Meteoritical Bulletin: Entry for Northwest Africa 3223

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Northwest Africa 3223

Basic information

Name: Northwest Africa 3223
This is an OFFICIAL meteorite name.
Abbreviation: NWA 3223
Observed fall: No
Year found: 2002
Country: (Northwest Africa)
Mass: 51 g

Classification
history:

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

Writeup from MB 92:

Northwest Africa 3223

Morocco

Find: 2002

Achondrite (ureilite, polymict)

History: An anonymous finder recovered a single stone of 51 g.

Physical characteristics: The sample is a sub-rounded stone with 60% fusion crust and soft when cut.

Petrography and mineral compositions: (H. Takeda, Chiba and A. Yamaguchi, NIPR). It is composed of medium to coarse (up to 1.6x1.2 mm in size) olivine (Fo_77-80, CaO = 0.3-0.4; Cr₂O₃ = 0.65-0.9 [both wt%; cores]) and pigeonite grains (Fs_18.0Wo_7.5; Cr₂O₃ =1.1-1.3 wt%). Carbonaceous veins typical of ureilites are observed at parts of the thin section and dusty patches of fine-grained opaque minerals decorate the rims of grains.

Classification: Achondrite (ureilite, polymict); minimal shock with rare mosaicism in olivine.

Type specimen: A total of 9.8 g of sample and one thin section are on deposit at NIPR. Fectay hold the main mass.

Data from:
  MB92
  Table 2
  Line 11:

Place of purchase:	Morocco
Date:	2002
Mass (g):	51
Pieces:	1
Class:	Ure
Type spec mass (g):	9.8

Institutions
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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)

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Geography:

Coordinates:

Unknown.

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

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