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Northwest Africa 15374
Basic information Name: Northwest Africa 15374
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15374
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 1300 g
Meteoritical Bulletin:  MB 111  (2023)  Lunar (melt breccia)
Recommended:  Lunar (melt breccia)    [explanation]

This is 1 of 28 approved meteorites classified as Lunar (melt breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 4 Dec 2022
Writeup from MB 111:

Northwest Africa 15374 (NWA 15374)

(Northwest Africa)

Purchased: 2020

Classification: Lunar meteorite (melt breccia)

History: Purchased by Mark Lyon from a meteorite dealer in northwest Africa in 2020.

Physical characteristics: Single stone with minor fusion crust.

Petrography: (D. Sheikh, Cascadia) Specimen is a polymict breccia comprised of sub-angular to sub-rounded mm-sized lithic and monomineralic clasts (up to ~3 mm) set within a dark, melt-rich matrix. Lithic clast lithologies identified include: anorthosites, impact-melt-rich clasts, dunites, olivine gabbronorites, norites, and noritic anorthosites. Accessory mineral phases include ilmenite and chromite (some Ti-bearing).

Geochemistry: Olivine (Fa33.9±14.4, range Fa5.9-48.4, Fe/Mn=89±12, n=14), Low-Ca Pyroxene (Fs22.6±9.3Wo3.3±0.4, range Fs14.7-40.6Wo2.6-3.9, Fe/Mn=50±5, n=7), Pigeonite (Fs31.3±8.6Wo14.7±5.1, range Fs19.3-50.6Wo7.1-23.4, Fe/Mn=50±4, n=19), High-Ca Pyroxene (Fs25.6±9.2Wo33.0±6.2, range Fs13.3-37.3Wo26.7-41.7, Fe/Mn=47±12, n=5), Calcic Plagioclase (An96.4±0.6, range An95.4-97.8, n=24).

Classification: Lunar (melt breccia).

Specimens: 20.35 g at Cascadia, main mass with Mark Lyon.

Data from:
  Table 0
  Line 0:
Place of purchase:Northwest Africa
Date:P 2020
Mass (g):1300
Class:Lunar (melt breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):33.9±14.4
Ferrosilite (mol%):22.6±9.3, 31.3±8.6, 25.6±9.2
Wollastonite (mol%):3.3±0.4, 14.7±5.1, 33.0±6.2
Classifier:D. Sheikh, Cascadia
Type spec mass (g):20.35
Type spec location:Cascadia
Main mass:Mark Lyon
Comments:CML 1572; 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 9829 approved meteorites from (Northwest Africa) (plus 1851 unapproved names)

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