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Northwest Africa 13248
Basic information Name: Northwest Africa 13248
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13248
Observed fall: No
Year found: 2018
Country: Niger
Mass:help 70 kg
Classification
  history:
Recommended:  H5-melt breccia    [explanation]

This is 1 of 23 approved meteorites classified as H5-melt breccia.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 28 Mar 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13248 (NWA 13248)

Niger

Purchased: 2018 Mar

Classification: Ordinary chondrite (H5, melt breccia)

History: Found with many other similar stones in the vicinity of Akokan, Niger, and purchased by Aziz Habibi in March 2018 from a dealer in Niger.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) The specimen consists of H5 lithic clasts within a much finer grained matrix (composed of fine, lath-like silicate grains and spherical opaques). Lithic clasts are composed of sparse, relatively small equilibrated chondrules in recrystallized matrices containing relatively abundant metal. Minerals are equilibrated olivine, low-Ca pyroxene, sodic plagioclase, kamacite, taenite, low-Ti chromite and troilite. Clasts have shock stage S2.

Geochemistry: Olivine (Fa18.5±0.1 (range Fa18.4-18.6, N = 4), low-Ca pyroxene (Fs16.1±0.4Wo1.9±0.2 (range Fs15.5-16.4Wo2.1-1.6, N = 4).

Classification: Ordinary chondrite (H5-melt breccia). Paired with Tassédet 004, NWA 12923, NWA 12924 and other material from the same strewnfield.

Specimens: 38.7 g including one polished thin section at UWB; remainder with Mr. A. Habibi.

Data from:
  MB109
  Table 0
  Line 0:
Origin or pseudonym:Akokan
Place of purchase:Niger
Date:P 2018 Mar
Mass (g):70000
Pieces:many
Class:H5-melt breccia
Weathering grade:W0/1
Fayalite (mol%):18.5±0.1
Ferrosilite (mol%):16.1±0.4
Wollastonite (mol%):1.9±0.2
Classifier:A. Irving, UWS, and P. Carpenter, WUSTL
Type spec mass (g):38.7
Type spec location:UWB
Main mass:A. Habibi
Comments:Work name AH 723; submitted by A. Irving
Institutions
   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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Niger
Coordinates:Unknown.

Statistics:
     This is 1 of 69 approved meteorites from Niger (plus 4 unapproved names)

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