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| Northwest Africa 2812 | |||||||||||||
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| Basic information | Name: Northwest Africa 2812 This is an OFFICIAL meteorite name. Abbreviation: NWA 2812 Observed fall: No Year found: 2003 Country: Morocco Mass:  355 g | ||||||||||||
| Classification history: |
This is 1 of 14 approved meteorites classified as CR. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites | ||||||||||||
| Writeup |
Writeup from MB 89:
Northwest Africa 2812
Region El Mahabas, S of Zag, Morocco Found 2003 Carbonaceous chondrite (CR) A single stone of 355 g was found by Moroccan nomads and sold in Morocco. Mineralogy and classification (J. Schlüter, Hamburg): Abundant well defined chondrules (n=40: mean 847 μm); coarse grained rims of chondrule minerals; metal-rich porphyritic olivine; amoeboid olivine aggregates. Olivine (n=45; mean Fa9.56; range Fa0.02-24.36; two peaks at Fa0-2 and Fa9-13). Orthopyroxene: (n=5, Fs4.62-9.33Wo0.15-1.21); low-Ca clinopyroxene: (n=6, Fs16.98-35.86Wo1.04-5.66, Cr2O3: 0.24-1.04 wt,%, MnO 0.27-0.76 wt.%). Weathering grade: W3, shock stage: S2. Specimens: type specimen 21.5 g, Mineralogical Museum Hamburg, the main mass is with Horst Burkard, Bonn. | ||||||||||||
| Institutions and collections |
Burkard: Horst Burkard, Bonn, Germany (private address) Horst: Burkard Horst, Germany (private address) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
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Geography:
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Statistics: This is 1 of 2012 approved meteorites from Morocco (plus 35 unapproved names) (plus 1 impact crater) | ||||||||||||