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Northwest Africa 4885
Basic information Name: Northwest Africa 4885
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4885
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 70.6 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  Eucrite-br
Recommended:  Eucrite-br    [explanation]

This is 1 of 218 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 12 Mar 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 4885 (NWA 4885)

(Northwest Africa)

Purchased: 2006

Classification: HED achondrite (Eucrite, brecciated)

History: The meteorite was purchased in 2006 from a local meteorite dealer in Erfoud, Morocco.

Physical characteristics: Five greyish fragments partly covered with fusion crust

Petrography: Brecciated eucrite composed of coarse-grained basaltic clasts set into more fine-grained matrix. Dominant minerals are exsolved pyroxene and calcic plagioclase. Minor phases include silica, chromite, ilmenite, and FeS; no metallic Fe was found.

Geochemistry: low-Ca pyroxene: Fs53.1±2.1Wo9.1±2.7 (Fs50.4-65.0Wo5.6-12.4, n=10, FeO/MnO=29-31); Ca-pyroxene: Fs35.1±6.7Wo32.9±7.7 (Fs26.0-42.3Wo24.1-43.3, n=12, FeO/MnO=27-32); calcic plagioclase: An86.4±5.8 (An78.6-91.3, n=11)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Erfoud, Morooco
Date:P 2006
Mass (g):70.6
Pieces:5
Class:Eucrite-br
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):53.1; 35.1
Wollastonite (mol%):9.1; 32.9
Classifier:A. Greshake, MNB
Type spec mass (g):14.4
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. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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