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Northwest Africa 6677
Basic information Name: Northwest Africa 6677
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6677
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 5.2 kg
Meteoritical Bulletin:  MB 100  (2012)  L4-melt breccia¬†
Recommended:  L4-melt breccia    [explanation]

This is 1 of 8 approved meteorites classified as L4-melt breccia.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 16 Dec 2011
Writeup from MB 100:

Northwest Africa 6677 (NWA 6677)

(Northwest Africa)

Purchased: 2010

Classification: L4-melt breccia

History: Purchased by Giorgio Tomelleri at the Erfoud market, Morocco.

Physical characteristics: A single dark brown 5200 g stone without fusion crust.

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, MSP): The thin section displays a brecciated texture with two lithologies: chondritic and melted. The chondritic portion shows an equilibrated texture consisting of rare chondrules (to 0.7 mm), embedded in a fine-grained recrystallized matrix dominated by olivine, plagioclase and orthopyroxene. Opaque phases are represented by rare metal and troilite grains. The melted portion shows diffuse melt features such as metal veins, micrometer-sized metal grains and glass.

Geochemistry: Olivine (Fa23.8-27.5), orthopyroxene (Fs20.8En77.2Wo2.0, Mg/(Mg+Fe)=0.68).

Classification: Ordinary chondrite (L4-melt breccia); S2, W1.

Specimens: A total of 20.5 g of sample, one polished thin section and a block are on deposit at MSP (MSP 5143).

Data from:
  Table 1
  Line 1473:
Place of purchase:Erfoud
Date:P 2010
Mass (g):5200
Class:L4-melt breccia
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):24.8 (24-28 )
Ferrosilite (mol%):21
Wollastonite (mol%):2.0
Classifier:V. Moggi Cecchi, G. Pratesi, S. Caporali, MSP
Type spec mass (g):20.5
Type spec location:MSP
Main mass:Unknown
Comments:Submitted by Vanni Moggi Cecchi
   and collections
MSP: Museo di Scienze Planetarie, Via Galcianese 20/H, 59100 Prato, Italy, Italy; Website (institutional address; updated 22 Oct 2022)
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Franco Vignato   

     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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