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Northwest Africa 6022
Basic information Name: Northwest Africa 6022
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6022
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass:help 327 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  R4
Recommended:  R4    [explanation]

This is 1 of 68 approved meteorites classified as R4.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 6 Oct 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 6022 (NWA 6022)

(Northwest Africa)

Purchased: 2009

Classification: Rumuruti chondrite (R4)

History: The meteorite was purchased from a local meteorite dealer in Erfoud, Morocco.

Physical characteristics: Brownish individual without fusion crust.

Petrography: The meteorite is composed of well separated chondrules (mean diameter about 300 μm) set into abundant brownish matrix. Fe-rich olivine is the dominant mineral phase; more minor phases include low-Ca pyroxene, Ca-pyroxene, sodic feldspar, pentlandite, and troilite. Olivine is compositionally equilibrated, low-Ca pyroxene shows compositional zoning. No metal has been detected; the meteorite appears unbrecciated in the section studied.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2009
Mass (g):327
Pieces:1
Class:R4
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):38.4±0.2 (n=12)
Ferrosilite (mol%):20.9±4.2 (14.4-28.9, n=22)
Wollastonite (mol%):1.1±0.8 (0.5-4.2, n=22)
Classifier:A. Greshake, MNB
Type spec mass (g):21
Type spec location:MNB
Main mass:Stefan Ralew
Comments:Submitted by Ansgar Greshake
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. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
John Lutzon   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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