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Northwest Africa 12721 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12721 This is an OFFICIAL meteorite name. Abbreviation: NWA 12721 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 105 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 470 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 12721 (NWA 12721) Northwest Africa Purchased: March 2018 Classification: Carbonaceous chondrite (CV3) History: Collected by nomads in Western Sahara and purchased by Hichame Mimaghador at Erfoud from a Moroccan dealer. Physical characteristics: A single piece weighing 105 g without fusion crust. CAIs are visible on the hand specimen cut surface. Petrography: (V. Moggi Cecchi, G. Pratesi, UniFi); The thin section displays a chondritic texture, with GO, BO, PO and POP chondrules ranging from 800 to 1200 μm prevailing over matrix; a chondrule-matrix ratio of 1.2 can be estimated; no CAIs are visible in a small thin section; olivine in PO chondrules is Fa-poor and displays a core-rim zoning; olivine in BO chondrules is Fa-rich; orthopyroxene in POP chondrules is Mg-rich; an Al-rich pigeonite and rare augite is present in BO chondrules; matrix is fine-grained and consists of Fa-rich olivine and orthopyroxene with diffuse altered opaque phases (iron-oxides) and magnetite. Geochemistry: EMP (V. Moggi Cecchi, G. Pratesi, UniFi); Olivine in PO chondrules (Fa1.7±0.2Fo98.3±0.7; Fe/Mn = 12.9, n=10 ); Olivine in BO chondrules (Fa29.9±4.2Fo70.1±0.9; Fe/Mn = 94.5, n=6); Orthopyroxene in POP chondrules (Fs3.0±0.8En96.1±0.7Wo0.8±0.1, Fe/Mn = 67.6, n=8); Pigeonite in BO chondrules (Fs2.2±0.2En91.8±2.1Wo6.0±2.1, Fe/Mn = 6.9, n=9), High-Ca pyroxene (Fs25.7±0.2En30.4±0.3Wo43.9±0.4, Fe/Mn = 60.6, n=6); plagioclase in POP chondrules (An97.7Or0.1). Classification: Carbonaceous Chondrite (CV3) Specimens: A total of 25 g specimen is on deposit at MSN-FI. Mimaghador holds the main mass. | ||||||||||||||||||||||||||||||
Data from: MB108 Table 0 Line 0: |
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Institutions and collections |
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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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