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Northwest Africa 12432 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12432 This is an OFFICIAL meteorite name. Abbreviation: NWA 12432 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 11150 approved meteorites (plus 22 unapproved names) classified as H5. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||
Comments: | Approved 23 Jan 2019 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 108:
Northwest Africa 12432 (NWA 12432) (Northwest Africa) Purchased: 12 Dec 2016 Classification: Ordinary chondrite (H5) Physical characteristics: Exterior surfaces are dark brown; interior cut faces are medium-to-dark brown, with numerous lighter brown chondrules visible. Petrography: (M. Hutson, A. Ruzicka, Cascadia) Extensive veins of iron hydroxides cut across the thin section, cross-cutting chondrules and causing the material between chondrules to be opaque in transmitted light. Geochemistry: Mineral compositions and geochemistry: (M. Hutson, R. Kostynick, A. Ruzicka, Cascadia) Olivine (Fa18.3±0.2, N=26; low-Ca pyroxene (Fs16.3±0.2Wo1.3±0.2, N=26). Classification: H5 based on iron contents in olivine and pyroxene. Specimens: Cascadia holds 47.2 g in three pieces, in addition to a polished thin section and a mounted butt. | ||||||||||||||||||||||||||||
Data from: MB108 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 Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Geography: |
Statistics: This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names) |