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| Northwest Africa 13091 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 13091 This is an OFFICIAL meteorite name. Abbreviation: NWA 13091 Observed fall: No Year found: 2014 Country: Morocco Mass:  133.9 g | ||||||||||||||||||||||||||||||
| 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 18 Jan 2020 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 109:
Northwest Africa 13091 (NWA 13091) Morocco Purchased: 2014 Feb Classification: Ordinary chondrite (L6) History: Purchased from a Moroccan dealer in 2013 Physical characteristics: Single stone, Rusty exterior with small patches of fusion crust covering <5%. Saw cut reveals vague outlines of chondrules, some shock melt veins, small flakes of metal and troilite Petrography: (T. Swindle, UAz) Microprobe examination of a polished mount shows some largely re-crystalized chondrules up to 2 mm in size, in a recrystalized matrix. Plagioclase grains in matrix up to 70 μm in size. Incipient oxidation of troilite, approximately 50% of kamacite weathered. Sample cut by many small iron-oxide weathering veins, and occasional melt veins a few tens of μm in width. Minor chromite present. Some areas with abundant metal blebs. Geochemistry: Mineral composition and geochemistry (T. Swindle, UAz): Olivine Fa25.3±0.7, Fe/Mn = 46.8±3.3, n=8; low-Ca pyroxene Fs21.1±0.2Wo1.6±0.2, Fe/Mn=27.6±0.7, n=8 Classification: Ordinary Chondrite (L6), Weathering grade W2, weakly shocked (S3) Specimens: 43.7 g and epoxy mount deposit at UAz. Fredric Stephan holds the main mass. | ||||||||||||||||||||||||||||||
| Data from: MB109 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. 109, in preparation (2020)
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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: |
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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