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Northwest Africa 14075
Basic information Name: Northwest Africa 14075
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14075
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1644 g
Recommended:  R3-5    [explanation]

This is 1 of 22 approved meteorites classified as R3-5.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 31 Aug 2021
Writeup from MB 110:

Northwest Africa 14075 (NWA 14075)

(Northwest Africa)

Purchased: 2021 Jan

Classification: Rumuruti chondrite (R3-5)

History: Purchased by Eric Twelker in January 2021 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Complex breccia composed of discrete well-formed, unequilibrated chondrules (apparent diameter 570±230 µm, N = 24) and a variety of lithic chondrite clasts (of petrologic types 3, 4 and 5) set in a fine grained matrix (pale orange in thin section) containing accessory pyrrhotite, pentlandite, chromite, ilmenite and sodic plagioclase, plus rare chalcopyrite and Cr-bearing magnetite.

Geochemistry: Olivine (Fa31.4±17.8, range Fa1.8-51.7, N = 8), low-Ca pyroxene (Fs20.0±13.9Wo1.6±0.7, range Fs2.9-31.7Wo0.8-2.6, N = 4), diopside (Fs2.8±1.3Wo40.8±2.9, range Fs1.8-3.7Wo42.8-38.7, N = 2), plagioclase (Ab83.8An11.7Or4.5), magnetite (Cr2O3 1.6 wt.%).

Classification: R3-5 chondrite breccia.

Specimens: 20.5 g including one polished thin section at UWB; remainder with Mr. E. Twelker.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021 Jan
Mass (g):1644
Shock stage:S2
Weathering grade:low
Fayalite (mol%):31.4±17.8
Ferrosilite (mol%):20.0±13.9
Wollastonite (mol%):1.6±0.7
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.5
Type spec location:UWB
Main mass:E. Twelker
Comments:Work name ET21-3; submitted by A. Irving
   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)
Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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