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Northwest Africa 7549
Basic information Name: Northwest Africa 7549
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7549
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 77.3 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 7549 (NWA 7549)

Northwest Africa

Purchased: 2012

Classification: HED achondrite (Eucrite, monomict)

Physical characteristics: Very fresh fusion crust with light-gray interior.

Petrography: Monomict subophitic basaltic breccia with thin glassy shock-melt veins interstial to mostly cm-size breccia fragments. This stone contains orthopyroxene, augite, chromite, metal, silica, and FeS.

Geochemistry: Orthopyroxene, Fs55.2Wo4.5; augite, Fs30.1Wo42; plagioclase, An90.4; chromite Cr/[Cr +Al] = 0.78.

Classification: Achondrite (eucrite, monomict)

Specimens: A total of 13 g are on deposit at PSF, the main mass is held by D. Gregory

Data from:
  MB102
  Table 0
  Line 0:
Date:P 2012
Mass (g):77.3
Pieces:1
Class:Eucrite-mmict
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):55.2
Wollastonite (mol%):4.5
Classifier:T. Bunch and J. Wittke, NAU; P. Sipiera, PSF
Type spec mass (g):15.6
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:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6916 approved meteorites from (Northwest Africa) (plus 2027 unapproved names)

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