Meteoritical Bulletin: Entry for Northwest Africa 14681

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Northwest Africa 14681

Basic information

Name: Northwest Africa 14681
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14681
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 4.9 kg

Classification
history:

Recommended:

Lunar (troct. anorth.) [explanation]

This is 1 of 6 approved meteorites classified as Lunar (troct. anorth.). [show all]
Search for other: Lunar meteorites

Comments:

Approved 1 Oct 2022

Writeup

Writeup from MB 111:

Northwest Africa 14681 (NWA 14681)

(Northwest Africa)

Purchased: 2021

Classification: Lunar meteorite (troctolitic anorthosite)

History: Purchased from a Moroccan meteorite dealer in 2021.

Physical characteristics: Desert weathered exterior. Sawcut surfaces show a breccia with light gray and dark gray clasts. Reflected light microscopy reveals abundant small vesicles throughout.

Petrography: (C. Agee, UNM) This meteorite is a troctolitic anorthosite (Prinz and Keil, 1977) with plagioclase (~85%), olivine (~10%), and pigeonite (~1%). Minor phases include troilite and chromite. Metal was not detected.

Geochemistry: (A. Ross, UNM) Plagioclase An_96.4±1.5Ab_3.5±1.5Or_0.2±0.1, n=8; olivine Fa_23.8±5.6, Fe/Mn=89±5, n=12; pigeonite Fs_23.4±1.1Wo_15.6±3.9, Fe/Mn=48±6, n=6.

Classification: Lunar (troctolitic anorthosite) based on Stoeffler et al. (1980).

Specimens: 50.1 g on deposit at UNM, Mark Lyon holds the main mass.

Bibliography:

Prinz M. and Keil K. (1977) Mineralogy, petrology and chemistry of ANT-suite rocks from the lunar highlands. Phys. Chem. Earth 10, 215-237 (link)
Stoeffler D., Knoell H.-D., Marvin U.B., Simonds C.H., and Warren, P.H. (1980) Recommended classification and nomenclature of lunar highland rocks - A committee report. In: Conference on the Lunar Highlands Crust, Houston, Tex., November 14-16, 1979, Proceedings. (A81-26201 10-91) New York and Oxford, Pergamon Press, 1980, p. 51-70. (link)

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2021
Mass (g):	4.9 kg
Pieces:	1
Class:	Lunar (troct. anorth.)
Shock stage:	high
Weathering grade:	moderate
Fayalite (mol%):	23.8±5.6
Ferrosilite (mol%):	23.4±1.1
Wollastonite (mol%):	15.6±3.9
Classifier:	C. Agee, UNM
Type spec mass (g):	50.1
Type spec location:	UNM
Main mass:	Mark Lyon
Comments:	Fieldname SMB-21 (ML-25); 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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 111, in preparation (2022)

Find references in NASA ADS:
Find references in Google Scholar:

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 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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