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Northwest Africa 13233
Basic information Name: Northwest Africa 13233
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13233
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 868 g
Classification
  history:
Recommended:  Eucrite-melt breccia    [explanation]

This is 1 of 29 approved meteorites classified as Eucrite-melt breccia.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 10 Mar 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13233 (NWA 13233)

(Northwest Africa)

Purchased: 2019

Classification: HED achondrite (Eucrite, melt breccia)

History: The meteorite was reportedly found near Dakhla city and purchased by the main mass holder from a meteorite dealer in Morocco.

Physical characteristics: Dark grayish rock without fusion crust.

Petrography: The meteorite is a melt breccia predominantly composed of large up to 600 mm sized pyroxene grains set into a feldspar-dominated matrix. Pyroxenes are completely recrystallized and display mottled compositional zoning. Feldspar often show fibrous textures indicative for crystallization from a melt. No lithic clasts have been encountered. Minor phases include silica, chromite, and ilmenite. No metallic iron has been found.

Geochemistry: pyroxene: Fs52.8±3.7Wo10.0±3.9 (Fs47.1-57.0Wo4.9-18.5, n=14, FeO/MnO=26-31); calcic plagioclase: An90.7±1.1 (An89.5-92.9, n=11)

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2019
Mass (g):868
Pieces:1
Class:Eucrite-melt breccia
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):52.8
Wollastonite (mol%):10.0
Classifier:A. Greshake, MNB
Type spec mass (g):20.5
Type spec location:MNB
Main mass:Said Yousfi
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Photos:
CreditPhotos
Public domain photographs:
Ansgar Greshake   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7222 approved meteorites from (Northwest Africa) (plus 1995 unapproved names)

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