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Northwest Africa 11706 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11706 This is an OFFICIAL meteorite name. Abbreviation: NWA 11706 Observed fall: No Year found: 2016 Country: Morocco Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 199 approved meteorites classified as CK5. [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![]() |
Writeup from MB 107:
Northwest Africa 11706 (NWA 11706) Morocco Purchased: Sept 2016 Classification: Carbonaceous chondrite (CK5) History: A single stone weighing 116 g was purchased by Hichame Mimaghador at the Erfoud market, Morocco, in 2016. Physical characteristics: A single stone, almost completely covered by a fusion crust with several contraction cracks. Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi): The thin section displays a texture consisting of mm-sized granular olivine-rich chondrules containing magnetite blebs well integrated in a medium grained olivine-rich matrix. A fine grained olivine-augite-plagioclase aggregate 500 × 250 μm wide is visible. Main minerals are olivine, augite, intermediate plagioclase. Opaques are mainly pentlandite and Cr-rich magnetite, with minor altered kamacite. Geochemistry: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi) Olivine (Fa34.7±1.3, Fe/Mn = 142.0±8.1, N = 7), augite (Fs13.5±0.4Wo49.3±1.3, Al2O3 = 1.28 Wt.%, N = 6). Feldspar An55.0Ab43.9Or1.1. Magnetite contains 1.7±0.1 wt.% Cr2O3, 0.26 wt.% Al2O3, 0.23 wt.% NiO (N=3). Oxygen isotopes: (I. Franchi, R. Greenwood, OU) δ17O = -5.76 ‰, δ18O = -1.91 ‰, Δ17O = -4.76 ‰. Classification: Carbonaceous chondrite (CK5). Moderate weathering. Specimens: A total of 19.6 g specimen, a block (0.4 g) and a thin section are on deposit at MSN-Fi. 96 g with Mimaghador. | ||||||||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
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Plots: | O isotopes: | ||||||||||||||||||||||||||||||
Institutions 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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Photos: |
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Geography:![]() |
Statistics: This is 1 of 1932 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater) |