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Northwest Africa 15323
Basic information Name: Northwest Africa 15323
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15323
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 3.6 kg
Meteoritical Bulletin:  MB 111  (2023)  Eucrite-br
Recommended:  Eucrite-br    [explanation]

This is 1 of 226 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 1 Oct 2022
Writeup from MB 111:

Northwest Africa 15323 (NWA 15323)

(Northwest Africa)

Purchased: 2021

Classification: HED achondrite (Eucrite, brecciated)

History: Purchased from Mauritania in 2021 by Edwin Thompson; subsequently acquired by Howard Stroupe.

Physical characteristics: Many stones without observable fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample is a breccia predominantly comprised of mm-sized, sub-rounded to sub-angular cumulate and basaltic clasts and set within a fine-grained matrix containing accessory ilmenite and SiO2-rich glass.

Geochemistry: Low-Ca Pyroxene (Fs60.0±0.8Wo4.2±0.9, range Fs58.6-61.8Wo2.4-5.7, Fe/Mn=32±1, n=19), Pigeonite (Fs47.7±3.9Wo19.6±4.5, range Fs43.1-56.5Wo8.9-24.9, Fe/Mn=31±1, n=11), High-Ca Pyroxene (Fs35.5±7.1Wo33.5±7.9, range Fs27.8-43.3Wo25.1-41.9, Fe/Mn=32±2, n=7), Calcic Plagioclase (An86.3±3.5, range An79.1-90.7, n=24).

Classification: Achondrite (eucrite, brecciated).

Specimens: 57 g at Cascadia, main mass with Howard Stroupe.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2021
Mass (g):3600
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):60.0±0.8, 47.7±3.9, 35.5±7.1
Wollastonite (mol%):4.2±0.9, 19.6±4.5, 33.5±7.9
Classifier:D. Sheikh, Cascadia
Type spec mass (g):57
Type spec location:Cascadia
Main mass:Howard Stroupe
Comments:CML 1588; 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 9570 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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