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Northwest Africa 10423 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 10423 This is an OFFICIAL meteorite name. Abbreviation: NWA 10423 Observed fall: No Year found: 2015 Country: Morocco Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 55 approved meteorites classified as Eucrite-cm. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 14 Dec 2015 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 104:
Northwest Africa 10423 (NWA 10423) Morocco, (Northwest Africa) Purchased: Feb 2015 Classification: HED achondrite (Eucrite, cumulate) History: A single stone of 21 g was found by nomads in Western Sahara and purchased by Giorgio Tomelleri at the Erfoud market in 2015. Physical characteristics: The main mass has no fusion crust. Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi): A cumulate eucrite mainly consisting of large (120-190 μm in width) orthopyroxene crystals and minor clinopyroxene and anorthitic plagioclase 100-200 μm wide crystals. Orthopyroxene crystals occasionally display very fine to fine augite exsolution lamellae ranging from 2 to 8 μm in width. Minor phases include ilmenite and chromite. Geochemistry: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi) Calcic plagioclase An84.3±1Or0.8±0.1, n=8, low-Ca pyroxene (Fs61.9±1.4En35.6±1.2Wo2.6±0.1; n=6; Fe/Mn=36.76±0.13); pigeonite (Fs52.1±1.4En34.8±1.2Wo13.1±0.8; n=7; Fe/Mn=34.02±0.12); augite exsolution lamellae in low-Ca pyroxene (Fs27.5±1.2,En30.3±1.3Wo42.2±1.8; n=7; Fe/Mn = 32.21±0.11). Oxygen isotopes: (I. Franchi, R. Greenwood, OU) δ17O = 2.23 ‰, δ18O = 4.69 ‰, Δ17O = -0.204 ‰. Classification: Eucrite-cm with low degree of shock and low degree of weathering. Specimens: A total of 4.7 g specimen and one thin section is on deposit at MSN-Fi. Main mass with Giorgio Tomelleri | ||||||||||||||||||||||||||||||
Data from: MB104 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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Photos: |
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Geography:![]() |
Statistics: This is 1 of 2012 approved meteorites from Morocco (plus 35 unapproved names) (plus 1 impact crater) |