header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 18 Jan 2021
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:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Northwest Africa 4391
Basic information Name: Northwest Africa 4391
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4391
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 54.8 g
Classification
  history:
Meteoritical Bulletin:  MB 92  (2007)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 350 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 24 Jul 2007
Writeuphelp
Writeup from MB 92:

Northwest Africa 4391

Northwest Africa

Find: 2005

Achondrite (eucrite, polymict)

History: An anonymous finder recovered the meteorite in northwest Africa.The main mass holder acquired the specimen in 2005 in Midelt, Morocco.

Physical characteristics: A single stone weighing, 54.8 g with a grayish color and little fusion crust present was recovered.

Petrography: (A. Greshake, MNB). The meteorite is a polymict breccia consisting of coarse basaltic and mineral clasts set into an abundant fine-grained groundmass. Mineral fragments are dominantly large plagioclase and exsolved low-Ca pyroxene. Minor phases include silica, ilmenite, and Al,Ti-rich chromite.

Mineral compositions: Plagioclase (An85.5-95.9) and pyroxene (Fs41.7-54Wo2.6-20.1).

Classification: Achondrite (eucrite, polymict); moderate shock, moderate weathering.

Type specimens: A total of 11.4 g of sample plus one polished thin section are on deposit at MNB. Ralew holds the main mass.

Data from:
  MB92
  Table 2
  Line 64:
Place of purchase:Midelt, Morocco
Date:2005
Mass (g):54.8
Pieces:1
Class:Euc
Type spec mass (g):11.4
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. 92, MAPS 42, 1647-1694 (2007)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Chladni's Heirs   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7547 approved meteorites from (Northwest Africa) (plus 1970 unapproved names)

Direct link to this page