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Northwest Africa 13197 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13197 This is an OFFICIAL meteorite name. Abbreviation: NWA 13197 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass: 679 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 11505 approved meteorites (plus 23 unapproved names) classified as H5. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 16 Feb 2020 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13197 (NWA 13197) (Northwest Africa) Purchased: 2019 Mar Classification: Ordinary chondrite (H5) History: Purchased from a dealer in Morocco in March 2019. Physical characteristics: Physical Characteristics: the 4 stone pieces of the repository specimen are rounded with rugged surfaces and lack of fusion crust. The stones have a dark reddish color with light grey chondrules clasts, showing a dark colored matrix and oxidized metal. Petrography: (N. Ma, UBT) Individual chondrules vary from 0.1 to 2 mm but most chondrules are 0.3-0.7 mm in diameter. Various groups of chondrules (75 area%) are present with PO, GOP and C types as the most abundant. The shape of chondrules remains for most of them sharp against the matrix. Matrix is recrystalized to few-micrometer sized crystals with dispersed oxidized metallic veins under reflected light and in BSE images. Metal (~5%) is only oxidized around the rims, but oxidized veins from terrestrial weathering are found penetrating into the matrix and chondrules. Geochemistry: Mineral compositions and geochemistry: Olivine (Fa18.0±0.2; Fe/Mn35±4; n=31), Orthopyroxene (Fs15±1Wo4±1, n=3). Classification: Ordinary Chondrite (H5, W2, S2). Specimens: 64.3 g including a thin section on deposit at UBayr, S. Tutorow holds the main mass. | ||||||||||||||||||||||||||||||
Data from: MB109 Table 0 Line 0: |
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Institutions and collections |
UBayr: Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany (institutional address; updated 5 Feb 2020) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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