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Northwest Africa 1839
Basic information Name: Northwest Africa 1839
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1839
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 121.8 g
Classification
  history:
Meteoritical Bulletin:  MB 89  (2005)  L7
MetBase:  v. 7.1  (2006)  L7
Recommended:  L7    [explanation]

This is 1 of 30 approved meteorites classified as L7.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Writeuphelp
Writeup from MB 89:

Northwest Africa 1839

Morocco

Found 2003

Ordinary chondrite (L7)

A 121.8 g, partially crusted stone was purchased in Rissani, Morocco in June 2003. Description and classification (T. Bunch and J. Wittke, NAU): The meteorite contains polygonal, equigranular (~1 mm grain size) crystals; no relict chondrules; prominent twinning in plagioclase. Mineral modes: orthopyroxene, 37 vol. %; olivine, 35 %; plagioclase, 12 %; Ca-rich pyroxene, 6 %; troilite, 4.5 %; metal (taenite only), 3.5 %; chromite, 2 %. Very homogeneous; silicate compositional range is within the analytical precision of ± 0.2 mol %. Orthopyroxene, Fs19.1Wo1.3, Fe/Mn = 41; olivine, Fa22.0, Fe/Mn = 63 plagioclase, An53.4Or2.2; clinopyroxene, Fs7.2Wo47; taenite, Ni = 16 .7 wt %; chromite, Cr/(Cr+Al) = 0. 73. Shock level, S1; weathering grade is W2. Specimens: 20.1 g, NAU; main mass, Oakes.

Data from:
  MB89
  Table 7
  Line 28:
Date:2003
Mass (g):121.8
Pieces:1
Class:L7
Classifier:
Type spec mass (g):20.1
Institutions
   and collections		 NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Oakes: Nelson Oakes, Route 1, House 50C, Uniondale, PA 18470, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Don Edwards   
Meteorites Australia   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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