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Northwest Africa 14710
Basic information Name: Northwest Africa 14710
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14710
Observed fall: No
Year found: 2017
Country: Morocco
Mass:help 126 g
Recommended:  LL3    [explanation]

This is 1 of 431 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 17 Apr 2022
Writeup from MB 111:

Northwest Africa 14710 (NWA 14710)


Purchased: 2017

Classification: Ordinary chondrite (LL3)

History: Sample was purchased at Tucson Mineral show in 2017 from Said Haddany, who acquired it from Morocco. Sample is catalogued at ROM as M59719.

Physical characteristics: Rounded, smooth individual with a mature desert polish, lacking fusion crust. Weathered surfaces show abundant chondrules and chondrule sockets. Physical properties: Magnetic susceptibilty of a 99.79 g specimen is log χ (× 10-9 m3/kg) = 3.10.

Petrography: Cut faces (8 cm2) show well-delineated chondrules with fine grained rims. Very little metal present. In polished thin section, a dark matrix (25 vol%) contains abundant chondrules and chondrule fragments. Chondrules are mostly of POP, PO, BO and RP types, and have fine grained rims. Chondrule mesostasis is typically microcrystalline and dark. Olivine shows mostly sharp extinction with few grains showing undulatory extinction. In BSE images, chondrule olivine and pyroxene grains are typically zoned. Metal grains typically occur as sparse <10 µm inclusions in porphyritic chondrules, and as rare aggregates in the matrix.

Geochemistry: EPMA: olivine Fa24.96±17.16 (n=27); Ca-poor pyroxene Fs11.97±8.74, Wo0.68±0.46 (n=20); Ca-rich pyroxene Fs10.97±6.46, Wo35.86±11.42 (n=13). Cr2O3 wt% in ferroan olivine is 0.09±0.06 (n=25).

Classification: Ordinary chondrite: LL3 (S1) W1. Low metal content and magnetic susceptibility indicates LL chondrite. Large variation in olivine and Ca-poor pyroxene compositions, low Cr2O3 wt% in ferroan olivine and presence of microcrystalline chondrule mesostasis suggest a subtype LL3.3.

Specimens: Type specimen ROM; main mass Gregory

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson, USA
Date:P 2017
Mass (g):126.01
Shock stage:S1
Weathering grade:W2
Fayalite (mol%):24.96±17.16
Ferrosilite (mol%):11.97±8.74, 10.97±6.46
Wollastonite (mol%):0.68±0.46, 35.86±11.42
Magnetic suscept.:3.10
Classifier:P. McCausland (ROM, UWO), V DiCecco (ROM)
Type spec mass (g):27.98
Type spec location:ROM
Main mass:Gregory
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)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 1902 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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