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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 23 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 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 8777 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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