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Northwest Africa 4904
Basic information Name: Northwest Africa 4904
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4904
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 1050 g
Classification
  history:
Recommended:  L3    [explanation]

This is 1 of 793 approved meteorites (plus 1 unapproved name) classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 31 Oct 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 4904 (NWA 4904)

(Northwest Africa)

Purchased: 2006

Classification: Ordinary chondrite (L3)

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

Physical characteristics: Brownish rock without fusion crust.

Petrography: The meteorite shows a chondritic texture with sharply defined, well packed, and partly flattened chondrules (apparent mean diameter about 0.6 mm). Fine-grained interchondrule matrix contains sulfides and FeNi metal.

Geochemistry: Ordinary chondrite (L3). L group from chondrule size and magnetic susceptibility Rochette et al. (2003).

Bibliography:
  • Rochette P., Sagnotti L., Bourot-Denise M., Consolmagno G., Folco L., Gattacceca J., Osete M.L., and Pesonen L. (2003) Magnetic classification of stony meteorites: 1. Ordinary chondrites. Meteorit. Planet. Sci. 38 251-268. (link)
Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2006
Mass (g):1050
Pieces:1
Class:L3
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):12.1±10.4 (0.6-39.8, n=23)
Ferrosilite (mol%):11.2±8.4 (1.1-24.2, n=21)
Wollastonite (mol%):1.5±1.4 (0.4-3.9, n=21)
Magnetic suscept.:4.85
Classifier:A. Greshake, MNB
Type spec mass (g):30.8
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 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:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8745 approved meteorites from (Northwest Africa) (plus 1880 unapproved names)

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