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Northwest Africa 6220
Basic information Name: Northwest Africa 6220
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6220
Observed fall: No
Year found: 2010
Country: Morocco
Mass:help 197.4 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  R5
Recommended:  R5    [explanation]

This is 1 of 34 approved meteorites classified as R5.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 14 Jan 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 6220 (NWA 6220)

Erfoud, Morocco

Found: Apr 2010

Classification: Rumuruti chondrite (R5)

Physical characteristics: Three fresh fragments of a single stone with well preserved fusion crusts. Cut surfaces reveal numerous chondrules (40–50%).

Petrography: Chondrules have sizes ranging from 200 ?m to 2 mm.They are chemically equilibrated and often rimmed by opaque phases. Matrix is recrystallized and mainly composed of olivine, plagioclase, pyroxene, sulfides, and chromite.

Geochemistry: Olivine Fa39.9±0.3 (Fe/Mn=83); Ca-poor pyroxene Fs31.2±0.5Wo0.3±0.3 (Fe/Mn=59); Ca-rich pyroxene Fs11.7±0.3Wo45.0±0.1 (Fe/Mn=43).

Classification: Likely paired with NWA 6218.

Data from:
  MB103
  Table 0
  Line 0:
State/Prov/County:Erfoud
Origin or pseudonym:Field No. 1004
Date:Apr 2010
Mass (g):197.43
Pieces:3
Class:R5
Fayalite (mol%):39.9±0.3
Ferrosilite (mol%):21.5 (11.5-31.6)
Wollastonite (mol%):22.6 (0.0-45.1)
Classifier:N. Chaumard and B. Devouard, UBP
Type spec mass (g):30.45
Type spec location:MNHNP
Main mass:PThomas
Finder:Philippe Thomas
Comments:Submitted by CHAUMARD NOEL BERTRAND DEVOUARD
Institutions
   and collections
MNHNP: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
PThomas: Philippe Thomas, Meteoritica, La Chave, 07690 St André en Vivarais, France (private address)
UBP: Universite Blaise Pascal, Clermont-Ferrand, France (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Aeroliths Collection Theodossiou   
Andreas Grünemeyer      
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2 approved meteorites from Erfoud, Morocco
     This is 1 of 1394 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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