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Northwest Africa 12225 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12225 This is an OFFICIAL meteorite name. Abbreviation: NWA 12225 Observed fall: No Year found: 2007 Country: (Northwest Africa) Mass: 169 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 406 approved meteorites classified as Eucrite-pmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 13 Nov 2018 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 12225 (NWA 12225) (Northwest Africa) Purchased: 2007 Jun Classification: HED achondrite (Eucrite, polymict) History: Purchased from a Moroccan dealer at the mineral show in Sainte-Marie-aux-Mines, France Petrography: (K. Metzler, IfP) Polymict breccia consisting of gabbroic and basaltic rock fragments and related debris. Partly brown appearance due to oxidized Ni-free metal. This breccia contains clast-rich impact melt rocks. Accessories are ilmenite, chromium spinel, silica polymorph, and traces of merrilite and zircon. Geochemistry: Mineral compositions and geochemistry: Basalt clast #1: Pyroxene (n=10): Fs26.7±0.9Wo43.0±0.6 (Fs25.4-28.4Wo42.0-43.9); mean Fe/Mn (at.): 29. Plagioclase (n=10): An74.5±3.9 (An71.2-82.4). Basalt clast #2: Pyroxene (n=10): Fs56.0±0.5Wo5.2±1.1 (Fs55.1-56.6Wo3.7-8.0); mean Fe/Mn (at.): 26. Plagioclase (n=10): An87.3±3.5 (An82.6-92.4). | ||||||||||||||||||||||||||||
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 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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