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Northwest Africa 3221
Basic information Name: Northwest Africa 3221
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 3221
Observed fall: No
Year found: 2002
Country: Morocco
Mass:help 38.5 g
Meteoritical Bulletin:  MB 92  (2007)  Ureilite-pmict
Recommended:  Ureilite-pmict    [explanation]

This is 1 of 33 approved meteorites classified as Ureilite-pmict.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 24 Jul 2007
Writeup from MB 92:

Northwest Africa 3221


Find: 2002

Achondrite (ureilite, polymict)

History: B. Fectay purchased a single stone of 38.5 g in Rissani, Morocco in 2002.

Physical characteristics: A fragment with 45% fresh black fusion crust with a typical polymict ureilite texture.

Petrography: (H. Takeda, Chiba and A. Yamaguchi, NIPR). The sample is a fragmental breccia with lithic clasts and subrounded mineral fragments embedded in a cataclastic matrix of predominantly ureilitic material. One large clast is a fine-grained carbonaceus chondrite 2.3x1.5 mm in size and another is very heavily shocked ureilite. Mineral fragments include olivine up to 1.8x1.2 mm, pyroxene, Na-rich plagioclase, rare K, Na-rich glassy grain.

Mineral compositions: Pyroxene (Fs8Wo8 - Fs44Wo10 - Fs13Wo34; Cr2O3 of pigeonite = 0.8-1.2 wt%; augite = 1.8 - 2.0 wt%), olivine (Fo74-90; CaO = 0.25- 0.47 wt %; Cr2O3 = 0.42- 0.83 wt% [cores]) and plagioclase (An6-60). High K, Na-rich glassy materials (SiO2 = 66.5, Al2O3 = 11.3, FeO = 8.5, Na2O = 4.2, K2O = 2.1 [all wt%] observed). Coexistence of unshocked olivine and a very heavily shocked ureilite clast 4.4 x 3.2 mm in size (PTS 090,8) as in Dar al Gani 1023 with granoblastic texture. Clast olivines (Fo70-78[cores]).

Classification: Achondrite (ureilite, polymict).

Type specimen: A total of 7.7 g of sample and a thin section are on deposit at NIPR. Fectay hold the main mass.

Data from:
  Table 2
  Line 9:
Place of purchase:Rissani, Morocco
Mass (g):38.5
Type spec mass (g):7.7
   and collections
NIPR: Antarctic Meteorite Research Center, National Institute of Polar Research, 10-3 Midori-cho, Tachikawa, Tokyo 190-8518, Japan; Website (institutional address; updated 9 Dec 2013)
Chiba: Chiba Institute of Technology, Tsudanuma, Narashino, Chiba 275-0016, Japan (institutional address)
Fectay: Bruno Fectay and Carine Bidaut, La Memoire de la Terre SARL, 39800 Aumont, France; Website (private address)
References: Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)
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     This is 1 of 2012 approved meteorites from Morocco (plus 35 unapproved names) (plus 1 impact crater)

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