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Northwest Africa 4825
Basic information Name: Northwest Africa 4825
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4825
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 226 g
Classification
  history:
Meteoritical Bulletin:  MB 94  (2008)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 391 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 17 Apr 2008
Writeuphelp
Writeup from MB 94:

Northwest Africa 4825

Northwest Africa

Find: 2006

Achondrite (eucrite, polymict)

History and physical characteristics: A 226 g complete stone with moderately fresh fusion crust was purchased in Tucson at the Tucson Gem and Mineral Show in January 2007. 

Petrography: (J. Wittke and T. Bunch, NAU) A brecciated polymict eucrite with cataclastic flow veins and partially recrystallized matrix. Consists of cumulate, subophitic, and ophitic basalt clasts. A portion of the plagioclase was converted to maskelynite by shock and most pyroxenes are shock-decorated. Weathering grade is very low. 

Mineral compositions: subophitic orthopyroxene host, Fs56.8Wo3.6 (FeO/MnO = 30–32); exsolution lamellae, Fs29 Wo39.5. Pigeonite is Fs56.7Wo8.8 and plagioclase is An90.2–94.5. Minor minerals include silica, chromite, ilmenite, and FeS. 

Classification: Achondrite (eucrite, polymict). 

Type specimen: A total of 23.1 g is on deposit at NAU. The main mass holder is anonymous.

Data from:
  MB94
  Table 2
  Line 67:
State/Prov/County:Erfoud
Date:2007
Mass (g):226
Pieces:1
Class:Howardite
Shock stage:moderate
Classifier:T. Bunch and J. Wittke, NAU
Type spec mass (g):23.8
Type spec location:NAU
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. 94, MAPS 43, 1551-1588 (2008)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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