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Northwest Africa 15375
Basic information Name: Northwest Africa 15375
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15375
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1670 g
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 329 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 12 Nov 2022
Writeup from MB 111:

Northwest Africa 15375 (NWA 15375)

(Northwest Africa)

Purchased: 2021

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Mark Lyon from a meteorite dealer in Algeria in 2021.

Physical characteristics: Single stone with minor fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample is brecciated and comprised of mm to cm-sized lithic and monomineralic clasts set within a dark, finer-grained fragmental matrix. Lithic clast lithologies identified include: anorthosites, olivine gabbros, harzburgites, noritic anorthosites, and impact-melt-rich clasts. Accessory phases include ilmenite and chromite (some Ti-bearing).

Geochemistry: Olivine (Fa38.0±6.5, range Fa29.8-43.5, Fe/Mn=90±7, n=8), Low-Ca Pyroxene (Fs32.9±18.4Wo3.8±0.7, range Fs16.3-53.5Wo2.7-4.6, Fe/Mn=58±4, n=5), Pigeonite (Fs38.1±15.2Wo8.6±3.2, range Fs19.8-83.4Wo5.2-15.8, Fe/Mn=53±5, n=12), High-Ca Pyroxene (Fs23.3±7.7Wo38.4±2.1, range Fs17.5-43.7Wo34.8-41.8, Fe/Mn=53±9, n=10), Calcic Plagioclase (An96.0±1.5, range An92.8-99.2, n=25).

Classification: Lunar (feldspathic fragmental breccia).

Specimens: 20.2 g at Cascadia, main mass with Mark Lyon.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021
Mass (g):1670
Class:Lunar (feldsp. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):38.0±6.5
Ferrosilite (mol%):32.9±18.4, 38.1±15.2, 23.3±7.7
Wollastonite (mol%):3.8±0.7, 8.6±3.2, 38.4±2.1
Classifier:D. Sheikh, Cascadia
Type spec mass (g):20.2
Type spec location:Cascadia
Main mass:Mark Lyon
Comments:CML 1571; 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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