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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:
Recommended:  R3-4    [explanation]

This is 1 of 11 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, 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 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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