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Northwest Africa 2085
Basic information Name: Northwest Africa 2085
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2085
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 2.7 kg
Classification
  history:
Meteoritical Bulletin:  MB 89  (2005)  L-melt rock
MetBase:  v. 7.1  (2006)  L-IM
Recommended:  L-imp melt    [explanation]

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

Northwest Africa 2085

Morocco

Found 2003 October

Ordinary chondrite (L melt rock)

A 2.7 kg single stone was purchased in Rissani, Morocco. Description and classification (T. Bunch and J. Wittke, NAU): exceptional melt rock: centimeters-size L chondrite clasts are surrounded by crystallized melt. The melt contains oblate to round, eutectic-textured, masses (up to 2.5 mm) of taenite metal set in troilite. The metal/troilite complexes show strong flow alignment in a matrix of tabular to equant olivine (< 0.8 mm), which has no apparent preferred orientation, and SiO2-rich glass, in addition to small, recrystallized chondrite fragments. Melt olivine, Fa22.8 (22.1 – 23.8); taenite, Ni = 15.4 wt%, range, 13.6 – 16.1 wt%; troilite, Ni = 0.42 wt%; glass, SiO2 = 74.6 wt%, FeO = 3.6 wt%. Clast chondrules and matrix are partially recrystallized from shock effects; olivine, Fa22.2 – 23.9; orthopyroxene, Fs18–19.9Wo1.4-2.0. Shock level, S4 to S6; weathering grade, W1/2. Specimens: type specimen 88.5 g, and one thin section, NAU; main mass, MFarmer.

Data from:
  MB89
  Table 7
  Line 84:
Place of purchase:Rissani
Date:Oct 2003
Mass (g):2700
Pieces:1
Class:L
Shock stage:S6
Fayalite (mol%):22.8
Type spec mass (g):88.5
Comments:melt rock; see separate entry; Undefined note. NAU is Northern Arizona University, Flagstaff, AZ 86011, USA
Institutions
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
MFarmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Mike Farmer   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6781 approved meteorites from (Northwest Africa) (plus 2061 unapproved names)

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