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Northwest Africa 6713
Basic information Name: Northwest Africa 6713
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6713
Observed fall: No
Year found: 2010
Country: Morocco
Mass:help 277 g
Meteoritical Bulletin:  MB 99  (2011)  Mesosiderite
Recommended:  Mesosiderite    [explanation]

This is 1 of 273 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 12 May 2011
Writeup from MB 99:

Northwest Africa 6713 (NWA 6713)


Found: 2010

Classification: Mesosiderite

History: Single stone bought in October 2010. The stone was found the same year, close to Beni Taijjite, Morocco.

Physical characteristics: Single 277 g fusion crusted stone.

Petrography: (J. Gattacceca, CEREGE): Texture is equilibrated. Silicates are orthopyroxene and plagioclase. No olivine. Large orthopyroxene crystals (to 5 mm). A large (>2 cm) orthopyroxenite clast is present. Metal and sulfides grains typically 200 μm to 1 mm. Modal abundances: silicates 80% (pyroxene 78%, plagioclase 2%), metal (kamacite and rare taenite) 10%, troilite 3%, weathering products 5%. Merrillite and chromite present. Copper grains to 80 μm associated with metal and sulfides. Weathering is moderate (~25 vol% of metal and sulfides have been oxidized). Magnetic susceptibility log χ = 5.65 (χ in 10-9 m3/kg).

Geochemistry: (J. Gattacceca, CEREGE) Orthopyroxene Fs24.8±0.3Wo2.3±0.4 (n=8). Plagioclase An92.4Ab1.5Or0.1 (n=5). Kamacite Ni=5.2 wt%, taenite Ni=36.7 wt%. Chromite Cr/(Cr+Al)=0.84. The orthopyroxenite clast (Fs17.2±0.4Wo1.7±0.1) is not equilibrated with the orthopyroxenes in the bulk of the meteorite, but its oxygen isotopic composition (δ17O = 1.82, δ18O = 3.90, and Δ17O = -0.21 (all per mil), J. Gattacceca, C. Sonzogni, CEREGE) is within the mesosiderite range.

Classification: (J. Gattacceca, CEREGE) Mesosiderite (type 3C).

Specimens: A total of 25 g and one polished section are on deposit at CEREGE. P. Thomas holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Mass (g):277
Magnetic suscept.:5.65
Classifier:J. Gattacceca
Type spec mass (g):25.3
Type spec location:CEREGE
Main mass:P. Thomas
Comments:Submitted by J. Gattacceca
Plots: O isotopes:  
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 10 Jun 2023)
References: Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
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     This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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