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Northwest Africa 10267
Basic information Name: Northwest Africa 10267
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10267
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 250 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  LL4-7
Recommended:  LL4-7    [explanation]

This is 1 of 2 approved meteorites classified as LL4-7.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 1 Mar 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 10267 (NWA 10267)

(Northwest Africa)

Purchased: 2013 Sep

Classification: Ordinary chondrite (LL4-7)

History: Purchased by Aras Jonikas in February 2015 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Complex breccia composed of relatively large (up to 2.4 mm), well-formed chondrules, angular mineral fragments and a variety of lithic clasts set in a finer grained matrix containing altered metal. Some lithic clasts contain relict chondrules (LL6) whereas others are completely recystallized (LL7). Rare clast types include very dark, fine grained indeterminate lithologies, fragmental breccias, and an aggregate dominated by K-feldspar. Minerals are olivine (equilibrated), orthopyroxene (unequilibrated, except in type 6 and type 7 clasts), augite, sodic plagioclase, chromite, altered kamacite, taenite, calcite and barite. Some chondrules contain very calcic plagioclase (bytownite).

Geochemistry: Olivine (Fa29.0-29.5, N = 3), orthopyroxene (Fs5.4-22.8Wo0.4-3.5, N = 3), clinopyroxene (Fs9.5-9.8Wo44.5-43.3, N = 2).

Classification: Ordinary chondrite (LL4-7 breccia).

Specimens: 25 g including one 2" by 1.5" polished thin section at PSF. The main mass is held by Mr. A. Jonikas.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013 Sep
Mass (g):250
Pieces:1
Class:LL4-7
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):29.0-29.5
Ferrosilite (mol%):5.4-22.8
Wollastonite (mol%):0.4-3.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):25
Type spec location:PSF
Main mass:A. Jonikas
Comments:AJ15-1; submitted by A. Irving
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Catalogs:
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.
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Mike Markowitz   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6900 approved meteorites from (Northwest Africa) (plus 2035 unapproved names)

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