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Northwest Africa 7551
Basic information Name: Northwest Africa 7551
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7551
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 830 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 218 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 6 May 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7551 (NWA 7551)

Morocco

Purchased: 2012

Classification: HED achondrite (Eucrite, monomict)

Physical characteristics: Moderately well-preserved fusion crust that covers ~65 % of the surface.

Petrography: Partially crushed cataclastic cumulate eucrite breccia with protogranular texture of equal amounts of pyroxenes, and plagioclase with minor FeS, chromite, and silica.

Geochemistry: Pigeonite, Fs54.5Wo13.2 (FeO/MnO = 41); augite Fs34.3Wo41.4; plagioclase, An90.2; chromite Cr/(Cr+Al) = 0.80.

Classification: Achondrite (eucrite, monomict)

Specimens: 21.9 g are at PSF; Gregory holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Tucson, AZ
Date:P 2012
Mass (g):830
Pieces:1
Class:Eucrite-mmict
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):54.5
Wollastonite (mol%):13.2
Classifier:T. Bunch and J. Wittke, NAU; P. Sipiera, PSF
Type spec mass (g):21.9
Type spec location:PSF
Main mass:D. Gregory
Comments:Submitted by Bunch
Institutions
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
Gregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1390 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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