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Zag (b)
Basic information Name: Zag (b)
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 1999
Country: Western Sahara
Mass:help 300 g
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  Achondrite-ung
Meteoritical Bulletin:  MB 84  (2000)  Achondrite-prim
MetBase:  v. 7.1  (2006)  Winonaite
Recommended:  Winonaite    [explanation]

This is 1 of 35 approved meteorites classified as Winonaite.   [show all]
Search for other: Primitive achondrites, Winonaites
Writeuphelp
Writeup from MB 84:

Zag (b)

Morocco

Found 1992

Primitive achondrite

A well oriented stone weighing 300 g and covered with fusion crust was found by a Moroccan in search of additional pieces from the Zag fall.  Classification and mineralogy (B. Zanda, MNHNP, and J. Delaney, Rut):  olivine Fa19.4; orthopyroxene, Fs25.7Wo2.3, clinopyroxene, Fs10.5Wo4.9; feldspar, Ab74.6; olivines contain small ( ~ 10 μm) reaction "channels" in which metal (often transformed into sulfide or oxide) is associated with Fs17Wo1 orthopyroxene.  Oxygen isotopes (R. Clayton, UChi):  δ18O = +4.84‰, δ17O = 2.06‰, which places it within the winonaites field and very close to Divnoe.  Specimens:  12.7 g plus thin sections, MNHNP; main mass, 255 g, RadomskyZag (a) will now become a recognized synonym for the Zag fall, although use of this name is discouraged.


Writeup from MB 85:
Zag (b), correction This meteorite was found in 1999. The date listed in MetBull 84 was incorrect.
Plots: O isotopes:  
Institutions
   and collections
MNHNP: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
UChi: University of Chicago, Chicago, IL 60637, United States (institutional address; updated 28 Feb 2011)
Radomsky: Walt Radomsky, Rutgers Meteorite Laboratory, Piscataway, NJ 08854, United States (private address; updated 26 Apr 2005)
Rut: Department of Geological Sciences, Rutgers University, 610 Taylor Road, Piscataway, NJ 08854, United States (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 84, MAPS 35, A199-A225 (2000)
Published in Meteoritical Bulletin, no. 85, MAPS 36, A293-A322 (2001)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Shinishi Kato   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Gerald Armstrong   
Woreczko Jan & Wadi   
Geography:

Western Sahara
Coordinates:
     Recommended::   (27° 20'N, 9° 20'W)

Statistics:
     This is 1 of 82 approved meteorites from Saguia el Hamra, Western Sahara (plus 1 unapproved name)
     This is 1 of 204 approved meteorites from Western Sahara (plus 20 unapproved names)
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