Meteoritical Bulletin: Entry for Northwest Africa 5913

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Northwest Africa 5913

Basic information

Name: Northwest Africa 5913
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5913
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass: 217 g

Classification
history:

Meteoritical Bulletin:	MB 110	(2022)	Eucrite-br
Recommended:			Eucrite-br [explanation]

This is 1 of 237 approved meteorites classified as Eucrite-br. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 31 Oct 2021

Writeup

help

Writeup from MB 110:

Northwest Africa 5913 (NWA 5913)

(Northwest Africa)

Purchased: 2009

Classification: HED achondrite (Eucrite, brecciated)

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

Physical characteristics: Grayish rock with some fusion crust.

Petrography: The meteorite shows a dark grayish interior and is a polymict breccia composed of lithic and mineral clasts up to 6 mm in size set into fine-grained clastic matrix. Lithic clasts are dark impact melt fragments and basaltic clasts mostly showing intersertal texture with domains of recrystallized mesostasis. Main minerals are exsolved pyroxene and calcic plagioclase. Minor phases are silica, chromite, ilmenite, FeS, and metallic iron.

Geochemistry: low-Ca pyroxene: Fs_54.3±0.7Wo_2.5±0.5(Fs_52.8-55.2Wo_1.9-3.8, FeO/MnO=30-33, n=10); Ca-pyroxene: Fs_26.2±0.9Wo_41.6±1.2(Fs_24.4-27.5Wo_40.3-44.1, FeO/MnO=27-31, n=10); calcic plagioclase: An_88.9±2.3(An_84.0-92.6, n=10)

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Marrakesh, Morocco
Date:	P 2009
Mass (g):	217
Pieces:	1
Class:	Eucrite-br
Shock stage:	moderate
Weathering grade:	low
Ferrosilite (mol%):	54.3; 26.2
Wollastonite (mol%):	2.5; 41.6
Classifier:	A. Greshake, MNB
Type spec mass (g):	22
Type spec location:	MNB
Main mass:	André Knöfel
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

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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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