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Northwest Africa 6687
Basic information Name: Northwest Africa 6687
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6687
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 42.4 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  Lunar (feldsp. breccia) 
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 182 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 16 Dec 2011
Writeuphelp
Writeup from MB 100:

Northwest Africa 6687 (NWA 6687)

(Northwest Africa)

Purchased: 2010

Classification: Lunar meteorite (feldspathic breccia)

History: Found in Morocco in 2010 and purchased from the finder by G. Tomelleri.

Physical characteristics: A single black stone (42.4 g) lacking fusion crust. The interior is dark gray and displays several small white clasts.

Petrography: (V. Moggi Cecchi, S. Caporali, G. Pratesi, MSP) The overall texture consists of coarse-grained inclusions set in a fine-grained matrix. The matrix contains isolated mineral clasts, mainly consisting of augite, plagioclase and olivine, and a fine grained mineral debris enclosed within a dark, partly glassy and vesicular matrix. The large coarse grained inclusions consist of elongated plagioclase and clinopyroxene crystals set in a glassy matrix. Opaque phases are represented by ilmenite, ulvospinel and chromite.

Geochemistry: Olivine (Fa33.7-49.2, Fe/Mn=108, n=20, Cr=1500 ppm, Mn=3100 ppm), augite (Fs23.8.5-31.2En24.9-30.0Wo27.3-30.0 Al-px 13.9-19.5; FeO/MnO mean=65.6; V=400 ppm; Ca=0.61 afu), plagioclase (An83.4Or0.8; K = 0.008 afu); Oxygen isotopes: (I. Franchi, R. Greenwood, OU) δ17O = 3.58, δ18O = 6.84, Δ17O = 0.02 per mil.

Classification: Achondrite (lunar, feldspathic breccia).

Specimens: 9.5 g sample is on deposit at MSP.

Data from:
  MB100
  Table 1
  Line 1483:
Place of purchase:Erfoud
Date:P 2010
Mass (g):42.4
Pieces:2
Class:Lunar (feldsp. breccia)
Fayalite (mol%):38.9 (34-49, n=20)
Ferrosilite (mol%):27.6 (24-31, n=20)
Wollastonite (mol%):29.1 (27-30, n=20)
Classifier:V. Moggi Cecchi, G. Pratesi, S. Caporali, MSP
Type spec mass (g):8.5
Type spec location:MSP
Main mass:Unknown
Comments:Submitted by Vanni Moggi Cecchi
Plots: O isotopes:  
Institutions
   and collections
MSP: Museo di Scienze Planetarie, Via Galcianese 20/H, 59100 Prato, Italy, Italy; Website (institutional address; updated 5 Mar 2014)
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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)
Antonello Petriccione   
Doug R   
Franco Vignato   
Stefano Prosperi   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7009 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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