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Northwest Africa 14646
Basic information Name: Northwest Africa 14646
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14646
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 218 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 555 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 19 Feb 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14646 (NWA 14646)

(Northwest Africa)

Purchased: December, 2021

Classification: HED achondrite (Eucrite)

History: The meteorite was purchased from a meteorite dealer in Morocco.

Physical characteristics: Fifteen light grayish fragments some of which almost completely covered with fusion crust.

Petrography: The meteorite is a breccia composed of coarse-grained basaltic regions dominated by up to 1 mm sized often lath-shaped plagioclase and compositionally zoned low-Ca pyroxene and more fine-grained regions with 20 to 200 mm sized exsolved pyroxene and calcic plagioclase. Minor phases include fayalite, silica, Ti-poor chromite, ilmenite, and FeS. No metallic iron detected.

Geochemistry: low-Ca pyroxene host to augite exsolution lamellae: Fs60.4±0.2Wo1.9±0.1 (Fs60.1-50.7Wo1.7-2.0, FeO/MnO=27-29, n=7); augite exsolution lamellae: Fs27.9±0.6Wo42.1±1.0 (Fs27.1-28.8Wo40.7-43.7, FeO/MnO=25-29, n=7); zoned low-Ca-pyroxene: Fs43.3±10.5Wo5.1±0.9 (Fs32.6-58.3Wo3.5-6.4, FeO/MnO=25-30, n=6); olivine: Fa82.2±0.2 (Fa82.0-82.5, FeO/MnO=37±1, n=7); calcic plagioclase: An85.9±5.6 (An79.4-92.0, n=7)

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P December, 2021
Mass (g):218
Pieces:15
Class:Eucrite
Shock stage:low
Weathering grade:low
Fayalite (mol%):82.2
Ferrosilite (mol%):60.4; 27.9; 43.3
Wollastonite (mol%):1.9; 42.1; 5.1
Classifier:A. Greshake, MNB
Type spec mass (g):22.4
Type spec location:MNB
Main mass:Mateusz Szyszka
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. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Robert Smart   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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