Meteoritical Bulletin: Entry for Northwest Africa 2112

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Northwest Africa 2112

Basic information

Name: Northwest Africa 2112
This is an OFFICIAL meteorite name.
Abbreviation: NWA 2112
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass: 67 g

Classification
history:

Meteoritical Bulletin:	MB 89	(2005)	Eucrite
MetBase:	v. 7.1	(2006)	Eucrite
Recommended:			Eucrite [explanation]

This is 1 of 508 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Writeup

Writeup from MB online:

Northwest Africa 2112

Northwest Africa

Found 2003

Achondrite (eucrite)

A 67 g partial stone with fresh fusion crust was purchased in Erfoud, Morocco, 2004 April. Description and classification (T. Bunch and J. Wittke, NAU): highly crushed monomict, granular to subophitic eucrite breccia; mm-sized (up to 2.4 mm) orthopyroxene and plagioclase both of which show prominent twinning; orthopyroxene also contains thin exsolution lamellae of Ca-rich pyroxene. Orthopyroxene, Fs_46.5Wo_2.8; augite, F₂₆Wo_34.2; plagioclase, An₉₁, chromite, cr# = 81.2 and mg# = 23.4; metal, Ni = 0.56 wt. %, and minor ilmenite. Shock level is moderate with very thin melt veins that transgress the entire surface of a 5 cm long slice; limited maskelynite development. No apparent internal weathering. Specimens: type sample, 14.4 g NAU; main mass, Strufe.

Data from:
  MB89
  Table 7
  Line 94:

Place of purchase:	Erfoud
Date:	2003
Mass (g):	67
Pieces:	1
Class:	Euc
Shock stage:	S2
Weathering grade:	W1
Ferrosilite (mol%):	46.5
Classifier:	Ted Bunch, NAU
Type spec mass (g):	14.4
Type spec location:	NAU
Main mass:	Strufe
Comments:	Augite Fs26Wo34.2; Plag An91

Institutions
and collections

NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)

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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Dirk Hohmann

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7820 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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