Meteoritical Bulletin: Entry for Northwest Africa 14578

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Northwest Africa 14578

Basic information

Name: Northwest Africa 14578
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14578
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 8 g

Classification
history:

Meteoritical Bulletin:	MB 111	(2023)	Achondrite-ung
Recommended:			Achondrite-ung [explanation]

This is 1 of 151 approved meteorites classified as Achondrite-ung. [show all]
Search for other: Achondrites, Ungrouped achondrites

Comments:

Approved 12 Feb 2022

Writeup

help

Writeup from MB 111:

Northwest Africa 14578 (NWA 14578)

(Northwest Africa)

Purchased: 2021

Classification: Ungrouped achondrite

History: Purchased by Mark Lyon from a meteorite dealer and now owned by Frank Thompson and Kasper Dahl Finderup.

Physical characteristics: Saw-cut slice surface reveals a polycrystalline aggregate of light green, dark gray and white grains up to 1 mm in size.

Petrography: (A. Ross and C. Agee, UNM) Microprobe analysis and reflected light microscopy of a polished mount shows a texturally and compositionally equilibrated mosaic of major mineral phases diopside, forsterite, and plagioclase. Minor phases, Cr-troilite and Fe-metal (low-Ni) were also detected. Both forsterite and diopside are chromium-bearing.

Geochemistry: (A. Ross, UNM) Forsterite Fa_2.3±0.0, Cr₂O₃=0.37±0.01, Fe/Mn=26±2, n=2; diopside Fs_0.9±0.0Wo_45.8±0.1, Cr₂O₃=0.97±0.01, Fe/Mn=18±8, n=6; plagioclase An_88.6±1.1Ab_11.2±1.1, n=4.

Classification: Achondrite-ung, very likely paired with NWA 7325.

Specimens: 1.6 g on deposit at UNM. Frank Thompson and Kasper Dahl Finderup hold the main mass

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Northwest Africa
Date:	P 2021
Mass (g):	8
Pieces:	1
Class:	Achondrite-ung
Shock stage:	low
Weathering grade:	low
Fayalite (mol%):	2.3±0.0
Ferrosilite (mol%):	0.9±0.0
Wollastonite (mol%):	45.8±0.1
Classifier:	C. Agee, UNM
Type spec mass (g):	1.6
Type spec location:	UNM
Main mass:	Frank Thompson and Kasper Dahl Finderup
Comments:	Fieldname ML-12; submitted by C. Agee

Institutions
and collections

UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Thompson: Edwin Thompson, 5150 Dawn St., Lake Oswego, OR 97035, United States (private address)

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)
FRANK THOMPSON

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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Revision
history:

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