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Northwest Africa 4905
Basic information Name: Northwest Africa 4905
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4905
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 36 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 576 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 17 Oct 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 4905 (NWA 4905)

(Northwest Africa)

Purchased: 2007

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Grayish rock largely covered with fusion crust.

Petrography: Coarse-grained, unbrecciated basalt with subophitic texture predominantly composed of exsolved pyroxene and calcic plagioclase up to 1.5 mm in size. Contains abundant silica. Minor phases include chromite, FeS, and ilmenite. No metallic iron was found.

Geochemistry: low-Ca pyroxene: Fs56.9±0.1Wo6.1±0.1 (Fs56.7-57.2Wo6.0-6.2, FeO/MnO=28-31, n=7); Ca-pyroxene: Fs28.5±0.2Wo41.4±0.2 (Fs28.3-28.5Wo41.1-41.7, FeO/MnO=31-36, n=7); calcic plagioclase: An90.9±1.4 (An88.1-92.8, n=7)

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Ouarzazate, Morocco
Date:P 2007
Mass (g):36
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):56.9; 28.5
Wollastonite (mol%):6.1; 41.4
Classifier:A. Greshake, MNB
Type spec mass (g):7.6
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
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
bphd   
Gregor H.   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9128 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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