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Northwest Africa 14509
Basic information Name: Northwest Africa 14509
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14509
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 508 g
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 14509 (NWA 14509)

Morocco

Purchased: 2012

Classification: Carbonaceous chondrite (CV3)

History: Sample was purchased from A. Aaronson in Tucson in 2012 who acquired it from Morocco. Sample is catalogued at the Royal Ontario Museum as M58160

Physical characteristics: Fist-sized blocky stone displaying fusion crust on two major faces and broken surfaces on 60% rest of dark brown exterior. All surfaces show moderate to mature desert polish. Chondrules and CAIs up to 1 cm size are readily visible in both fusion crust and broken surfaces.

Petrography: Cut faces show abundant, readily delineated chondrules and CAIs contained in a dark mesostasis. All chondrules and CAIs have dark fine grained rims 8 to 20 µm thick. In petrographic thin section, intact chondrule diameters average 839±384 µm (n=22). Chondrules and chondrule fragments are 40 vol%; irregular or ovoid CAIs are about 5 vol% and AOAs are 10 vol%. Minor metal is present as inclusions in chondrules. Sulfide occurs mostly decorating rims of chondrules and as abundant rounded inclusions in many olivine grains. Olivine shows mostly sharp to some undulatory extinction. One large composite chondrule-like object (diameter 1.7 mm) appears to have a CAI core with extensively intergrown acicular feldspar laths (up to 450 µm length), surrounded by a 300 µm rim of chondrules, subrounded olivine and pyroxene grains within a dark fine grained matrix. In BSE images, chondrule olivine is in some cases strongly zoned.

Geochemistry: EPMA: Olivine: 18.22±21.54 (n=28). Ca-poor pyroxene: Fs1.00±0.27 En97.51±1.28 Wo1.49±1.38 (n=14). Ca-rich pyroxene: Fs2.68±3.74 En53.29±13.86 Wo44.03±13.39 (n=14). Magnetite compositions: Cr2O3=0.22±0.45, TiO2=0.01±0.02, NiO=0.04±0.04, Al2O3=0.12±0.29 (n=21)

Classification: CV3 (S1) W2: Chondrule size, type, abundance, and magnetite compositions indicate that this meteorite is a CV3.

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

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Tucson, USA
Date:P 2012
Mass (g):507.91
Pieces:1
Class:CV3
Shock stage:S1
Weathering grade:moderate
Fayalite (mol%):18.22±21.54
Ferrosilite (mol%):1.00±0.27
Wollastonite (mol%):1.49±1.38
Classifier:P.McCausland, V. Di Cecco, ROM
Type spec mass (g):29.7
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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