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| Northwest Africa 14052 | |||||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 14052 This is an OFFICIAL meteorite name. Abbreviation: NWA 14052 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass:  8.8 g | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 31 approved meteorites classified as C3-ung. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), and Ungrouped chondrites | ||||||||||||||||||||||||||||||||
| Comments: | Approved 6 Jul 2021 | ||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 110:
Northwest Africa 14052 (NWA 14052) (Northwest Africa) Purchased: 2020 Classification: Carbonaceous chondrite (C3, ungrouped) History: Bought in Morocco Physical characteristics: One crusted stone. Cut face reveals a dark interior with small chondrules. Petrography: (J. Gattacceca, CEREGE) Chondrules (average apparent diameter 240±200 µm, n=31) and chondrule fragments set in an abundant fine-grained, iron-rich matrix (75 vol% by point counting, n=240). Opaque minerals are metal (as small spheres in the silicates) and troilite. No CAIs were observed. Geochemistry: Olivine Fa14.0±16.2, range Fa1.0-42.4 (n=8). Cr2O3 in ferroan olivine 0.49±0.10 (n=7). Low-Ca pyroxene Fs1.8Wo1.0 (n=1). Defocused matrix analyses FeO = 36.3±2.4 wt%, analytical total 94.5±1.1 wt% (n=4). XRD of a powdered sample (D. Borschnek, CEREGE) does not reveal the presence of hydrous phases (serpentine, tochilinite) typically observed in type 2 chondrites using the same experimental setup. Oxygen isotopic composition (J. Gattacceca, C. Sonzogni, CEREGE) from analysis of one acid-washed 1.5 mg aliquot of a powdered 119 mg bulk sample is δ17O=-3.30‰, δ18O=2.739‰ , Δ17O=-4.724‰ (slope 0.52, analytical uncertainties 0.08‰, 0.12‰, 0.03‰ respectively), Classification: Carbonaceous chondrite (C3-ung). Carbonaceous chondrite based on petrography and oxygen isotopes. Type 3 based on the unequilibrated silicates and absence of phyllosilicates. The absence of phyllosilicates and the oxygen isotopic composition distinguish this meteorite from CM2 chondrites. The high matrix abundance and chondrule size distinguish it from CO3 chondrites. Specimens: Type specimen at CEREGE. Main mass with Labenne. | ||||||||||||||||||||||||||||||||
| Data from: MB110 Table 0 Line 0: |
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| Plots: | O isotopes: | ||||||||||||||||||||||||||||||||
| 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) Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012) |
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| Catalogs: |
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| References: | Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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| Photos: |
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| Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||||
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| Revision history: |
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