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Northwest Africa 15248
Basic information Name: Northwest Africa 15248
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15248
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 58.3 g
Recommended:  L6    [explanation]

This is 1 of 12583 approved meteorites (plus 8 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 5 Sep 2022
Writeup from MB 111:

Northwest Africa 15248 (NWA 15248)

(Northwest Africa)

Purchased: 2015

Classification: Ordinary chondrite (L6)

History: A 22.3g endcut was sent to Cascadia by John Shea, who purchased the meteorite in 2015 from Eegooblago Meteorites, who acquired it the same year from a Moroccan merchant.

Petrography: (M. Hutson, A. Ruzicka, Cascadia): Three large chondrules (all between 1 and 2 mm across) are readily discernable in thin section; other smaller chondrules are barely discernable from coarse matrix. Plagioclase feldspar grains are coarse (many > 50 µm across). A large (~0.7 × 1.2 mm) opaque region is comprised of feldspar intergrown with numerous small chromite-rich spinel grains, forming a feldspathic chromite assemblage (FCA).

Geochemistry: Olivine: Fa25.5±0.3, N=22; low-Ca pyroxene: Fs21.2±0.2Wo1.4±0.2, N=16. Plagioclase feldspar: Ab81.6±0.9Or7.1±0.8An11.3±0.8, N=12. FCA: Feldspar ranges in composition from Ab58.9Or2.0 near the center of the object to Ab84.1Or4.5 at the edge; spinel: Mg# ranges from 23.9 to 30.5; Cr# ranges from 56.2 to 71.9; grains contain between 1.78-3.45 wt% TiO2.

Classification: Ordinary chondrite (L6) based on mineral chemistry and texture.

Specimens: Cascadia holds 21.5 g in one piece, as well as a polished thin section and material in an epoxy butt; JShea holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:online
Date:P 2015
Mass (g):58.3
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):25.5±0.3 (N=22)
Ferrosilite (mol%):21.2±0.2 (N=16)
Wollastonite (mol%):1.4±0.2 (N=16)
Classifier:M. Hutson and A. Ruzicka, Cascadia
Type spec mass (g):22.3
Type spec location:Cascadia
Main mass:JShea (John A. Shea, Wallingford PA, https://bigjohnmeteorites.com/)
Comments:Lab number CML 1341; submitted by Melinda Hutson
   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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