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Northwest Africa 12819 | |||||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12819 This is an OFFICIAL meteorite name. Abbreviation: NWA 12819 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 1022 g | ||||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 82 approved meteorites classified as CK3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CK chondrites, CK3 chondrites, and CV-CK clan chondrites | ||||||||||||||||||||||||||||||||||
Comments: | Approved 3 Sep 2019 | ||||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12819 (NWA 12819) (Northwest Africa) Purchased: 2018 Classification: Carbonaceous chondrite (CK3) History: Marc Jost purchased this 1022g sample from Mokhtar Aithiba at Munich show 2018. Physical characteristics: The sample has a rounded shape, with numerous chondrules and inclusion are visible on the exterior. The cut face shows the interior has a chondritic texture composed of dispersed chondrules and CAIs, set within a greenish-gray, fine-grained matrix. Petrography: Description and Classification (A. Love, App) Sample is composed of ~39 vol%, 1364 im (avg. dia.) chondrules and CAIs in a matrix composed of olivine, pyroxene, zoned plagioclase and magnetite. BO and POP chondrules are dominant and many contain concentric clastic and igneous rims. Geochemistry: (A. Love, App) Olivine chondrules Fa24.7±9.7 (Fa9.2-33.5), Fe/Mn=121.1±26.2, mean NiO in chondrule rims = 0.3 wt%, N=10; Matrix olivine Fa33.3±0.2, mean NiO =0.4wt%, N=8; low Ca pyroxene Fs10.1±8.3Wo2.0±1.8 (Fs1.8-24.6Wo0.6-4.0), N=7; high-Ca pyroxene Fs8.1±8.3Wo25.3±18.3 (Fs1.5-22.6Wo6.0-51.6), N=5 Plagioclase cores: An87.8±2.3Or0.1±0.1; rims: An30.7±5.3Or2.7±0.6, N=5. Classification: Carbonaceous chondrite (CK3). Based upon chondrule size, oxidized composition of chondrule olivines, and presence Cr-bearing magnetite and NiO content of olivine, this sample is a CK. Based on unequilibrated compositions of olivine and pyroxenes, this sample is a type 3 CK chondrite. CK3 wi-3 C-S3 Specimens: Marc Jost (SJS) holds the main mass. A polished thin section and mount and 3 slices totaling 29.4 g comprise the type specimen which is on deposit at App. | ||||||||||||||||||||||||||||||||||
Data from: MB108 Table 0 Line 0: |
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Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) SJS: Space Jewels Switzerland, 2555 Brügg, Switzerland (private address; updated 3 Jan 2010) |
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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 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||||||||
Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
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Revision history: |
This lists important revisions made to data for this record.
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