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Northwest Africa 14147
Basic information Name: Northwest Africa 14147
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14147
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1053 g
Classification
  history:
Meteoritical Bulletin:  MB 110  (2022)  R3-4
Recommended:  R3-4    [explanation]

This is 1 of 12 approved meteorites classified as R3-4.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 31 Aug 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14147 (NWA 14147)

(Northwest Africa)

Purchased: 2021 Nov

Classification: Rumuruti chondrite (R3-4)

History: Purchased by John Higgins in November 2021 from a dealer in Ouarzazate, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of discrete unequilibrated chondrules (apparent diameter 500 ± 250 µm, N = 25) plus Type 3 and Type 4 chondrite lithic clasts, mineral grains and a large (2 cm) melt rock clast, all set in a fine grained matrix (20 vol.% , pale orange in thin section). Accessory phases in all components are pyrrhotite, pentlandite and sodic plagioclase. The fine grained melt rock clast consists of strongly-zoned euhedral olivine grains (mean grainsize ~50 µm) accompanied by chromite, pyrrhotite, pentlandite and interstitial glass.

Geochemistry: Olivine in unequilibrated chondrules (Fa33.8±16.0, range Fa13.8-56.4, N = 6), olivine in melt rock clast (core Fa20.6, rim Fa 62.7; N = 2), olivine in matrix (Fa41.0±0.6, range Fa40.5-41.4, N = 2), low-Ca pyroxene (Fs19.8±9.3Wo1.6±1.7, range Fs10.7-27.9Wo0.4-4.0, N = 4), augite (Fs21.7Wo38.6).

Classification: R3-4 chondrite breccia with melt-rock clasts. The unusual melt-rock clasts in this specimen resemble those described in DaG 013, PCA 91241 and LAP 031275 by Lunning et al. (2018).

Specimens: 51 g including one polished thin section at UWB; remainder with Mr. J. Higgins.

Bibliography:
  • Lunning N.G., Bischoff A., McCoy T.J., and Corrigan C.M. (2018) Melt clasts in R chondrites: indigenous and foreign. 49th Lunar and Planetary Science Conference, #1552. (link)
Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Ouarzazate
Date:P 2021 Nov
Mass (g):1053
Pieces:1
Class:R3-4
Shock stage:S2
Weathering grade:low
Fayalite (mol%):33.8±16.0
Ferrosilite (mol%):19.8±9.3
Wollastonite (mol%):1.6±1.7
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):51
Type spec location:UWB
Main mass:J. Higgins
Comments:Work name JH21-1; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
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
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names)
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