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Northwest Africa 7877
Basic information Name: Northwest Africa 7877
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7877
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 104 g
Meteoritical Bulletin:  MB 102  (2013)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 400 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 30 Sep 2013
Writeup from MB 102:

Northwest Africa 7877 (NWA 7877)

(Northwest Africa)

Purchased: 2012 Dec

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by F. Kuntz in December 2012 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Fresh fragmental breccia. Petrographic examination shows abundant mineral debris with sparse clasts of basaltic, quenched, and gabbroic eucritic lithologies. Section also contains minor amounts (approximately 7 vol.% based on BSE image analysis) of diogenitic orthopyroxene. Other minerals are calcic plagioclase, pigeonite (some with fine augite exsolution lamellae), ilmenite, Ti-chromite, troilite, fayalite, Ni-poor metal and rare, irregular grains of Ni-poor kamacite.

Geochemistry: Diogenitic orthopyroxene (Fs24.6Wo2.0; FeO/MnO = 32), pigeonite (Fs36.8Wo6.2; FeO/MnO = 30), clinopyroxene lamella in exsolved pigeonite (Fs29.3Wo42.3; FeO/MnO = 35).

Classification: Eucrite (polymict breccia).

Specimens: Type specimen plus one polished thick section on deposit with PSF; main mass with Kuntz.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2012 Dec
Mass (g):104
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):24.6; 36.8; 29.3
Wollastonite (mol%):2.0; 6.2; 42.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.58
Type spec location:PSF
Main mass:F. Kuntz
Comments:K 193; submitted by P. Sipiera
   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)
Kuntz: Fabien Kuntz, France; Website (private address)
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Jean-Michel Masson   
John A. Shea   
Michael S. Scherman   

     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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