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Northwest Africa 14739
Basic information Name: Northwest Africa 14739
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14739
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 315 g
Classification
  history:
Recommended:  Diogenite-melt breccia    [explanation]

This is 1 of 8 approved meteorites classified as Diogenite-melt breccia.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 20 Jun 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14739 (NWA 14739)

(Northwest Africa)

Purchased: 2021 Nov

Classification: HED achondrite (Diogenite, melt breccia)

History: Purchased by Aziz Habibi in November 2021 from a dealer in Guelmim, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) The meteorite consists predominantly of a fine grained, gray quenched melt rock lithology of diogenitic composition plus sparse gabbroic clasts of eucritic composition (up to 2 cm across). Eucritic material comprises < 10 vol.% of the specimen overall. The dominant diogenitic lithology (in part vesicular) consists of very fine grained, acicular orthopyroxene with accessory kamacite, pentlandite and troilite, and encloses angular clasts of diogenitic orthopyroxene, olivine, calcic plagioclase and some eucritic pyroxenes. A gabbroic eucrite clast in the studied endcut is composed predominantly of exsolved pigeonite and calcic plagioclase.

Geochemistry: Orthopyroxene (Fs20.4-24.1Wo1.2-1.3, FeO/MnO = 24-30, N = 2; Fs35.6-38.4Wo3.4-2.1, FeO/MnO = 31-33, N = 2), olivine (Fa11.9-18.6, FeO/MnO = 39-43, N = 3), eucritic low-Ca pyroxene (Fs52.2-65.1Wo3.0-6.5, FeO/MnO = 31-34, N = 3), eucritic augite (Fs31.8Wo43.4, FeO/MnO = 33), pigeonite (Fs30.0Wo14.4, FeO/MnO = 31), eucritic plagioclase (An75.6Or1.7), anorthite (An91.4-93.4Or0.2-0.1, N = 2).

Classification: Diogenite (melt rock matrix breccia with eucrite clasts).

Specimens: 21.4 g in the form of a polished endcut at UWB; remainder with Mr. A. Habibi.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Guelmim
Date:P 2021 Nov
Mass (g):315
Pieces:1
Class:Diogenite-melt breccia
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):11.9-18.6
Ferrosilite (mol%):20.4-24.1; 52.2-65.1; 35.6-38.4; 31.8
Wollastonite (mol%):1.2-1.3; 2.3-6.5; 2.1-3.4; 43.4
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):21.4
Type spec location:UWB
Main mass:A. Habibi
Comments:Work name AH 704; submitted by A. Irving
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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