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Northwest Africa 14619
Basic information Name: Northwest Africa 14619
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14619
Observed fall: No
Year found: 2008
Country: Morocco
Mass:help 29.3 g
Recommended:  L6    [explanation]

This is 1 of 12189 approved meteorites (plus 7 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 29 Jan 2022
Writeup from MB 111:

Northwest Africa 14619 (NWA 14619)


Purchased: 2008

Classification: Ordinary chondrite (L6)

History: Sample was purchased at the Tucson mineral show in 2008 from A. Aaronson, who acquired it from Morocco. Sample is catalogued at the Royal Ontario Museum as M58919.

Physical characteristics: Small, dark, fractured individual showing fusion crust on two thirds of surfaces. All surfaces including broken face have moderate desert polish.

Petrography: Cut faces show dark brown interior with minor presence of disseminated sub-mm metal grains and a network of grey fracture-fill veins. In thin section, the rock is very dark, showing an extensive Fe-oxide vein network. Chondrules are very poorly defined. No large grains are present and the dominant texture is one of fragmentation. Olivine exhibits undulatory to mosaic extinction, along with some internal planar fracturing. Silicates show strong Fe-staining. In reflected light, sulfide grains are abundant and some FeNi metal grains show alteration rims with Fe-oxides, that are associated with the Fe-oxide vein network.

Classification: Ordinary chondrite L6 (S3) W2. Lack of chondrule definition suggests type 6. Low metal content and prevalence of sulfides suggests L classification. Moderate shock S3 is indicated by olivine shock damage. Pervasive Fe-oxide veining and breakdown of metal and sulfides suggests weathering W2. Magnetic susceptibility of log χ (× 10-9 m3/kg) = 4.50 is consistent with L chondrite.

Specimens: Type specimen ROM; main mass DGregory

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson, USA
Date:P 2008
Mass (g):29.3
Shock stage:S3
Weathering grade:W2
Magnetic suscept.:4.50
Classifier:P. McCausland (ROM, UWO), V Di Cecco (ROM)
Type spec mass (g):6.72
Type spec location:ROM
Main mass:Dgregory
Comments:Submitted by V. Di Cecco, ROM
   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)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 1902 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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