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 13947
Basic information Name: Northwest Africa 13947
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13947
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 310 g
Classification
  history:
Recommended:  Ureilite    [explanation]

This is 1 of 573 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 6 May 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13947 (NWA 13947)

(Northwest Africa)

Purchased: January, 2021

Classification: Ureilite

History: The meteorite was purchased from a meteorite dealer in Nouadhibou, Mauritania in January, 2021.

Physical characteristics: Brownish rock without fusion crust.

Petrography: The meteorite shows a poikilitic texture consisting of large up to 2.5 mm sized orthopyroxene crystals enclosing rounded olivine grains. Olivine displays characteristic reduced rims where in contact with FeNi-metal or flaky graphite. Some cracks are filled with secondary calcite.

Geochemistry: reduced rims in olivine: Fa4.8-7.3; olivine contains 0.50±0.02 wt% Cr2O3 and 0.26±0.01 wt% CaO; pigeonite contains 1.30±0.04 wt% Cr2O3 and 1.57±0.05 wt% Al2O3

Classification: ureilite (olivine? orthopyroxene type)

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P January, 2021
Mass (g):310
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):21.5±0.1 (n=7)
Ferrosilite (mol%):18.0±0.2 (n=7)
Wollastonite (mol%):4.4±0.1 (n=7)
Classifier:A. Greshake, MNB
Type spec mass (g):48
Type spec location:MNB
Main mass:Salamu Ali
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 7741 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

Direct link to this page