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Northwest Africa 12685 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12685 This is an OFFICIAL meteorite name. Abbreviation: NWA 12685 Observed fall: No Year found: 2017 Country: (Northwest Africa) Mass: 900 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 77 approved meteorites classified as R3. [show all] Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3) | ||||||||||||||||||||||||||||||
Comments: | Approved 27 Jun 2019 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12685 (NWA 12685) (Northwest Africa) Purchased: 2017 Classification: Rumuruti chondrite (R3) History: The meteorite was purchased from a local meteorite dealer in Zagora, Morocco. Physical characteristics: Thirty dark brownish individuals partly covered with fusion crust. Petrography: The meteorite is a breccia with well defined chondrules (apparent mean diamter 400 μm) set into abundant matrix dominated by Fe-rich olivine. Compositionally unequilibrated olivine and pyroxene occur in chondrules and as single mineral fragments. More minor phases include Ca-pyroxene, sodic plagioclase, sulfides, and Ti-bearing chromite; no metal was detected. The meteorite contains recrystallized melt clasts. Geochemistry: olivine: Fa25.7±12.1 (Fa9.1-38.2, n=32); low-Ca pyroxene: Fs17.9±10.5Wo1.0±0.8 (Fs0.5-29.6Wo0.3-3.5, n=21); Ca-pyroxene: Fs11.4±1.0Wo44.2±1.0 (Fs9.7-12.9Wo41.9-45.7, n=11) | ||||||||||||||||||||||||||||||
Data from: MB108 Table 0 Line 0: |
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Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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