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Northwest Africa 10998
Basic information Name: Northwest Africa 10998
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10998
Observed fall: No
Year found: 2015
Country: Morocco
Mass:help 428 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  L5
Recommended:  L5    [explanation]

This is 1 of 7227 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 3 Dec 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10998 (NWA 10998)

Morocco

Purchased: 2015 April

Classification: Ordinary chondrite (L5)

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

Physical characteristics: Physical Characteristics: The repository stone has no fusion crust and is light brown to beige.

Petrography: (R. E. Sukara, UWO). Chondrules do not have clear boundary. There are a few sparse grains of residual metal (less than 1% by count) in a fine grained recrystallized matrix with oxidized dark areas. Veins are filled with iron oxides. The mineralogy is dominated by olivine and pyroxene crystals that exhibit undulatory extinction, and small plagioclase crystals. Chondrules (BO) have a mean size of 0.7 mm.

Geochemistry: (EMPA) Olivine (Fa24.8±1.0, N=12) low-Ca pyroxene (Fs20.8±0.1Wo1.4±0.3, N=11), and plagioclase An10.6±1.2Ab=83.4±1.2Or=5.9±0.9 (N=6).

Specimens: 26.5 g including a polished mount and a thin section on deposit at UWO. The remaining mass is with S. Tutorow.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2015 April
Mass (g):428
Pieces:many
Class:L5
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):24.8±1.0 (N=12)
Ferrosilite (mol%):20.8±0.1 (N=10)
Wollastonite (mol%):1.4±0.3 (N=11)
Classifier:R. E. Sukara, UWO
Type spec mass (g):26.5
Type spec location:UWO
Main mass:S. Tutorow
Comments:Field name is G667.; submitted by A. Bouvier
Institutions
   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)
Catalogs:
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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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1680 approved meteorites from Morocco (plus 25 unapproved names) (plus 1 impact crater)

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