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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
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 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 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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