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Northwest Africa 14517
Basic information Name: Northwest Africa 14517
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14517
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 735 g
Classification
  history:
Recommended:  L3-6    [explanation]

This is 1 of 61 approved meteorites classified as L3-6.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 11 Dec 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14517 (NWA 14517)

Morocco

Purchased: 2012

Classification: Ordinary chondrite (L3-6)

History: Sample was purchased in 2012 from Adam Aaronson at the Tucson mineral show who acquired it from Morocco. Sample is catalogued at the Royal Ontario Museum as M58210.

Physical characteristics: Fist-sized individual with well-developed desert polish and pitted surfaces. Fusion crust covers a third of the surface.

Petrography: Cut faces on slabs totalling 45 cm2 reveal a dark grey chondrule-bearing rock with sub-mm metal grains and associated rust spots throughout stone. Notably, some cm-size subrounded light-color clasts are present, bearing larger metal grains and few distinct chondrules. Clasts appear to be of L5 and L6 chondrite. In thin section, chondrule fragments, some intact chondrules of up to 800 µm diameter, angular lithic clasts and individual euhedral olivine and pyroxene grains sit within a crystalline groundmass. All clastic components have a dark fine grained rim of matrix material. L5 clasts and a type 6 metal-free clast show undulatory extinction to strong mosaicism in olivine and pyroxene. Groundmass olivine shows undulatory extinction. BSE images show minor presence of more Mg-rich olivine and pyroxene in some cryptocrystalline chondrules. Accessory minerals are troilite grains mostly in the groundmass and interstitial apatite in clasts.

Geochemistry: EPMA: Olivine Fa23.85±2.96 (n=30); Ca-poor pyroxene Fs17.65±5.49 and Wo1.38±2.53 (n=23); Ca-rich pyroxene Wo33.26±12.50 and Fs12.82±4.55 (n=7). L5, L6 clasts only: Fa24.51±0.59 (n=5). Cryptocrystalline chondrules: Fs10.85-15.38 (n=3) and 2.18-2.32 (n=2)

Classification: Ordinary chondrite breccia: L3-6 breccia (S3) W2. Local presence of compositionally low Fe chondrule olivine and pyroxene suggests that the breccia as a whole is L3, but bulk of the volume is of L5 and L6 clasts.

Specimens: Type specimen location: ROM. Main mass: D. Gregory.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Tucson, AZ, USA
Date:P 2012
Mass (g):735.40
Pieces:1
Class:L3-6
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):23.85±2.96
Ferrosilite (mol%):17.65±5.49
Wollastonite (mol%):1.38±2.53
Classifier:P. McCausland, ROM, UWO
Type spec mass (g):21.74
Type spec location:ROM
Main mass:DGregory
Comments:M58210; submitted by V. Di Cecco, ROM
Institutions
   and collections
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011)
UWO: University of Western Ontario, Department of Earth Sciences, BGS 1026, 1151 Richmond St. N, London, Ontario, Canada N6A 5B7, Canada (institutional address; updated 18 Jul 2015)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address)
Catalogs:
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1903 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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