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Northwest Africa 4830
Basic information Name: Northwest Africa 4830
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4830
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 38 g
Classification
  history:
Meteoritical Bulletin:  MB 94  (2008)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 238 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 17 Apr 2008
Writeuphelp
Writeup from MB 94:

Northwest Africa 4830

Northwest Africa

Find: 2006

Achondrite (eucrite, monomict)

History and physical characteristics: A 38 g fully crusted stone with moderately fresh fusion crust was purchased at the Denver Gem and Mineral Show in September 2006.

Petrography: (T. Bunch and J. Wittke, NAU) This stone is a monomict, eucrite basalt with granoblastic texture. Most of the sample was recrystallized into an assemblage of very fine-grained polygons (<0.03 mm). Vestiges of the original texture show a fabric of divergent plagioclase laths and interstitial pyroxenes. Maximum length of the plagioclase laths is <0.4 mm. Weathering effects are minimal.

Mineral compositions: (relict and recrystallized minerals are essentially the same). Orthopyroxene, Fs60.5Wo2.1 (FeO/MnO = 32); augite, Fs37.4Wo35.5; plagioclase, An93; chromite cr# = 84.

Classification: Achondrite (eucrite, monomict).

Type specimen: A total of 7.7 g is on deposit at NAU. The main mass holder is anonymous.

Data from:
  MB94
  Table 2
  Line 70:
State/Prov/County:Erfoud
Date:2006
Mass (g):78
Pieces:1
Class:Eucrite
Shock stage:extensive
Classifier:T. Bunch and J. Wittke, NAU
Type spec mass (g):16
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:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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