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Northwest Africa 13982
Basic information Name: Northwest Africa 13982
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13982
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 1535 g
Classification
  history:
Recommended:  R3-6    [explanation]

This is 1 of 27 approved meteorites classified as R3-6.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 18 Jun 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13982 (NWA 13982)

(Northwest Africa)

Purchased: 2020 Jun

Classification: Rumuruti chondrite (R3-6)

History: Purchased in Agadir,Morocco by Aziz Habibi in June 2020.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Very fresh specimen with no staining at all by secondary iron oxyhydroxides. Breccia composed of discrete, well-formed chondrules (both unequilibrated and equilibrated, mean apparent diameter ~500 µm) plus lithic clasts of Type 4 and Type 6 (with triple grain junction texture and no chondrules) set in a much finer grained matrix containing pentlandite, troilite and Ti-chromite. Pentlandite contains a variety of exotic PGE-rich accessory phases, including NiGeFePt. Pd-rich NiGeFePt and AuCuFeSn alloys.

Geochemistry: Olivine in unequilibrated Type 3 chondrules (Fa28.6±12.9, range Fa12.6-41.8, N = 5), olivine in equilibrated Type 4 and Type 7 clasts (Fa38.9±0.3, range Fa38.7-39.3, N = 3), low-Ca pyroxene (Fs15.9±0.8Wo0.5±0.4, range Fs15.3-16.5Wo0.2-0.8, N = 2), pigeonite (Fs19.6Wo7.6), subcalcic augite (Fs28.3Wo22.3), augite (Fs16.0Wo38.2), plagioclase (Ab68.8An29.3Or1.9).

Classification: R3-6 chondrite breccia. This specimen is notable for its freshness and the variety of accessory PGE-rich alloy phases.

Specimens: 24.5 g including one polished thin section at UWB; remainder with Mr. A. Habibi.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2020 Jun
Mass (g):1535
Pieces:7
Class:R3-6
Shock stage:S2
Weathering grade:W0
Fayalite (mol%):28.6±12.9
Ferrosilite (mol%):15.9±0.8; 19.6; 28.3; 16.0
Wollastonite (mol%):0.5±0.4; 7.6; 22.3; 38.2
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):24.5
Type spec location:UWB
Main mass:A. Habibi
Comments:Work name AH 1003; 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. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7810 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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