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Northwest Africa 14709
Basic information Name: Northwest Africa 14709
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14709
Observed fall: No
Year found: 2005
Country: Morocco
Mass:help 753 g
Classification
  history:
Recommended:  L5    [explanation]

This is 1 of 8487 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 26 Mar 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14709 (NWA 14709)

Morocco

Purchased: 2005

Classification: Ordinary chondrite (L5)

History: Sample was purchased at the Denver mineral show in 2005 from A. Aaronson, who acquired it from Morocco. Sample is catalogued at ROM as M59826.

Physical characteristics: Fist-sized individual nearly completely covered in fusion crust, with dun-brown weathering on most surfaces, suggesting that stone was 90% buried at find location. Moderate desert polished developed on exposed fusion crust surface. Physical properties: Magnetic susceptibilty of the 32.68 g type specimen is log χ (× 10-9 m3/kg) = 4.16.

Petrography: Cut faces totalling 20 cm2 show a mottled, orange-weathered interior with sub-mm metal grains and aggregated metal clusters distributed along planes spaced at 1 to 3 cm. No chondrules are discernable. In polished thin section, silicates are pervasively Fe-stained. Chondrules are poorly delineated in a recraystallized matrix. Olivine and pyroxene show undulating to mosaic extinction and pervasive planar fracturing. In reflected light, metal and sulfide grains are subrounded and typically show embayment textures on surrounding chondritic silicates. Metal and sulfide is variably to strongly altered by Fe-oxides, which form haloes an in some cases completely replace metal and sulfide grains, with associated local vein networks of Fe oxides extending into surrounding silicates.

Classification: Ordinary chondrite: L5 (S4) W3. Low magnetic susceptibility for L chondrite reflects extensive weathering replacement of Fe metal with Fe oxides.

Specimens: Type specimen ROM; main mass DGregory

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Denver, USA
Date:P 2005
Mass (g):753.1
Pieces:1
Class:L5
Shock stage:S4
Weathering grade:W3
Magnetic suscept.:4.16
Classifier:P. McCausland (ROM, UWO), V Di Cecco (ROM)
Type spec mass (g):32.68
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)
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1902 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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