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Northwest Africa 11505
Basic information Name: Northwest Africa 11505
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11505
Observed fall: No
Year found: 2017
Country: Algeria
Mass:help 33.8 g
Meteoritical Bulletin:  MB 106  (2018)  CV3
Recommended:  CV3    [explanation]

This is 1 of 622 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 6 Dec 2017
Writeup from MB 106:

Northwest Africa 11505 (NWA 11505)


Purchased: 2017 Jun

Classification: Carbonaceous chondrite (CV3)

History: Purportedly found near the Algeria/Libya border and purchased by Darryl Pitt in June 2017 from a dealer in Mauritania.

Petrography: (A. Irving and S. Kuehner, UWS) Irregularly-shaped to rounded chondrules (mostly granular but some BO, some rimmed; apparent diameter 1.18±0.70 mm, N = 21) plus ovoid CAI (both fine grained and coarse grained, up to 5 mm across) occur in a fine grained, calcite-bearing matrix (~30 vol.%, red-brown in thin section). Grossmanite is present in one CAI.

Geochemistry: Olivine (Fa0.2-63.2, N = 3), orthopyroxene (Fs0.6-4.7Wo1.2-1.3, N = 2, diopside (Fs0.6Wo43.5), grossmanite (Fs2.4Wo66.5, Al2O3 = 21.3 wt.%, TiO2 = 10.2 wt.%).

Classification: Carbonaceous chondrite (CV3).

Specimens: 12.1 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2017 Jun
Mass (g):33.8
Shock stage:S2
Weathering grade:moderate
Fayalite (mol%):0.2-63.2
Ferrosilite (mol%):0.6-4.7
Wollastonite (mol%):1.2-1.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):12.1
Type spec location:UWB
Main mass:DPitt
Comments:Work name MVCH 306; submitted by A. Irving
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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     This is 1 of 1306 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)

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