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Northwest Africa 4764
Basic information Name: Northwest Africa 4764
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4764
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 31.3 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 537 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 4764 (NWA 4764)

(Northwest Africa)

Purchased: 2007

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Grayish rock partly covered with fusion crust.

Petrography: Unbrecciated, coarse-grained specimen with granular texture. Main minerals are up to 800 µm sized exsolved pyroxene and calcic plagioclase. Minor phases include silica, chromite, FeS, and ilmenite. No metallic iron was found.

Geochemistry: low-Ca pyroxene: Fs59.0±1.3Wo3.2±1.9 (Fs56.2-60.1Wo1.7-7.7, FeO/MnO=28-30, n=13); Ca-pyroxene: Fs25.9±0.7Wo43.4±0.9 (Fs24.8-27.0Wo42.0-45.0, FeO/MnO=27-32, n=12); calcic plagioclase: An90.1±0.5 (An89.4-91.1, n=14)

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2007
Mass (g):31.3
Pieces:1
Class:Eucrite
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):59.0; 25.9
Wollastonite (mol%):3.2; 43.4
Classifier:A. Greshake, MNB
Type spec mass (g):6.8
Type spec location:MNB
Main mass:Hanno Strufe
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8025 approved meteorites from (Northwest Africa) (plus 1951 unapproved names)

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