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Northwest Africa 4496
Basic information Name: Northwest Africa 4496
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4496
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 19 g
Classification
  history:
Meteoritical Bulletin:  MB 91  (2007)  Eucrite-cm
Recommended:  Eucrite    [explanation]

This is 1 of 509 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 28 Mar 2007
Writeuphelp
Writeup from MB 91:

Northwest Africa 4496

Morocco

Find: 2006

Achondrite (eucrite, cumulate)

History: A stone was found by an individual while tending to a goatherd and purchased in Rissani in July 2006.

Physical characteristics: A complete and elongated 19 g stone with fresh fusion crust.

Petrography: (J. Wittke and T. Bunch, NAU ) Fine- to medium-grain-size, monomict cumulate eucrite with plastic flow features. Clusters of interpenetrating plagioclase crystals that display prominent albite twinning, enclose pyroxenes.

Mineral compositions: Orthopyroxene (Fs59.7–61Wo3.8; FeO/ MnO = 31–33, n = 15), pigeonite (Fs52.1–55Wo6.9–11.2), ferroaugite (Fs47.8Wo27.2), plagioclase (An89–92), chromite (Cr/Cr+Al = 69).

Classification: Achondrite, (eucrite, cumulate, monomict breccia); minimal shock and weathering.

Type specimen: A total of 4.1 g and one thin section are on deposit at NAU. The main mass holder is anonymous.

Data from:
  MB91
  Table 2
  Line 350:
Place of purchase:Rissani, Morocco
Date:2006
Mass (g):19
Pieces:1
Class:Euc
Weathering grade:minimal
Ferrosilite (mol%):59.7-61.0
Classifier:T. Bunch and J. Wittke, NAU
Type spec mass (g):4.1
Type spec location:NAU
Main mass:anonymous
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. 91, MAPS 42, 413-466 (2007)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7859 approved meteorites from (Northwest Africa) (plus 1961 unapproved names)

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