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Northwest Africa 7678
Basic information Name: Northwest Africa 7678
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7678
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 4.24 kg
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  CV3
Recommended:  CV3    [explanation]

This is 1 of 536 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 1 Mar 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7678 (NWA 7678)

Morocco

Purchased: 2012 Aug

Classification: Carbonaceous chondrite (CV3)

History: Purchased by Adam Bates from a meteorite dealer in Morocco, August 2012.

Physical characteristics: 182 matching individuals/fragments, main mass 581 g. Dark weathered exterior, saw-cut reveals many small chondrules less than 1 mm and a few up to 5 mm, scattered CAIs up to 1 cm, set in a dark gray groundmass.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a numerous AOA, BO, PO, POP, and PP chondrules, most in the size range 300-1000 μm, in very fine-grained matrix. Abundant troilite; nearly all iron metal is oxidized by weathering.

Geochemistry: (C. Agee and M. Spilde, UNM) Chondrule olivine range: Fa0.7-63.1, n=31. Type I chondrules: olivine Fa 3.0±1.9, Fe/Mn=49±31, Cr2O3=0.14±0.09, n=26; low-Ca pyroxene Fs2.0±1.6Wo1.3±0.9, Fe/Mn=25±20, n=23. Type II chondrules: olivine Fa 40.3±26.4, Fe/Mn=133±53, Cr2O3=0.08±0.04, n=5. Fassaite Fs5.1±0.6Wo58.4±1.2, Al2O3=23.69±0.14 wt%, Na2O=2.65±0.00 wt%, n=2.

Classification: Carbonaceous chondrite (CV3)

Specimens: 65 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 Aug
Mass (g):4236
Pieces:182
Class:CV3
Fayalite (mol%):0.7-63.1
Ferrosilite (mol%):2.0±1.6
Wollastonite (mol%):1.3±0.9
Classifier:C. Agee, UNM
Type spec mass (g):65
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:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Denis gourgues   
John A. Shea   
Mirko Graul            
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1488 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater)

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