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Northwest Africa 1836
Basic information Name: Northwest Africa 1836
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1836
Observed fall: No
Year found: 2002
Country: (Northwest Africa)
Mass:help 1102 g
Classification
  history:
Meteoritical Bulletin:  MB 89  (2005)  Eucrite
MetBase:  v. 7.1  (2006)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 616 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Writeuphelp
Writeup from MB online:

Northwest Africa 1836

Morocco

Found 2002

Achondrite (monomict eucrite)

A 1102 g partially crusted, single stone was purchased in Rissani, Morocco in 2003. Classification and mineralogy (T. Bunch and J. Wittke, NAU): highly contorted mass of eucrite clasts with cataclastic mantles that are in turn covered by partially melted to recrystallized masses. Cumulate texture with subophitic enclaves. Clast orthopyroxene, Fs56.4–59Wo2.5–4; exsolution lamellae, Fs43.4-46.3Wo23-25.6; recrystallized zone, Fs54.5–57.5Wo8.4–13.5. Chromite, Cr/(Cr+Al) = 0.85, TiO2 = 14.6 wt. % with exsolution lamellae of ilmenite; plagioclase, An91–93.6. Shock level, S1 to S5. The meteorite is very fresh. Specimens, 25.5 g, NAU*; main mass, Oakes.

Data from:
  MB89
  Table 7
  Line 25:
Place of purchase:Morocco
Date:2002
Mass (g):1102
Pieces:1
Class:Euc
Weathering grade:W0
Ferrosilite (mol%):56.4-59
Type spec mass (g):25.5
Comments:Plag An91-93.6; Undefined note. NAU is Northern Arizona University, Flagstaff, AZ 86011, USA
Data from:
  MB113
  Table 0
  Line 0:
Type spec location:NAU* type specimen now at UWB/ROM. 9.7 g plus one polished thin section at UWB; 6.01 g plus one epoxy mount at ROM.
Comments:Work name 283, thin section OVT1
Institutions
   and collections		 NAU*: Collection discontinued. Specimens redistributed as shown in individual meteorite records, United States (institutional address; updated 24 Jun 2024)
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Oakes: Nelson Oakes, Route 1, House 50C, Uniondale, PA 18470, United States; Website (private address)
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States (institutional address; updated 12 Apr 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
Published in Meteoritical Bulletin, no. 113, in preparation (2024)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Don Edwards   
Meteorites Australia   
Shinishi Kato   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Jay Piatek   
Woreczko Jan & Wadi   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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