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Northwest Africa 13245
Basic information Name: Northwest Africa 13245
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13245
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 966 g
Classification
  history:
Recommended:  Eucrite-melt breccia    [explanation]

This is 1 of 30 approved meteorites classified as Eucrite-melt breccia.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 27 Jun 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13245 (NWA 13245)

(Northwest Africa)

Purchased: 2019 Mar

Classification: HED achondrite (Eucrite, melt breccia)

History: Purchased in Agadir, Morocco by Aziz Habibi

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of lithic clasts (gabbroic to microgabbroic with poikilitic to equigranular textures) and related crystalline debris set within a finer grained, vesicular melt-textured matrix. Minerals in clasts are exsolved pigeonite, calcic plagioclase, silica polymorph, ilmenite, chromite (with variable Al and Ti contents) and troilite. The matrix contains strongly zoned pyroxenes (with ferroan rims of almost pyroxferroite composition) and acicular to plumose plagioclase.

Geochemistry: Gabbroic clasts: Low-Ca pyroxene host (Fs60.9-62.6Wo2.4-4.6, FeO/MnO = 29-33, N = 5), augite exsolution lamellae (Fs27.6-28.3Wo43.1-44.1, FeO/MnO = 30-32, N = 5), plagioclase (An88.2-89.7Or0.2-0.5, N = 4). Matrix pyroxene: augite core (Fs26.4Wo44.2, Fe/MnO = 29), low-Ca pyroxene (Fs60.1Wo2.5, FeO/MnO = 31), ferroan pigeonite rim (Fs81.4Wo15.5, FeO/MnO = 38).

Classification: Eucrite (melt-matrix breccia).

Specimens: 23.3 g in the form of a polished endcut at UWB; remainder with Mr. A. Habibi.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2019 Mar
Mass (g):966
Pieces:many
Class:Eucrite-melt breccia
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):60.9-62.6; 27.6-28.3
Wollastonite (mol%):2.4-4.6; 43.0-44.1
Classifier:A. Irving, UWS, and P. Carpenter, WUSTL
Type spec mass (g):23.3
Type spec location:UWB
Main mass:A. Habibi
Comments:Work name AH 738; 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. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7328 approved meteorites from (Northwest Africa) (plus 1973 unapproved names)

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