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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
Classification
  history:
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
Writeuphelp
Writeup from MB 110:

Northwest Africa 14505 (NWA 14505)

Morocco

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:
  MB110
  Table 0
  Line 0:
Place of purchase:Denver, USA
Date:P 2005
Mass (g):24400
Pieces:1
Class:CV3
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
Institutions
   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)
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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