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Northwest Africa 7889
Basic information Name: Northwest Africa 7889
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7889
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 28 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 432 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 10 Dec 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7889 (NWA 7889)

(Northwest Africa)

Purchased: 2013 Feb

Classification: HED achondrite (Eucrite)

History: Purchased by Alexandre Debienne in February 2013 from a dealer in Agadir, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Microgabbroic igneous texture. Composed of calcic plagioclase, exsolved pigeonite, silica polymorph, ilmenite, Ti-poor chromite, Ti-rich chromite and troilite.

Geochemistry: Orthopyroxene host (Fs56.9-57.1Wo3.4-1.8, FeO/MnO = 30-31), clinopyroxene exsolution lamellae (Fs24.1-25.2Wo43.3-43.0, FeO/MnO = 28-29).

Classification: Eucrite (microgabbroic).

Specimens: Type specimen plus one polished probe mount at PSF; main mass with A. Debienne.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2013 Feb
Mass (g):28
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):56.9-57.1; 24.1-25.2
Wollastonite (mol%):3.4-1.8; 43.3-43.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):6
Type spec location:PSF
Main mass:A. Debienne
Comments:AD 13008; 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 6916 approved meteorites from (Northwest Africa) (plus 2027 unapproved names)

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