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Northwest Africa 14711
Basic information Name: Northwest Africa 14711
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14711
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 6.11 kg
Recommended:  LL5    [explanation]

This is 1 of 3187 approved meteorites (plus 1 unapproved name) classified as LL5.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 21 Feb 2022
Writeup from MB 111:

Northwest Africa 14711 (NWA 14711)


Purchased: 2012

Classification: Ordinary chondrite (LL5)

History: Sample was purchased at the Tucson mineral show in 2012 from A. Aaronson, who acquired it from Morocco. Sample is catalogued at ROM as M59707.

Physical characteristics: Head-sized dun brown-weathered individual with 2/3 fusion crust featuring mature desert polish. Extent of dun weathering surface suggests that 60% of stone was below ground at find location. Physical properties: Magnetic susceptibilty of a 10.25 g specimen is log χ (× 10-9 m3/kg) = 3.81.

Petrography: Cut surfaces (40 cm2) show a pervaisively brown, mottled interior, with abundant well-spaced large chondrules and disseminated sub-mm metal grains. Metal has associated Fe oxide haloes. In thin section, Chondrules are well defined and typically have thin fine grained rims. Chondrules are mainly of POP, PO, RP, PP types with some BO and CC chondrules. Matrix is recrystallized, with secondary grains are as large as 50 µm and Fe-oxide staining is pervasive. Olivine and pyroxene typically show sharp to undulatory extinction.

Geochemistry: EPMA: olivine Fa27.60±0.39 (n = 24); Ca-poor pyroxene Fs23.05±0.17; Wo0.66±0.32 (n=4)

Classification: Ordinary chondrite: LL5 (S2) W2

Specimens: Type specimen ROM; main mass DGregory

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson, USA
Date:P 2012
Mass (g):6108.94
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):27.60±0.39
Ferrosilite (mol%):23.05±0.17
Wollastonite (mol%):0.66±0.32
Magnetic suscept.:3.81
Classifier:P. McCausland (ROM, UWO), S. Yokoyama (ROM), V DiCecco (ROM)
Type spec mass (g):20.32
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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