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| Northwest Africa 13996 | |||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 13996 This is an OFFICIAL meteorite name. Abbreviation: NWA 13996 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass:  163 g | ||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 24 approved meteorites classified as EL-melt rock. [show all] Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), Enstatite-rich meteorites, and Melted chondrites | ||||||||||||||||||||||||||||
| Comments: | Approved 17 Jul 2021 | ||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 110:
Northwest Africa 13996 (NWA 13996) (Northwest Africa) Purchased: 2018 Classification: Enstatite chondrite (EL melt rock) History: Purchased in 2018 by Geologist Juan Aviles Poblador from a meteorite dealer in Morocco. Physical characteristics: Single weathered stone with minor fusion crust. Impact melt pockets and vesicles are present in varying abundance between different fragments and slices of the sample. Petrography: (D. Sheikh, Cascadia) This sample exhibits an equigranular texture consisting primarily of recrystallized grains of enstatite (~94 vol.% ,Av. 75±10 µm, n=20), and accessory albitic plagioclase, oldhamite, daubreelite, troilite, silica glass, and sparse grains of kamacite (< 1 vol. %, containing ~1.5 wt.% Si, n=3). A few relict chondrules were observed, most displaying a radial pyroxene texture (Av. 1 mm, up to 3 mm, n=4). Geochemistry: Enstatite (Fs0.1±0.1Wo1.4±0.1, range Fs0.0-0.6Wo1.1-1.6, n=70), Plagioclase (An16.2±0.6 Or3.8±0.4, range An15.5-16.9 Or3.1-4.2, n=8). Classification: Enstatite-melt rock (EL-melt rock). EL due to the amount of Si in kamacite, melt rock due to the overall texture. Specimens: 21.1 g and a thin section at Cascadia; main mass with Juan Aviles Poblador. | ||||||||||||||||||||||||||||
| Data from: MB110 Table 0 Line 0: |
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| Institutions and collections |
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 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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| Geography: |
Statistics: This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||