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Northwest Africa 13727
Basic information Name: Northwest Africa 13727
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13727
Observed fall: No
Year found: 2018
Country: Algeria
Mass:help 774 g
Classification
  history:
Recommended:  R3-5    [explanation]

This is 1 of 23 approved meteorites classified as R3-5.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 21 Feb 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13727 (NWA 13727)

Algeria

Purchased: 2018

Classification: Rumuruti chondrite (R3-5)

History: Purchased by Jesper Grønne in 2018 from a dealer in Agadir, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of discrete well-delineated chondrules plus lithic clasts in a fine grained matrix. Both unequilibrated and equilibrated chondrules are present. Some lithic clasts (Type 5) consist of sparse chondrules in a recrystallized matrix, whereas others consist of separated chondrules in an opaque matrix. Accessory minerals include sodic plagioclase (in the matrix), pyrrhotite, pentlandite, Ti-chromite, merrillite and Cr-magnetite; metal is absent and much of the sulfide is stained orange from secondary alteration.

Geochemistry: Olivine (Fa31.3±17.9, range Fa1.4-54.9, N = 8), low-Ca pyroxene (Fs3.9±2.6Wo1.2±0.6, range Fs2.0-5.7Wo0.8-1.6, N = 2), high-Ca pyroxene (Fs2.1Wo36.9; Fs1.3Wo49.7; Fs13.5Wo43.3; N = 3, plagioclase in chondrule (An89.2Or0.1), plagioclase in matrix (Ab88.4An7.5Or4.1), magnetite (Cr2O3 = 0.34 wt.%).

Classification: R3-5 chondrite breccia.

Specimens: 20.2 g including one polished thin section at UWB; remainder with Mr. J. Grønne.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2018
Mass (g):774
Pieces:3
Class:R3-5
Shock stage:low
Weathering grade:low
Fayalite (mol%):31.3±17.9
Ferrosilite (mol%):3.9±2.6
Wollastonite (mol%):1.2±0.6
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.2
Type spec location:UWB
Main mass:J. Grønne
Comments:Work name JG 015; 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 Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
Find references in NASA ADS:
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1236 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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