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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
Recommended:  Lunar (melt breccia)    [explanation]

This is 1 of 24 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 Meteoritical Bulletin, no. 111, in preparation (2022)
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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