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Northwest Africa 12577 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12577 This is an OFFICIAL meteorite name. Abbreviation: NWA 12577 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 2000 approved meteorites (plus 4 unapproved names) classified as L4. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 12 Apr 2019 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 108:
Northwest Africa 12577 (NWA 12577) (Northwest Africa) Purchased: 2018 Sep Classification: Ordinary chondrite (L4) Petrography: (K. Metzler, IfP) Ordinary chondrite consisting of well-preserved chondrules of all main chondrule types, (mostly oxidized) metal, and small amounts (~10 vol%) of interchondrule matrix. Geochemistry: Mineral compositions and geochemistry: The mean olivine composition is Fa23.0±0.3 (Fa22.1-23.6; n=16). The mean low-Ca pyroxene composition is Fs18.6±3.8Wo1.5±1.1 (Fs12.0-28.5Wo0.5-3.8; n=14). Classification: L chondrite based on olivine chemistry. Petrologic type 4 based on the equilibrated state of olivine and unequilibrated state of low-Ca pyroxene. | ||||||||||||||||||||||||||||||
Data from: MB108 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. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Photos: |
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Geography: |
Statistics: This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |