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Northwest Africa 12020 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12020 This is an OFFICIAL meteorite name. Abbreviation: NWA 12020 Observed fall: No Year found: 2017 Country: (Northwest Africa) Mass: 576 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 2923 approved meteorites (plus 2 unapproved names) classified as LL6. [show all] Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 6 Oct 2018 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 12020 (NWA 12020) (Northwest Africa) Purchased: 2017 Dec Classification: Ordinary chondrite (LL6) Petrography: (K. Metzler, IfP) Monomict breccia with recrystallized texture, showing some relict BO chondrules. Most secondary feldspar grains are >50 µm. Melt pockets and melt veins are present. Geochemistry: Mineral compositions and geochemistry: The mean olivine composition is Fa31.3±0.4 (Fa30.7-32.0); n=13. The mean low-Ca pyroxene composition is Fs24.9±0.4Wo1.6±0.1 (Fs24.2-25.6Wo1.3-1.8), n=13. Classification: LL chondrite based on mineral chemistry. Petrologic type 6 based on the equilibrated state of olivine and pyroxene and grain size of secondary plagioclase | ||||||||||||||||||||||||||||||
Data from: MB107 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 Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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