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Northwest Africa 7896
Basic information Name: Northwest Africa 7896
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7896
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 106 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 429 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 25 Jun 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7896 (NWA 7896)

Morocco

Purchased: 2012 Aug 19

Classification: HED achondrite (Diogenite)

History: The stone was bought in Erfoud, Morocco, in August 2012.

Physical characteristics: A single stone partially covered with fusion crust. Cut surfaces reveal a brecciated texture, with a range of clast sizes (from mm to cm) and colors (white, brownish, black) set in a light gray matrix.

Petrography: (J. Gattacceca, CEREGE) Breccia composed of rock and mineral fragments to cm in a clastic matrix. Some basaltic eucrite clasts, with modal abundance < 10 %. Main minerals are orthopyroxene, plagioclase, chromite. Rare metal.

Geochemistry: Orthopyroxene Fs23.6-32.1, Wo2.0-3.1, FeO/MnO= 31.6. Plagioclase An89.7Ab9.8Or0.4. Chromite Cr/(Cr+Al)=0.80. Magnetic susceptibility log χ = 3.01. Basaltic eucrite clast OPX Fs41.7Wo1.6 (FeO/MnO=33).

Classification: HED achondrite (diogenite, polymict breccia). Moderate weathering.

Specimens: 20 g and a polished section at CEREGE. Main mass with P. Thomas.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2012 Aug 19
Mass (g):106
Pieces:1
Class:Diogenite
Weathering grade:moderate
Ferrosilite (mol%):23.6-32.1
Wollastonite (mol%):2.0-3.1
Magnetic suscept.:3.01
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):20
Type spec location:CEREGE
Main mass:P. Thomas
Comments:Submitted by J. Gattacceca
Institutions
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dominik Stoeckli   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1402 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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