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Northwest Africa 15286
Basic information Name: Northwest Africa 15286
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15286
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 68 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 1 Oct 2022
Writeup from MB 111:

Northwest Africa 15286 (NWA 15286)

(Northwest Africa)

Purchased: 2021

Classification: Lunar meteorite (melt breccia)

History: Purchased by Craig Zlimen in 2021 from a meteorite dealer in Algeria.

Physical characteristics: Single stone with minor dark fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample is a polymict breccia consisting of a variety of mm-sized lithic clasts and sub-angular mineral fragments (e.g. exsolved pigeonite, forsteritic olivine, plagioclase) set within a partly vesicular, plagioclase-rich crystalline melt rock matrix. Lithic clast lithologies identified in the sample include: anorthosites, troctolites, olivine norites, anorthositic norites, basalts, and impact melt-rich clasts (Stoffler et al., 1980), indicative of this specimen sampling a mix of highland (FAN, Mg-Suite), mare, and PKT material. Accessory phases include ilmenite, Cr-spinel, SiO2-rich glass, pentlandite, and baddeleyite.

Geochemistry: Olivine (Fa25.4±13.9, range Fa6.9-47.2, Fe/Mn=86±10, n=8), Low-Ca Pyroxene (Fs22.4±11.3Wo4.3±0.5, range Fs12.2-37.0Wo3.7-4.7, Fe/Mn=46±4, n=4), Pigeonite (Fs31.1±13.2Wo14.8±4.9, range Fs17.3-57.9Wo7.7-22.4, Fe/Mn=49±7, n=10), Augite (Fs27.9±9.8Wo29.2±6.1, range Fs22.0-39.2Wo25.5-36.3, Fe/Mn=47±3, n=3), Calcic plagioclase (An94.0±5.4, range An76.9-98.7, n=26).

Classification: Lunar (polymict melt breccia).

Specimens: 13.66 g at Cascadia, main mass with Craig Zlimen.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021
Mass (g):68
Class:Lunar (melt breccia)
Shock stage:high
Weathering grade:low
Fayalite (mol%):25.4±13.9
Ferrosilite (mol%):22.4±11.3, 31.1±13.2, 27.9±9.8
Wollastonite (mol%):4.3±0.5, 14.8±4.9, 29.2±6.1
Classifier:D. Sheikh, Cascadia
Type spec mass (g):13.66
Type spec location:Cascadia
Main mass:Craig Zlimen
Comments:CML 1528; Zli-069; 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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