub-rounded mm-sized lithic and mineral clasts (largest clast ~8 mm; eucritic material [basaltic+cumulate] comprise ~ 55 vol. % of clasts, diogenitic material comprise ~ 45 vol. % of clasts) set within a fine-grained fragmental matrix. Accessory phases identified include SiO2-rich glass, ilmenite, and chromite.

Geochemistry: Eucrite Clasts: [Olivine (Fa53.2±19.1, range Fa39.6-66.7, Fe/Mn = 49±5, n=2), Low-Ca Pyroxene (Fs50.7±11.5Wo3.3±1.3, range Fs35.0-68.5Wo1.3-5.9, Fe/Mn = 30±2, n=29), Pigeonite (Fs47.1±5.5Wo10.8±4.5, range Fs39.1-57.7Wo6.4-21.7, Fe/Mn=29±1, n=13), High-Ca Pyroxene (Fs30.1±6.7Wo39.0±4.7, range Fs17.4-43.9Wo26.4-43.7, Fe/Mn=30±3, n=17), Calcic Plagioclase (An90.3±2.4, range An84.0-92.8, n=11)]; Diogenite Clasts: [Olivine (Fa29.0, Fe/Mn =48, n=1), Low-Ca Pyroxene (Fs25.1±5.8Wo2.2±0.9, range Fs18.3-34.0Wo1.2-4.1, Fe/Mn = 28±2, n=13)].

Classification: HED Achondrite (Howardite).

Specimens: 20.4 g at Cascadia, main mass with David and Shaun Fletcher.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2023
Mass (g):3051
Shock stage:moderate
Weathering grade:high
Fayalite (mol%):53.2±19.1, 29.0
Ferrosilite (mol%):50.7±11.5, 47.1±5.5, 30.1±6.7, 25.1±5.8
Wollastonite (mol%):3.3±1.3, 10.8±4.5, 39.0±4.7, 2.2±0.9
Classifier:D. Sheikh, Cascadia
Type spec mass (g):20.4
Type spec location:Cascadia
Main mass:David and Shaun Fletcher
Comments:CML 1634; submitted by Daniel Sheikh
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?
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     This is 1 of 9790 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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