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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
Meteoritical Bulletin:  MB 111  (2023)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 341 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 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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