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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
Recommended:  Howardite    [explanation]

This is 1 of 453 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 Meteoritical Bulletin, no. 112, in preparation (2023)
Find references in NASA ADS:
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     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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