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Northwest Africa 14627
Basic information Name: Northwest Africa 14627
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14627
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 151.9 g
Recommended:  H4    [explanation]

This is 1 of 6388 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 19 Mar 2022
Writeup from MB 111:

Northwest Africa 14627 (NWA 14627)


Purchased: 2012

Classification: Ordinary chondrite (H4)

History: Sample was purchased at the Tucson mineral show in 2012 from A. Aaronson, who acquired it from Morocco. Sample is catalogued at the ROM as M58146.

Physical characteristics: Flat, lenslike individual with 50% rounded fusion crust surface and 50% broken surface with mature desert polish. The two surfaces meet with a sharp angular boundary around the stone, with broken surfaces showing well-defined chondules in an unweathered grey matrix. Magnetic susceptibility measured for a 6.9 g slab is log χ (× 10-9 m3/kg) = 5.19.

Petrography: A 10 cm2 cut surface shows a dark grey interior bearing abundant metal and sulfide clustered into strings and elongate blebs >1 mm, which collectively define a flattening foliation in the stone that is subparallel to the stone’s lenslike shape. Chondrules and some sub-mm vugs are also present. In polished thin section, the matrix is dark, bearing small POP, RP and CC chondrules and chondrule fragments. A few chondrules are as large as 900 µm. Chondrule mesostasis appears to be microcrystalline. Many chondrules have dark, fine-grained rims. Olivine and pyroxene grains exhibit undulatory to mosaic extinction with some planar fractures. In reflected light, larger sulfide grains appear spongy and fine trails of tiny sulfide grains decorate fractures in matrix silicate grains.

Classification: Ordinary chondrite: H4 (S4) W1. Petrographic observations and magnetic susceptibility indicate this meteorite is an H4 chondrite. Metal and sulfide foliation in the bulk stone and petrographic observation of olivine, pyroxene textures and sulfide mobility in fractures indicate a high shock level.

Specimens: Type specimen ROM; main mass Gregory

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson, USA
Date:P 2012
Mass (g):151.92
Shock stage:S4
Weathering grade:W1
Magnetic suscept.:5.19
Classifier:P. McCausland (ROM, UWO), V Di Cecco (ROM)
Type spec mass (g):20
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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