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| Northwest Africa 11707 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 11707 This is an OFFICIAL meteorite name. Abbreviation: NWA 11707 Observed fall: No Year found: 2016 Country: Morocco Mass:  453 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 128 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 |
Writeup from MB 107:
Northwest Africa 11707 (NWA 11707) Morocco 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: 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:
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Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||
| Also see: |
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| Revision history: |
This lists important revisions made to data for this record.
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