Meteoritical Bulletin: Entry for Northwest Africa 4926

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Northwest Africa 4926

Basic information

Name: Northwest Africa 4926
This is an OFFICIAL meteorite name.
Abbreviation: NWA 4926
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass: 37 g

Classification
history:

Recommended:

Diogenite-olivine [explanation]

This is 1 of 15 approved meteorites classified as Diogenite-olivine. [show all]
Search for other: Achondrites, Diogenites, and HED achondrites

Comments:

Approved 11 Dec 2021

Writeup

Writeup from MB 110:

Northwest Africa 4926 (NWA 4926)

(Northwest Africa)

Purchased: 2006

Classification: HED achondrite (Diogenite)

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

Physical characteristics: Light-grayish to orange coloured rock partly covered with fusion crust.

Petrography: The meteorite displays a light orange interior and is a fragmental breccia composed of up to 3.5 mm sized low Ca-pyroxene grains in fine-grained clastic, related matrix. It contains euhedral to subhedral compositionally weakly zoned olivine grains. Minor phases include calcic plagioclase, chromite, FeS, and metal.

Geochemistry: low-Ca pyroxene: Fs_24.1±0.2Wo_3.5±0.1(Fs_23.8-24.5Wo_3.4-3.6, n=7, FeO/MnO=29-30); olivine: Fa_26.4±1.0(Fa_25.4-28.5, n=7, FeO/MnO=44±2); calcic plagioclase: An_86.6±2.6(An_82.7-90.4, n=7)

Classification: Diogenite, olivine-bearing

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2006
Mass (g):	37
Pieces:	1
Class:	Diogenite
Shock stage:	low
Weathering grade:	moderate
Fayalite (mol%):	26.4
Ferrosilite (mol%):	24.1
Wollastonite (mol%):	3.5
Classifier:	A. Greshake, MNB
Type spec mass (g):	7.8
Type spec location:	MNB
Main mass:	Stefan Ralew
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 110, in preparation (2021)

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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
aranemac	Photo added 19 Apr 2022

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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