Meteoritical Bulletin: Entry for Northwest Africa 14646

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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: 218 g

Classification
history:

Meteoritical Bulletin:	MB 111	(2023)	Eucrite
Recommended:			Eucrite [explanation]

This is 1 of 598 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 19 Feb 2022

Writeup

help

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: Fs_60.4±0.2Wo_1.9±0.1(Fs_60.1-50.7Wo_1.7-2.0, FeO/MnO=27-29, n=7); augite exsolution lamellae: Fs_27.9±0.6Wo_42.1±1.0(Fs_27.1-28.8Wo_40.7-43.7, FeO/MnO=25-29, n=7); zoned low-Ca-pyroxene: Fs_43.3±10.5Wo_5.1±0.9(Fs_32.6-58.3Wo_3.5-6.4, FeO/MnO=25-30, n=6); olivine: Fa_82.2±0.2(Fa_82.0-82.5, FeO/MnO=37±1, n=7); calcic plagioclase: An_85.9±5.6(An_79.4-92.0, 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 Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?

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Photos:

Credit	Photos
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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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