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Northwest Africa 14505
Basic information Name: Northwest Africa 14505
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14505
Observed fall: No
Year found: 2005
Country: Morocco
Mass:help 24.4 kg
Recommended:  CV3    [explanation]

This is 1 of 593 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 15 Dec 2021
Writeup from MB 110:

Northwest Africa 14505 (NWA 14505)


Purchased: 2005

Classification: Carbonaceous chondrite (CV3)

History: Sample was purchased from A. Aaronson at the Denver Show in 2005who acquired it from Morocco. Sample is catalogued at the Royal Ontario Museum as M59753

Physical characteristics: Large single specimen displaying moderate desert polish modification to fusion crust (2/3 of its surface) and weathered broken surfaces. Chondrules and CAIs readily visible. Several subparallel weathered 1 mm fractures pass through the meteorite.

Petrography: Cut endpiece surfaces and a thin section show abundant, well defined chondrules (40 vol%) with average diameter 0.72 mm (n = 28), set in a dark-gray matrix (55 vol%) which also contains CAIs (<5 vol%) and 5 vol% AOAs. Porphyritic (PO, POP) chondrules are most common. Olivine in chondrules exhibits sharp extinction. In BSE images, olivine commonly shows Fe-Mg zoning. Metal is absent, and magnetite occurs as subhedral inclusions in chondrules and as rounded clusters (up to 30 micrometres) of finer grains in the matrix.

Geochemistry: EPMA: Olivine: Fa25.04±18.14 (n=30), with chondrule olivine: Fa8.20±10.90 (n=11); Ca-poor pyroxene: Fs1.60±0.95 En97.55±0.89 Wo0.85±0.21 (n=17); Ca-rich pyroxene: Fs0.94±0.37En58.08±4.26Wo40.98±4.32 (n=12). Magnetite compositions (wt%): Cr2O3=1.33±0.33, TiO2=0.03±0.01, NiO=0.07±0.04, Al2O3=1.06±0.27 (n=22)

Classification: CV3 (S1) Moderately Weathered: Chondrule size, abundance,chondrule olivine compositions with Fa<15, and magnetite compositions indicate that this meteorite is a CV3 and not CK.

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

Data from:
  Table 0
  Line 0:
Place of purchase:Denver, USA
Date:P 2005
Mass (g):24400
Shock stage:S1
Weathering grade:Moderate
Fayalite (mol%):25.04±18.14
Ferrosilite (mol%):1.60±0.95
Wollastonite (mol%):0.85±0.21
Classifier:P.McCausland, V. Di Cecco, ROM
Type spec mass (g):27.55
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)
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. 110, in preparation (2021)
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     This is 1 of 1894 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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