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Northwest Africa 470
Basic information Name: Northwest Africa 470
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 470
Observed fall: No
Year found: 1999
Country: Morocco
Mass:help 62.9 g
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  CH
Meteoritical Bulletin:  MB 85  (2001)  CH
MetBase:  v. 7.1  (2006)  CH3
Recommended:  CH3    [explanation]

This is 1 of 26 approved meteorites classified as CH3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CH chondrites, CH-CB family, and Metal-rich meteorites
Writeuphelp
Writeup from MB 85:

Northwest Africa 470

Morocco

Found 1999

Carbonaceous chondrite (CH)

A meteorite weighing 62.9 g was purchased from nomads by S. Afanasiev during an expedition to the Er Rachidia region of the Moroccan Sahara in 2000 April. Mineralogy and classification (M. Ivanova and M. Nazarov, Vernad; M. Petaev, CfA): fusion crust is blackish-brown; there are two populations of chondrules, one with cryptocrystalline textures, 20–50 µm in size, the other with porphyritic olivine-pyroxene or barred olivine textures, >50 µm in size; matrix is absent; contains ~20 vol% metal with a solar Ni/Co ratio; olivine, Fa2.0; pyroxene, Fs2.8; contains CAIs of different types, many grossite-rich. Oxygen isotopes (R. Clayton and T. Mayeda, UChi): δ17O = –0.40·, δ18O = +2.20·, indicating CH-CR clan. Specimens: type specimen, 7.2 g, and thin section, Vernad; main mass with purchaser, S. Afanasiev.

Data from:
  MB85
  Table 4
  Line 124:
Origin or pseudonym:Er Rachidia 001
Latitude:31°59.0'N
Longitude:4°11.2'W
Mass (g):62.9
Pieces:1
Class:CH
Shock stage:S1
Weathering grade:W1
Plots: O isotopes:  
Institutions
   and collections
UChi: University of Chicago, Chicago, IL 60637, United States (institutional address; updated 28 Feb 2011)
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016)
CfA: Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, United States (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 85, MAPS 36, A293-A322 (2001)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Don Edwards   
Shinishi Kato   
Geography:

Morocco
Coordinates:
     Catalogue of Meteorites:   (31° 59'N, 4° 11'W)
     Recommended::   (31° 59' 0"N, 4° 11' 12"W)
Note: the NHM and MetBase coordinates are 0.3 km apart

Statistics:
     This is 1 of 62 approved meteorites from Meknès-Tafilalet, Morocco
     This is 1 of 1417 approved meteorites from Morocco (plus 15 unapproved names) (plus 1 impact crater)
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Synonymshelp: Er Rachidia 001 (From MetBase)

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