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Northwest Africa 4898
Basic information Name: Northwest Africa 4898
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4898
Observed fall: No
Year found: 2007
Country: Morocco
Mass:help 137 g
Classification
  history:
Meteoritical Bulletin:  MB 93  (2008)  Lunar
Recommended:  Lunar    [explanation]

This is 1 of 106 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 14 Jan 2008
Revised 4 Aug 2008: final writeup
Writeuphelp
Writeup from MB 93:

Northwest Africa 4898

Morocco

Find: 2007

Achondrite (lunar basalt)

History: The meteorite was found by an anonymous finder in northwest Africa and bought by the main mass holder in Quarzazate, Morocco.

Physical characteristics: One fragment almost completely covered with fusion crust weighing 137 g was found.

Petrography: (A. Greshake, MNB). The meteorite exhibits a spherulitic texture of dominantly lath-shaped plagioclase, pyroxene, and skeletal ilmenite. Olivine occurs as single larger crystals often containing Ti-rich chromite inclusions. Plagioclase is Ca-rich and has been completely transformed into maskelynite during shock metamorphism; pyroxene is compositionally zoned Ti-rich pigeonite and augite. Minor phases include FeNi-metal and troilite.

Geochemistry: Plagioclase (An92.6-96.5), olivine (Fa26.3-27.2; FeO/MnO = 73-92), pyroxene (Fs25.1-58.7Wo13.2-34; FeO/ MnO = 42-76).

Classification: Achondrite (lunar basalt); extensive shock, minimal weathering. Specimens: A total of 21.1 g plus one polished thin section are on deposit at MNB. Ralew holds the main mass.

Submitted by: A. Greshake, MNB.

Data from:
  MB93
  Table 2
  Line 149:
Place of purchase:Quarzazate, Morocco
Date:30-Jun-09
Mass (g):137
Pieces:1
Class:Lunar
Type spec mass (g):21.1
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. 93, MAPS 43, 571-632 (2008)
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Photos:
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    (Caution, these are of unknown reliability)
Solar Anamnesis         
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)
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Revision
  history:
  This lists important revisions made to data for this record.

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