header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 12 Mar 2024
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:
 
Northwest Africa 4899
Basic information Name: Northwest Africa 4899
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4899
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 8 g
Classification
  history:
Meteoritical Bulletin:  MB 110  (2022)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 595 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 4899 (NWA 4899)

(Northwest Africa)

Purchased: 2007

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Small grayish fragment without fusion crust.

Petrography: The meteorite is composed of up to 4 mm basaltic clasts set in abundant fine-grained recrystallized groundmass dominated by 10-30 µm sized exsolved pyroxene and calcic plagioclase grains. Some larger up to 100 µm sized plagioclase grains are present. Minor phases are silica, chromite, ilmenite, FeS, and metallic iron.

Geochemistry: low-Ca pyroxene: Fs58.2±0.3Wo4.5±0.2 (Fs57.8-58.7Wo4.3-4.7, FeO/MnO=29-31, n=5); Ca-pyroxene: Fs26.3±0.1Wo43.1±0.1 (Fs26.1-26.5Wo43.0-43.3, FeO/MnO=28-33, n=5); calcic plagioclase: An90.1±0.5 (An89.5-90.9, n=5)

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Ouarzazate, Morocco
Date:P 2007
Mass (g):8
Pieces:1
Class:Eucrite
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):58.2; 26.3
Wollastonite (mol%):4.5; 43.1
Classifier:A. Greshake, MNB
Type spec mass (g):1.6
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
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)
Also see:
  This lists the most popular meteorites among people who looked up this meteorite.
Revision
  history:
  This lists important revisions made to data for this record.

Direct link to this page