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Northwest Africa 13686 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13686 This is an OFFICIAL meteorite name. Abbreviation: NWA 13686 Observed fall: No Year found: 2020 Country: Mauritania Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 39 approved meteorites classified as R5. [show all] Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 28 Mar 2021 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 110:
Northwest Africa 13686 (NWA 13686) Mauritania Purchased: 2020 Classification: Rumuruti chondrite (R5) History: Carlos Muñecas purchased the 341 g sample from a dealer in Mauritania. Physical characteristics: Sample is partially coated with a dark contraction-cracked fusion crust. The cut face shows the interior is a breccia composed of light grey irregular-shaped recrystallized clasts and dark-gray host with visible chondrules and fine-grained dispersed sulfides. Petrography: Description and classification (A. Love, App) Sample is a breccia composed of recrystallized chondritic clasts surrounded by a brecciated host of similar materials. Sulfides within recrystallized clasts are coarsely crystalline, while sulfides within host are finely disseminated. Average apparent diameter of chondrules is 411 µm, n=58. Plagioclase occurs in distinct isolated intergrowths. Additional minerals are: Ti-bearing chromite, abundant pentlandite, FeS and apatite. Geochemistry: Olivine (Fa39.1±0.3, Fe/Mn=70.5±2.8, n=20); low Ca pyroxene (Fs31.1±0.3Wo1.7±0.7, Fe/Mn=47.4±1.9, n=9); high Ca pyroxene (Fs12.4±0.5Wo43.0±1.1, Fe/Mn=42.9±3.5, n=10). Classification: Rumuruti chondrite (R5 breccia, C-S3, wi-0) Based on ubiquitous sulfides and equilibrated compositions of olivine and pyroxene, sample is an R5 breccia. Specimens: Carlos Muñecas holds the main mass. Two slices weighing 20.08 g and a polished thin section are on deposit at App. | ||||||||||||||||||||||||||||||
Data from: MB110 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., 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 195 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters) |