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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 24 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 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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     This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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