header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 18 Jun 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:
Limit to approved meteorite names
Search text:  
Northwest Africa 13471
Basic information Name: Northwest Africa 13471
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13471
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 100 g
Classification
  history:
Recommended:  Eucrite-melt breccia    [explanation]

This is 1 of 42 approved meteorites classified as Eucrite-melt breccia.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 11 Nov 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13471 (NWA 13471)

(Northwest Africa)

Purchased: Sept 2020

Classification: HED achondrite (Eucrite, melt breccia)

History: The meteorite was bought by the main mass holder from a local meteorite dealer in Mauretania.

Physical characteristics: Dark-grayish rock without fusion crust.

Petrography: The meteorite is a melt breccia predominantly composed of large up to 1 cm sized basaltic and mineral clasts embedded into a recrystallized shock melt matrix. Exsolved pyroxene and calcic plagioclase are the dominant mineral phases. Minerals surrounded by melt show resorbtion features, are partly to completely recrystallized and often display mottled compositional zoning. In recrystallized regions feldspar often shows fibrous textures indicative for crystallization from a melt. Minor phases include silica, FeS, chromite, and ilmenite. No metallic iron has been found.

Geochemistry: low-Ca pyroxene: Fs61.5±1.6Wo2.7±0.6 (Fs60.5-65.6Wo1.9-3.7, n=14, FeO/MnO=26-29); Ca-pyroxene: Fs25.8±2.5Wo43.8±0.7 (Fs23.4-32.6Wo42.1-44.6, n=16, FeO/MnO=25-31); calcic plagioclase: An89.5±0.8 (An87.9-91.0, n=14)

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P Sept 2020
Mass (g):100
Pieces:1
Class:Eucrite-melt breccia
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):61.5; 25.8
Wollastonite (mol%):2.7; 43.8
Classifier:A. Greshake, MNB
Type spec mass (g):20.8
Type spec location:MNB
Main mass:Lucian Cojocaru
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. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7741 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

Direct link to this page