header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 6 Aug 2022
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 14221
Basic information Name: Northwest Africa 14221
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14221
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 60 g
Classification
  history:
Recommended:  R4    [explanation]

This is 1 of 65 approved meteorites classified as R4.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 17 Oct 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14221 (NWA 14221)

(Northwest Africa)

Purchased: 2021

Classification: Rumuruti chondrite (R4)

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania in 2021.

Physical characteristics: Grayish rock largely covered with fusion crust.

Petrography: The meteorite displays a dark grayish interior, appears unbrecciated and is composed of distinct chondrules (mean diameter about 400 μm) set in a fine grained matrix dominated by ferroan olivine. Some low-Ca pyroxene in chondrules is compositionally unequilibrated. More minor phases include Ca-pyroxene, sodic plagioclase, pentlandite, and ilmenite; no metal has been detected.

Geochemistry: olivine: Fa37.8±0.1 (Fa37.6-38.1, n=10); low-Ca pyroxene: Fs19.0±7.1Wo0.6±0.03 (Fs9.8-28.8Wo0.5-0.6, n=10); Ca-pyroxene: Fs10.2±0.7Wo45.4±1.9 (Fs9.6-12.2Wo40.0-46.4, n=9); feldspar: An8.0-11.7Ab83.7-87.2Or2.7-5.5, n=6

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P 2021
Mass (g):60
Pieces:1
Class:R4
Shock stage:S1
Weathering grade:W1
Fayalite (mol%):37.8
Ferrosilite (mol%):19.0; 10.2
Wollastonite (mol%):0.6; 45.4
Classifier:A. Greshake, MNB
Type spec mass (g):12.4
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 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

Direct link to this page