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| Northwest Africa 12771 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 12771 This is an OFFICIAL meteorite name. Abbreviation: NWA 12771 Observed fall: No Year found: 2016 Country: Morocco Mass:  4.2 kg | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 12780 approved meteorites (plus 11 unapproved names) classified as L6. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
| Comments: | Approved 27 Jun 2019 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 108:
Northwest Africa 12771 (NWA 12771) Morocco Purchased: Feb 2016 Classification: Ordinary chondrite (L6) History: Purchased from a Moroccan dealer in 2016. Physical characteristics: Physical Characteristics: Single rectangular stone, 4.2 kg, with blocky, iceberg style, orange-brown weathering and black fusion crust with shallow regmaglypts. Saw cut reveals patchy light and dark areas with sparse deformed chondrules. Darker areas cut by 1 mm shock veins and patches, iron oxide staining. Petrography: (K. Domanik and J. Satkoski, UAz) The meteorite is highly recrystallized, especially in light-colored areas. A few remnant, deformed chondrules were observed. Secondary plagioclase grains range up to 200 μm in size. Maskelynite is present in pockets near opaque shock veins. Olivine has well-defined mosaic extinction. No ringwoodite was found in shock veins or pockets. Kamacite, troilite, and chromite are also present. Geochemistry: Mineral compositions and geochemistry: Olivine Fa25.2 ± 1.0, Fe/Mn=48.0 ± 3.4, n=20; low-Ca pyroxene Fs20.9±0.8Wo1.7±0.7, Fe/Mn=30.0 ± 2.5, n=15. Classification: Ordinary Chondrite (L6), Weathering grade W2 Specimens: 20 g including polished thin section on deposit at UAz, J. Satkoski holds the main mass. | ||||||||||||||||||||||||||||||
| Data from: MB108 Table 0 Line 0: |
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| Institutions and collections |
UAz: Lunar and Planetary Laboratory, University of Arizona, 1629 E. University Blvd., Tucson, AZ 85721, United States (institutional address; updated 14 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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Geography:
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Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||
| Also see: |
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| Revision history: |
This lists important revisions made to data for this record.
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