Meteoritical Bulletin: Entry for Northwest Africa 13937

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Northwest Africa 13937

Basic information

Name: Northwest Africa 13937
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13937
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 1000 g

Classification
history:

Recommended:

Lunar (feldsp. breccia) [explanation]

This is 1 of 329 approved meteorites classified as Lunar (feldsp. breccia). [show all]
Search for other: Lunar meteorites

Comments:

Approved 18 Jun 2021

Writeup

help

Writeup from MB 110:

Northwest Africa 13937 (NWA 13937)

(Northwest Africa)

Purchased: 2021 Mar

Classification: Lunar meteorite (feldspathic breccia)

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

Physical characteristics: Eleven dark-grayish fragments without fusion crust.

Petrography: The meteorite displays a dark-grayish interior and is a feldspar-rich fragmental breccia predominantly composed of lithic and mineral clasts in partly shock melted and vesicular matrix. Lithic clasts are gabbroic and basaltic clasts up to 7 mm in size. Dominant minerals are olivine, low-Ca pyroxene, pigeonite, augite, and calcic plagioclase. Minor phases are ilmenite, Ti-bearing chromite, FeS, and kamacite. Some opx-chromite symplectites are present in olivine. The meteorite is highly shocked and plagioclase partly transformed into maskelynite.

Geochemistry: olivine: Fa_23.7±3.4(Fa_18.8-28.0, n=12, FeO/MnO=84±10); low-Ca pyroxene: Fs_22.5±0.2Wo_4.4±0.2(Fs_22.2-22.8Wo_4.0-4.6, n=6, FeO/MnO=48±3); pigeonite: Fs_32.7±0.9Wo_12.7±1.8(Fs_31.7-34.0Wo_10.6-15.9, n=6, FeO/MnO=48±3); augite: Fs_12.3±1.5Wo_39.1±3.4(Fs_11.0-15.2Wo_32.6-41.8, n=6, FeO/MnO=37±2); calcic plagioclase: An_97.4±0.3(An_96.9-97.8, n=10)

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Algeria
Date:	P 2021 Mar
Mass (g):	1000
Pieces:	11
Class:	Lunar (feldsp. breccia)
Shock stage:	high
Weathering grade:	low
Fayalite (mol%):	23.7
Ferrosilite (mol%):	22.5; 32.7; 12.3
Wollastonite (mol%):	4.4; 12.7; 39.1
Classifier:	A. Greshake, MNB
Type spec mass (g):	24.3
Type spec location:	MNB
Main mass:	Hanno Strufe and Ismaily Sidi Mohamed, Erfoud, Morocco
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., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4

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)
Dirk Hohmann

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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