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Northwest Africa 7820
Basic information Name: Northwest Africa 7820
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7820
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 53 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  LL6
Recommended:  LL6    [explanation]

This is 1 of 2816 approved meteorites (plus 1 unapproved name) classified as LL6.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 28 Jun 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7820 (NWA 7820)

(Northwest Africa)

Purchased: 2013 Feb

Classification: Ordinary chondrite (LL6)

History: Purchased by GHupé in February 2013 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Mostly poikiloblastic texture with rare indistinct, partial chondrules. Olivine, orthopyroxene, clinopyroxene, sodic plagioclase, chromite, altered kamacite and troilite.

Geochemistry: Olivine (Fa29.3-29.8), orthopyroxene (Fs23.8-24.2Wo3.4-2.9), clinopyroxene (Fs10.2-10.8Wo43.0-42.6).

Classification: Ordinary chondrite (LL6).

Specimens: A total of 10.6 g of material and one polished thin section are on deposit at UWB. GHupé holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2013 Feb
Mass (g):53
Pieces:1
Class:LL6
Shock stage:S2
Weathering grade:W1/2
Fayalite (mol%):29.3-29.8
Ferrosilite (mol%):23.8-24.2
Wollastonite (mol%):3.4-2.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):10.6
Type spec location:UWB
Main mass:GHupé
Comments:GH-452; submitted by A. Irving
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7912 approved meteorites from (Northwest Africa) (plus 1974 unapproved names)

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