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Northwest Africa 11707
Basic information Name: Northwest Africa 11707
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11707
Observed fall: No
Year found: 2016
Country: Morocco
Mass:help 453 g
Meteoritical Bulletin:  MB 107  (2018)  CK4
Recommended:  CK4    [explanation]

This is 1 of 119 approved meteorites classified as CK4.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 9 Apr 2018
Writeup from MB 107:

Northwest Africa 11707 (NWA 11707)


Purchased: Feb 2016

Classification: Carbonaceous chondrite (CK4)

History: A single stone weighing 470 g was purchased by Hichame Mimaghador at the Erfoud market, Morocco, in 2016.

Physical characteristics: A single stone covered by fusion crust with contraction cracks.

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi): A texture consisting of well-formed, mm-sized granular chondrules containing magnetite can be observed. Chondrules are surrounded by a medium grained, recrystallized matrix with disseminated opaque phases. Main minerals are olivine, orthopyroxene, augite, albitic plagioclase. Opaque phases are mainly represented by troilite and Cr-rich magnetite, with minor kamacite.

Geochemistry: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi): Olivine (Fa28.0±1.2, Fe/Mn = 93.6±10.1, N = 8), orthopyroxene (Fs23.7±1.0Wo1.7±0.2, Al2O3 = 2.51 Wt.%, N = 4); augite (Fs8.8±1.5Wo44.1±1.8, Al2O3 = 0.51 Wt.%, N = 4). Feldspar An17.2Or5.3. Magnetite contains 2.7±0.1 wt.% Cr2O3, 0.67 wt.% Al2O3, 0.55 wt.% NiO (N=3); Oxygen isotopes: (I. Franchi, R. Greenwood, OU) δ17O = -3.58 ‰, δ18O = 0.93 ‰, Δ17O = -4.06 ‰

Classification: Carbonaceous chondrite (CK4). Moderate weathering.

Specimens: A total of 20.7 g specimen is on deposit at MSN-Fi. The main mass is with owner.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P Feb 2016
Mass (g):453
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):28.0±1.2 (n=15)
Ferrosilite (mol%):23.7±1.0 (n=4)
Wollastonite (mol%):1.7±0.2
Classifier:V. Moggi Cecchi, S. Caporali, G. Pratesi, UniFi
Type spec mass (g):20.1
Type spec location:MSN-FI
Main mass:Mimaghador
Comments:Submitted by Vanni Moggi Cecchi
Plots: O isotopes:  
   and collections
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)
MSN-FI: Museo di Storia Naturale “La Specola”, Sez. Mineralogia – Sistema Museale dell'Università degli Studi di Firenze Via Giorgio La Pira, 4 – 50121 Firenze, Italy; Website (institutional address; updated 24 Oct 2022)
UniFi: Università degli Studi di Firenze, P.zza S. Marco, 4 - 50121 Firenze, Italy (institutional address; updated 14 Sep 2013)
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Hichame Mimaghador   
Public domain photographs:
Vanni Moggi Cecchi   


     This is 1 of 1932 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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