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Northwest Africa 12847 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12847 This is an OFFICIAL meteorite name. Abbreviation: NWA 12847 Observed fall: No Year found: 2017 Country: (Northwest Africa) Mass: 15 g | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 467 approved meteorites (plus 2 unapproved names) classified as CV3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites | ||||||||||||||||||||||||||||||||
Comments: | Approved 29 Nov 2019 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12847 (NWA 12847) (Northwest Africa) Purchased: Mar 2017 Classification: Carbonaceous chondrite (CV3) History: Collected by nomads in Western Sahara and purchased by Romano Serra at the Bologna Mineral Show in 2017 from a Moroccan dealer. Physical characteristics: A single small piece without fusion crust. CAIs are visible on the cut surface. Petrography: (V. Moggi Cecchi, G. Pratesi, UniFi); The thin section displays a chondritic texture, with PO, POP and BO chondrules ranging from 750 to 1300 μm in a fine grained matrix. PO and POP chondrules display zoned, Mg-rich olivine crystals and elongated pyroxene grains. Orthopyroxene in chondrules is rather homogeneous. Iron oxides are prevailing among opaque phases; Fe-Ni alloys and troilite can alse be observed as individual grains in the matrix or rimming chondrules. Geochemistry: EMP (V. Moggi Cecchi, G. Pratesi, UniFi); Olivine in PO chondrules cores (Fa1.1±1.0Fo98.9±1.0; Fe/Mn = 6.8, n=12 ); Olivine in matrix (Fa32.5±3.4Fo68.5±3.4; Fe/Mn = 63.5, n=11 ); Orthopyroxene in chondrules and in matrix (Fs1.1±0.1En97.5±0.6Wo1.4±0.2, Fe/Mn = 18.6, n=11). Classification: Carbonaceous Chondrite (CV3); S1; W2 Specimens: A total of 3.2 g specimen is on deposit at MSN-FI. OAM holds the main mass. | ||||||||||||||||||||||||||||||||
Data from: MB108 Table 0 Line 0: |
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Institutions and collections |
OAM: Museo del Cielo e della Terra
Vicolo Baciadonne 1
40017 San Giovanni in Persiceto ( BO)
Italy
Osservatorio Astronomico e Museo "Giorgio Abetti", San Giovanni Persiceto, Bologna, Italy; Website (institutional address; updated 31 Oct 2012) 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. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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