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Northwest Africa 15356
Basic information Name: Northwest Africa 15356
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15356
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 260 g
Meteoritical Bulletin:  MB 111  (2023)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 606 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 22 Oct 2022
Writeup from MB 111:

Northwest Africa 15356 (NWA 15356)

(Northwest Africa)

Purchased: 2021

Classification: HED achondrite (Eucrite)

History: Purchased from Craig Zlimen in 2021 from an Algerian meteorite dealer.

Physical characteristics: Single stone with dark brown fusion crust.

Petrography: (D. Sheikh, Cascadia) Specimen displays a brecciated texture and is comprised primarily of mm-sized lithic fragments and isolated sub-angular elongate/equant plagioclase and clinopyroxene grains (Av. ~0.3 mm, up to ~0.5 mm) set within a finer-grained groundmass rich in pigeonite. Accessory phases include Cr-spinel, ilmenite, SiO2-rich glass, and troilite.

Geochemistry: Pigeonite (Fs49.9±4.0Wo12.6±3.3, range Fs45.7-64.1Wo6.1-24.5, Fe/Mn=29±2, n=30), High-Ca Pyroxene (Fs47.3±31.9Wo34.8±11.6, range Fs24.7-69.9Wo26.6-43.1, Fe/Mn=34±4, n=2), Calcic Plagioclase (An90.6±0.5, range An89.0-91.3, n=20).

Classification: HED Achondrite (Eucrite).

Specimens: 20.65 grams at Cascadia, main mass with Craig Zlimen.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021
Mass (g):260
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):49.9±4.0, 47.3±31.9
Wollastonite (mol%):12.6±3.3, 34.8±11.6
Classifier:D. Sheikh, Cascadia
Type spec mass (g):20.65
Type spec location:Cascadia
Main mass:Craig Zlimen
Comments:CML 1529; 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., 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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