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Northwest Africa 11000
Basic information Name: Northwest Africa 11000
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11000
Observed fall: No
Year found: 2015
Country: Morocco
Mass:help 603 g
Meteoritical Bulletin:  MB 105  (2016)  H4
Recommended:  H4    [explanation]

This is 1 of 6493 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 3 Dec 2016
Writeup from MB 105:

Northwest Africa 11000 (NWA 11000)


Purchased: 2015 April

Classification: Ordinary chondrite (H4)

History: Specimen was purchased in April 2015 in Morocco by S. Tutorow, who holds the main mass.

Physical characteristics: The type specimen is brown in color with an uneven surface and no evident fusion crust. Observation of the slab show a high abundance of metal grains, with the largest grain measuring ~1 cm in length. An igneous clast is present in the thin section.

Petrography: (E. Ferguson, UWO) The largest chondrule size is ~2 mm in diameter, and smallest chondrule size <0.1 mm ranging from well delineated rounded and sub-rounded chondrules to irregular or sub-angular in shape. Porphyritic olivine pyroxene (POP) chondrules dominate. Radial pyroxenes and small (<0.5mm) barred olivine (BO) chondrules were also found. Chondrules vary in size from <0.1mm to ~0.5mm. The specimen contains abundant metal grains with a modal abundance of ~10 vol%. Iron-nickel oxides are abundant and make up a network of irregularly shaped grains. Fe-Ni oxidation is evident around the edges of these grains and throughout the sample, however there is little evidence of silicate weathering. Secondary feldspar grains are <20 μm in size.

Geochemistry: (EMPA) Olivine Fa18.6±0.9 (n=10), low-Ca pyroxene Fs14.0±4.1Wo0.8±0.4 (n=10), high-Ca pyroxene Fs8.4±1.8Wo34.0±5.1 (n=5).

Specimens: 33.0 g type specimen, including polished mount and thin section at UWO. The remaining mass is with S. Tutorow.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2015 April
Mass (g):602.9
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):18.6±0.9 (n=10)
Ferrosilite (mol%):14.0±4.1 (n=10)
Wollastonite (mol%):0.8±0.4 (n=10)
Classifier:E. Ferguson, UWO
Type spec mass (g):33.0
Type spec location:UWO
Main mass:S. Tutorow
Comments:Field name G669.; submitted by A. Bouvier
   and collections
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. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Mike Markowitz   
Ryan Upchurch   


     This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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