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Northwest Africa 14842
Basic information Name: Northwest Africa 14842
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14842
Observed fall: No
Year found: 2015
Country: Morocco
Mass:help 380 g
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 8 May 2022
Writeup from MB 111:

Northwest Africa 14842 (NWA 14842)


Purchased: 2015

Classification: Ordinary chondrite (L5)

History: Sample was purchased in 2015 from A. Aaronson at the Tucson mineral show who acquired it from Morocco. Sample is catalogued at the ROM as M60273.

Physical characteristics: Rounded, blocky, fist-sized individual with concave surfaces, showing remnant dark fusion crust on nearly all surfaces. Broken and fusion crust surfaces have mature desert polish. Physical properties: Magnetic susceptibility measured for the 30.35 g type specimen is log χ (× 10-9 m3/kg) = 4.18.

Petrography: Cut faces show disseminated metal in blebs up to mm size, with cm2 areas where metal appears absent due to weathering. Chondrules are present but difficult to delineate in an patchy brown- to orange-weathered matrix. In polished thin section, chondrules are difficult to delineate and matrix is recrystallized to moderate grain size. Silicates are pervasively stained to tan colors with weathering. Olivine and pyroxene grains typically show undulatory extinction. In reflected light, metal grains are sparse and typically surrounded by Fe oxide haloes. Sulfide grains are abundant (2 vol%) and typically anhedral, up to 200 ┬Ám size. Fe oxides commonly fill pockets that appear to have replaced metal and otherwise occur filling cracks.

Classification: Ordinary chondrite: L5 (S2) W3. Magnetic susceptibilityis consistent with weathered L chondrite.

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

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson, AZ, USA
Date:P 2015
Mass (g):380
Shock stage:S2
Weathering grade:W3
Magnetic suscept.:4.18
Classifier:P. McCausland, ROM, UWO
Type spec mass (g):30.35
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)
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 Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 1903 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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