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Northwest Africa 14455
Basic information Name: Northwest Africa 14455
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14455
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 224 g
Recommended:  R4    [explanation]

This is 1 of 67 approved meteorites classified as R4.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 12 Feb 2022
Writeup from MB 111:

Northwest Africa 14455 (NWA 14455)

(Northwest Africa)

Purchased: 2018 Aug

Classification: Rumuruti chondrite (R4)

History: Purchased by Ziyao Wang in August 2018 from a dealer in Guelmim, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed relatively small, equilibrated chondrules plus lithic chondrite clasts are set in a fine grained matrix (~30 vol.%, dark orange-brown in thin section) containing altered sulfides (troilite and pentlandite), chromite (with variable Ti content), ilmenite, secondary barite and Fe oxides. Several micron-sized inclusions of an Ir-Pt arsenide phase (probably sperrylite) were observed within pentlandite.

Geochemistry: Olivine (Fa39.4±0.8, range Fa38.0-40.0, N = 5), low-Ca pyroxene (Fs19.0±8.3Wo0.7±0.5, range Fs10.9-27.8Wo0.2-1.4, N = 4), ferroan pigeonite (Fs60.7±6.1Wo5.5±0.7, range Fs56.4-65.0Wo5.0-6.0, N = 2), augite (Fs24.6±12.9Wo42.3±3.3, range Fs10.2-35.2Wo46.1-40.0, N = 3), plagioclase (Ab79.1An19.6Or1.3).

Classification: R4 chondrite.

Specimens: 22.8 g including one polished thin section at UWB; remainder with WangZ.

Data from:
  Table 0
  Line 0:
Place of purchase:Guelmim
Date:P 2018 Aug
Mass (g):223.9
Shock stage:S2
Weathering grade:moderate
Fayalite (mol%):39.4±0.8
Ferrosilite (mol%):19.0±8.3
Wollastonite (mol%):0.7±0.53
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):22.8
Type spec location:UWB
Main mass:WangZ
Comments:Work name WZY-53; 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. 111, in preparation (2022)
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     This is 1 of 9368 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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