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Northwest Africa 14568
Basic information Name: Northwest Africa 14568
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14568
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 46.9 g
Recommended:  L3    [explanation]

This is 1 of 811 approved meteorites (plus 1 unapproved name) classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 26 Dec 2021
Writeup from MB 110:

Northwest Africa 14568 (NWA 14568)


Purchased: 2012

Classification: Ordinary chondrite (L3)

History: Sample was purchased in 2012 from Adam Aaronson at the Tucson mineral show who acquired it from Morocco. Sample is catalogued at ROM as M58504.

Physical characteristics: Single individual with nearly complete fusion crust and minor broken surfaces; desert polish poorly developed.

Petrography: Interior cut faces and a petrographic thin section reveals abundant chondrules up to 2 mm diameter and chondrule fragments set in a dark matrix which has little or no recrystallization. Chondrules and fragments typically have opaque fine grained rims. Olivine shows planar fractures and undulatory to mosaic extinction. Metal and sulfide occur disseminated in matrix and especially on chondrule rims as sub-mm grains, as well as within many chondriles as droplet unclusions of metal and sulfide. In BSE images, olivine is commonly zoned with Fe-rich rims.

Geochemistry: EPMA: Olivine Fa23.67±16.50, range Fa0.96 - Fa67.37 (n=31); Ca-poor pyroxene Fs12.92±8.42Wo1.77±1.94 (n=21); Ca-rich pyroxene Wo28.26±11.40Fs11.11±6.18 (n=8).

Classification: Ordinary chondrite: L3 (S3) W1. Suggest petrographic subtype 3.3 based on lack of matrix recrystallization, presence of chondrule mesostasis glass and large range of silicate compositions as observed in PMD.

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

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson, AZ, USA
Date:P 2012
Mass (g):46.92
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):23.67±16.50 (n=31)
Ferrosilite (mol%):12.92±8.42 (n=21)
Wollastonite (mol%):1.77±1.94
Classifier:P. McCausland, ROM, UWO
Type spec mass (g):11.16
Type spec location:ROM
Main mass:Dgregory
Comments:M58504; 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 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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     This is 1 of 1974 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater)

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