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Northwest Africa 15322
Basic information Name: Northwest Africa 15322
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15322
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 5.75 kg
Meteoritical Bulletin:  MB 111  (2023)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 287 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 1 Oct 2022
Writeup from MB 111:

Northwest Africa 15322 (NWA 15322)

(Northwest Africa)

Purchased: 2021

Classification: HED achondrite (Eucrite, monomict)

History: Purchased from Adrar Algeria in 2021 by Edwin Thompson; subsequently acquired by Paul Stahura.

Physical characteristics: One stone with dark-brown fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample is a breccia predominantly comprised of mm-sized, sub-angular basaltic clasts (most containing exsolved augite) and mineral fragments set within a dark, fine-grained matrix of the same composition containing accessory Cr-spinel, ilmenite, and SiO2-rich glass.

Geochemistry: Low-Ca Pyroxene (Fs63.0±1.2Wo2.6±0.6, range Fs60.4-65.2Wo2.0-4.6, Fe/Mn=31±1, n=23), Augite (Fs28.6±0.6Wo42.1±0.3, range Fs27.4-29.3Wo41.5-42.9, Fe/Mn=30±2, n=19), Calcic Plagioclase (An89.2±1.0, range An86.8-91.2, n=21).

Classification: Achondrite (eucrite, monomict breccia).

Specimens: 35.7 g at Cascadia, main mass with Paul Stahura.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021
Mass (g):5750
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):63.0±1.2, 28.6±0.6
Wollastonite (mol%):2.6±0.6, 42.1±0.3
Classifier:D. Sheikh, Cascadia
Type spec mass (g):35.7
Type spec location:Cascadia
Main mass:Paul Stahura
Comments:CML 1532; 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)
Thompson: Edwin Thompson, 5150 Dawn St., Lake Oswego, OR 97035, United States (private address)
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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     This is 1 of 9790 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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