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Northwest Africa 13862
Basic information Name: Northwest Africa 13862
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13862
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 3.1 kg
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 20 Dec 2021
Writeup from MB 110:

Northwest Africa 13862 (NWA 13862)

(Northwest Africa)

Purchased: 2018 Nov

Classification: Rumuruti chondrite (R3-5)

History: Purchased by Ziyao Wang in November 2018 from a dealer in Agadir, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of equilibrated Type 4 and Type 5 lithic clasts set in a type 3 host lithology. The type 3 lithology is made of chondrule with apparent diameter 580±390 µm, N = 23) set in a finer grained matrix (brown in thin section) containing albitic plagioclase, Fe sulfide, pentlandite and Ti-chromite.

Geochemistry: Olivine in equilibrated lithic clasts (Fa39.6±0.9, range Fa38.8-40.9, N = 4), olivine in discrete unequilibrated chondrules (Fa25.9±12.9, range Fa10.9-39.7, N = 4), low-Ca pyroxene (Fs20.4±7.1Wo2.0±1.9, range Fs13.6-30.4Wo0.6-4.7, N = 4), subcalcic augite (Fs16.7Wo29.0), augite (Fs9.6±9.7Wo37.8±1.4, range Fs2.7-16.4Wo36.8-38.8, N = 2).

Classification: R3-5 chondrite breccia.

Specimens: 29.5 g including one polished thin section at UWB; remainder with WangZ.

Data from:
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2018 Nov
Mass (g):3100
Shock stage:S2
Weathering grade:low
Fayalite (mol%):25.9±12.9
Ferrosilite (mol%):20.4±7.1
Wollastonite (mol%):2.0±1.9
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):29.5
Type spec location:UWB
Main mass:Z. Wang
Comments:Work name WZY-05; 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)
WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 2021)
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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