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Northwest Africa 15451 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15451 This is an OFFICIAL meteorite name. Abbreviation: NWA 15451 Observed fall: No Year found: 2021 Country: (Northwest Africa) Mass: 50 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 651 approved meteorites (plus 1 unapproved name) classified as CO3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 4 Dec 2022 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 111:
Northwest Africa 15451 (NWA 15451) (Northwest Africa) Purchased: 2021 Classification: Carbonaceous chondrite (CO3) History: Adrián Contreras Gómez (CRATER meteorites) purchased 4 samples with a weight of 50 g in 2021 from a meteorite dealer from the Sahara. Physical characteristics: Sample is dark colored and has a tabular shape. 20% of the sample is covered by a weathered fusion crust. The cut face shows abundent chondrules, inclusions and weathered metal. Petrography: Description and classification (A. Love, App) Sample has a chondritic texture composed of small chondrules (average apparent diameter 227 μm, n=47) and refractory inclusions set within a fine-grained, opaque matrix with 3.5 vol% oxidized Fe metal. Additional minerals are: chromite, rutile, phosphates, troilite, pentlandite and spinel. Geochemistry: (A. Love, App) Olivine Fa20.7±19.5 (Fa0.8-58.6, Cr2O3 in ferroan olivines 0.4±0.1, Fe/Mn=59.6±51.7, n=14); low Ca-pyroxene Fs6.2±15.2Wo1.5±1.0 (Fs1.1-51.9Wo0.7-3.3, Fe/Mn=19.8±36.6 n=11). Classification: Carbonaceous chondrite (CO3, C-S1, moderate weathering). Based on chondrule diameters, presence of CAIs and altered metal, mineral compositions and high magnetic susceptibility, sample is a CO3. Based on mean and Cr2O3 of ferroan olivine chondrules (0.4±0.14), subtype falls between Y81020 and Acfer 094. Specimens: Adrián Contreras Gómez (CRATER meteorites) holds the main masses. A polished thin section and a fragment weighing 10.11 g are on deposit at App. | ||||||||||||||||||||||||||||||
Data from: MB111 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) |
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Catalogs: |
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References: | Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||||
Crosslinks: |
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Revision history: |
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