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Northwest Africa 14465
Basic information Name: Northwest Africa 14465
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14465
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 540 g
Classification
  history:
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 363 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 13 Nov 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14465 (NWA 14465)

(Northwest Africa)

Purchased: 2021 Feb

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by Mbark Arjdal in February 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Breccia composed predominantly of gabbroic and diabasic eucrite clasts and related mineral debris together with <10 vol.% diogenitic orthopyroxene (exhibiting undulose extinction). Other minerals are calcic plagioclase (polycrystalline), exsolved pigeonite, silica polymorph, ilmenite, chromite, troilite, ulvöspinel and altered Fe metal, plus minor secondary barite and calcite.

Geochemistry: Diogenitic orthopyroxene (Fs23.9-25.5Wo1.7-2.0, FeO/MnO = 25-28, N = 2), eucritic low-Ca pyroxene host (Fs59.1-59.5Wo3.9-4.6, FeO/MnO = 31, N = 2), eucritic augite exsolution lamellae (Fs23.5-26.4Wo37.5-40.8, FeO/MnO = 23-25, N = 2), pigeonite (Fs33.7Wo7.8, FeO/MnO = 22; Fs46.1-53.2Wo7.9-19.6, FeO/MnO = 29-30, N = 4), low-Ca pyroxene (Fs35.8-47.9Wo3.7-4.3, FeO/MnO = 26-30, N = 3), plagioclase (An89.1-90.4Or0.4-0.2, N = 4).

Classification: Eucrite (polymict breccia).

Specimens: 54.8 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021 Feb
Mass (g):540
Pieces:5
Class:Eucrite-pmict
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):23.9-25.5; 59.1-59.6; 23.5-26.4; 35.8-47.9; 46.1-5
Wollastonite (mol%):1.7-2.0; 3.9-4.6; 37.5-40.8; 7.9-19.6; 3.7-4.3
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):54.8
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj ZA 10; 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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8037 approved meteorites from (Northwest Africa) (plus 1947 unapproved names)

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