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Northwest Africa 5785
Basic information Name: Northwest Africa 5785
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5785
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 1800 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 339 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 10 Dec 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 5785 (NWA 5785)

(Northwest Africa)

Purchased: 2005 Feb

Classification: HED achondrite (Eucrite, polymict)

History: Purchased in Feb 2005 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia consisting of basaltic eucrite clasts composed predominantly of exsolved pigeonite and calcic plagioclase with accessory silica polymoprh, Ti-chromite, troilite and Ni-free metal. Some clasts containing more metal are heavily stained with secondary iron hydroxides.

Geochemistry: Orthopyroxene host (Fs57.8-58.9Wo3.0-2.8, FeO/MnO = 27-28), clinopyroxene exsolution lamellae (Fs26.3-27.2Wo42.8-41.2, FeO/MnO = 26-28).

Classification: Eucrite (polymict).

Specimens: Type specimen plus one polished thin section at PSF; main mass with anonymous collector.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2005 Feb
Mass (g):1800
Pieces:1
Class:Eucrite-pmict
Shock stage:low
Weathering grade:low to m
Ferrosilite (mol%):57.8-58.9; 26.3-27.2
Wollastonite (mol%):3.0-2.8; 42.8-41.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):90
Type spec location:PSF
Main mass:Anonymous
Comments:MC2009a; submitted by P. Sipiera
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
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 6900 approved meteorites from (Northwest Africa) (plus 2035 unapproved names)

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