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Northwest Africa 15220 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15220 This is an OFFICIAL meteorite name. Abbreviation: NWA 15220 Observed fall: No Year found: 2022 Country: (Northwest Africa) Mass: 227 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 281 approved meteorites classified as Eucrite-mmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 5 Sep 2022 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 111:
Northwest Africa 15220 (NWA 15220) (Northwest Africa) Purchased: 2022 Classification: HED achondrite (Eucrite, monomict) History: Purchased by S. Crivello and I. Pardini in 2022 from Mirko Graul. Reportedly found in Northwest Africa in July, 2021. Petrography: (K. Metzler, IfP) Monomict breccia, consisting of basaltic lithic clasts with ophitic to subophitic textures and monomineralic fragments (pyroxene, plagioclase) set in a fine-grained matrix of related debris. The matrix partly represents a crystallized shock melt. Most pyroxenes exhibit augite exsolution lamellae. Accessories are a silica polymorph, Cr-spinel, ilmenite, and troilite. Shock veins occur. Geochemistry: Mineral compositions and geochemistry: Low-Ca pyroxene (host): Fs62.5±0.8Wo2.1±0.6 (Fs61.1-63.5Wo1.6-3.7); mean Fe/Mn (at.): 31.5; n=10. Ca-rich pyroxene (exsolution lamellae) Fs27.4±0.5Wo42.8±0.5 (Fs26.8-28.9Wo41.9-43.4); n=10. Plagioclase An88.6±1.7Or0.2±0.4 (An85.1-90.9Or0.0-1.3); n=10. Classification: Brecciated eucrite (monomict), based on texture and mineral chemistry | ||||||||||||||||||||||||||||
Data from: MB111 Table 0 Line 0: |
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Institutions and collections |
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012) |
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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 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names) | ||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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