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Northwest Africa 15438 | |||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15438 This is an OFFICIAL meteorite name. Abbreviation: NWA 15438 Observed fall: No Year found: 2021 Country: Algeria Mass: 969 g | ||||||||||||||||||||||||||
Classification history: |
This is 1 of 603 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||
Comments: | Approved 11 Dec 2022 | ||||||||||||||||||||||||||
Writeup |
Writeup from MB 111:
Northwest Africa 15438 (NWA 15438) Algeria Find: 2021 Classification: HED achondrite (Eucrite) History: Found in 2021 in Algeria, later purchased in September 2021 by Chris Monk from Younes Chaoui. Physical characteristics: Many stones with dark-brown fusion crust. Petrography: (D. Sheikh, Cascadia) Specimen is comprised of mm-sized sub-angular lithic clasts (primarily diabasic and gabbroic clasts, some containing exsolved augite) and monomineralic clasts set within a fine-grained matrix containing accessory Cr-spinel, ilmenite, and SiO2-rich glass. Geochemistry: Low-Ca Pyroxene (Fs60.9±2.7Wo3.8±0.4, range Fs58.9-62.8Wo3.5-4.1, Fe/Mn=30±1, n=2), Pigeonite (Fs55.2±1.3Wo8.0±1.4, range Fs53.7-57.4Wo5.6-9.6, Fe/Mn=30±1, n=12), High-Ca Pyroxene (Fs31.0±0.9Wo37.4±0.9, range Fs29.5-32.4Wo35.6-38.8, Fe/Mn=30±2, n=11), Calcic Plagioclase (An89.2±2.3, range An83.8-93.0, n=16). Classification: Achondrite (Eucrite). Specimens: 20.3 grams at Cascadia, main mass with Chris Monk. | ||||||||||||||||||||||||||
Data from: MB111 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. 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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Geography: |
Statistics: This is 1 of 1358 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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