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| Northwest Africa 13643 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 13643 This is an OFFICIAL meteorite name. Abbreviation: NWA 13643 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass:  170 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 641 approved meteorites classified as CM2. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites | ||||||||||||||||||||||||||||||
| Comments: | Approved 16 Jan 2021 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 110:
Northwest Africa 13643 (NWA 13643) (Northwest Africa) Purchased: 2020 Classification: Carbonaceous chondrite (CM2) History: The meteorite was purchased from a dealer in Morocco. Physical characteristics: Many small dark grayish to black individuals without fusion crust. Petrography: Brecciated carbonaceous chondrite composed of small (apparent mean diameter about 250 μm) chondrules, chondrule pseudomorphs, mineral fragments, and rare CAIs many of which surrounded by fine-grained dust rims set into abundant fine-grained matrix. Matrix is Fe-rich with abundant Fe-sulfides and rare Ca-carbonates. Low analytical totals of matrix analyses suggest the presence of hydrous phyllosilicates. Geochemistry: Matrix analyses yield an average total of 78.4±1.4 wt% (5 µm defocused beam, N=10) suggesting the presence of hydrous minerals. | ||||||||||||||||||||||||||||||
| Data from: MB110 Table 0 Line 0: |
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| Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) |
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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 9921 approved meteorites from (Northwest Africa) (plus 1838 unapproved names) | ||||||||||||||||||||||||||||||