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Northwest Africa 7651
Basic information Name: Northwest Africa 7651
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7651
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 2.48 kg
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite-cm
Recommended:  Eucrite-cm    [explanation]

This is 1 of 44 approved meteorites classified as Eucrite-cm.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 5 Feb 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7651 (NWA 7651)

Morocco

Purchased: 2012

Classification: HED achondrite (Eucrite, cumulate)

History: Acquired by Adam Bates and Aziz Habibi in Morocco, 2012.

Physical characteristics: Three matching stones, the largest 1100 g, with shiny black fusion crust. Saw cut reveals a mosaic of mm-size, white plagioclase and green-brown pyroxene crystals.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows texturally equilibrated gabbro with approximately equal percentages of plagioclase and pyroxene; pyroxene has exsolution lamellae, many triple-junction grain boundaries, also some pyroxene and plagioclase poikiloblasts. Ubiquitous silica, chromite, and ilmenite.

Geochemistry: (C. Agee and M. Spilde, UNM) EMPA. Pyroxene Fs45.2±13.2Wo20.2±16.5, Fe/Mn=32±1, n=20; plagioclase Or0.6±0.1Ab10.2±0.6An89.1±0.6, n=4.

Classification: (Eucrite-cm). Gabbro, highly equilibrated both texturally and compositionally, similar in texture to Moore County, however significantly higher pyroxene Fs-content than typical eucrite-cm, hence anomalous.

Specimens: 21 g including a probe mount on deposit at UNM, Adam Bates holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2012
Mass (g):2480
Pieces:3
Class:Eucrite-cm
Ferrosilite (mol%):45.2±13.2
Wollastonite (mol%):20.2±16.5
Classifier:C. Agee, UNM
Type spec mass (g):21
Type spec location:UNM
Main mass:Adam Bates
Comments:Submitted by C. Agee
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Gabriel Gonçalves Silva   
John A. Shea   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1370 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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