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Northwest Africa 12219 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12219 This is an OFFICIAL meteorite name. Abbreviation: NWA 12219 Observed fall: No Year found: 2007 Country: (Northwest Africa) Mass: 129 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 651 approved meteorites (plus 1 unapproved name) classified as CO3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 12 Nov 2018 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 12219 (NWA 12219) (Northwest Africa) Purchased: 2007 Jun Classification: Carbonaceous chondrite (CO3) History: Purchased from a Moroccan dealer at the meteorite show in Ensisheim, France Petrography: (K. Metzler, IfP) Chondrules, chondrule fragments, and CAIs are embedded in a fine-grained brownish matrix (about 20 vol% matrix). The vast majority of chondrules are type I chondrules. Apparent chondrule sizes mostly between 50 and 300 µm. Geochemistry: Mineral compositions and geochemistry: Random measurements of olivine grains revealed Fa21.5±14.3 (2.5-48.3); n=23. Random measurements of low-Ca pyroxene grains revealed Fs3.6±3.0Wo1.9±1.1 (Fs1.0-13.9Wo0.3-4.4); n=24 Classification: CO chondrite based on CAI occurrence, small chondrule size, chondrule-matrix ratio, and mineral chemistry. Petrologic type 3 based on the chemical variation of olivine and pyroxene. Low petrologic subtype (<3.5) based on the PMD of Fa values (67). | ||||||||||||||||||||||||||||||
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: |
This lists the most popular meteorites among people who looked up this meteorite.
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Revision history: |
This lists important revisions made to data for this record.
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