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| Northwest Africa 14499 | |||||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 14499 This is an OFFICIAL meteorite name. Abbreviation: NWA 14499 Observed fall: No Year found: 2021 Country: (Northwest Africa) Mass:  243 g | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 185 approved meteorites classified as CR2. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites | ||||||||||||||||||||||||||||||||
| Comments: | Approved 19 Mar 2022 | ||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 111:
Northwest Africa 14499 (NWA 14499) (Northwest Africa) Purchased: 2021 Mar Classification: Carbonaceous chondrite (CR2) Physical characteristics: Cut face reveals a brown interior, with large chondrules, and a few mm-sized metal blebs. Petrography: (T. Prestgard, IPAG; J. Gattacceca, CEREGE) Chondrite with large chondrules (average apparent diameter 1055±415 µm, n= 30), often decorated by metal blebs. Metal is also present as large individual grains, some up to ~1 mm, and as smaller (<50 µm) grains inside chondrules and in the matrix. The matrix is fine-grained, with an abundance of 44% from point counting (n=527). Rare sulfides are observed in the matrix. Terrestrial weathering is strong. IR spectra of the matrix (T. Prestgard, IPAG) show the presence of hydrated silicates, notably phyllosilicates. The intensity of aqueous alteration is likely lower than that of Renazzo, based on IR spectra of bulk and matrix material. Geochemistry: Olivine Fa1.6±0.5 (n=5). Low-Ca pyroxene Fs2.4Wo0.7 (n=1). Defocused matrix FeO33.1 wt%, analytical total 82.1 wt%. Classification: Carbonaceous chondite (CR2). Specimens: Type specimen at CEREGE. Main mass with Kuntz. | ||||||||||||||||||||||||||||||||
| Data from: MB111 Table 0 Line 0: |
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| Institutions and collections |
CEREGE: CEREGE
BP 80
Avenue Philibert, Technopole de l'Arbois
13545 Aix-en-Provence Cedex 4
France, France (institutional address; updated 10 Jun 2023) Kuntz: Fabien Kuntz, France; Website (private address) IPAG: Institut de Planétologie et d’Astrophysique de Grenoble 414, Rue de la Piscine Domaine Universitaire 38400 St-Martin d’Hères , France (institutional address; updated 1 Aug 2013) |
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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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| Photos: |
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| Geography: |
Statistics: This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names) | ||||||||||||||||||||||||||||||||