|Northwest Africa 6221|
|Basic information||Name: Northwest Africa 6221|
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6221
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass: 109.4 g
This is 1 of 75 approved meteorites classified as Lunar (feldsp. breccia). [show all]
Search for other: Lunar meteorites
|Comments:||Approved 19 Jan 2012|
Writeup from MB 100:
Northwest Africa 6221 (NWA 6221)
Purchased: Apr 2010
Classification: Lunar meteorite (feldspathic breccia)
History: Purchased by P. Thomas in April 2010 from a dealer who reported that this stone was found near Geltat Zemmour.
Physical characteristics: One single stone, dark gray with white clasts.
Petrography: (A. Jambon, O. Boudouma, D. Badia) Small mineral clasts in a fine-grained matrix with some heterogeneous glass (impact melt glass). Contains plagioclase, pigeonite, augite, ilmenite, olivine, merrilite. Rare lithic clasts.
Geochemistry: Feldspar An96-89. Augite (Fs27-22Wo40-30, Fe/Mn=60). Olivine (Fa=12-29, Fe/Mn=60). Ilmenite with 6% MgO. Bulk composition (R. Korotev, WUSL): FeO 6.6 wt%, Sc 9.7 ppm, Ni 1120 ppm, Sm 5.7 ppm, Th 1.7 ppm.
UPVI: Université Pierre et Marie Curie (Paris VI),Case 110, 4 Place Jussieu, 75005 Paris, France (institutional address; updated 5 Oct 2014)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
|References:||Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)|
This is 1 of 5000 approved meteorites from (Northwest Africa) (plus 2205 unapproved names)
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