Инд. авторы:	Agafonov L.V., Popov V.A., Anoshin G.N., Pospelova L.N., Zabelin V.I., Kudryavtsev V.I.
Заглавие:	The Cheder iron meteorite (Tuva): Mineral composition, structure, and PGE and REE contents
Библ. ссылка:	Agafonov L.V., Popov V.A., Anoshin G.N., Pospelova L.N., Zabelin V.I., Kudryavtsev V.I. The Cheder iron meteorite (Tuva): Mineral composition, structure, and PGE and REE contents // Russian Geology and Geophysics. - 2011. - Vol.52. - Iss. 6. - P.620-630. - ISSN 1068-7971. - EISSN 1878-030X.
Внешние системы:	DOI: 10.1016/j.rgg.2011.05.005; SCOPUS: 2-s2.0-79956263799;
Реферат:	eng: The Cheder meteorite, found 23 km south of Kyzyl, has been studied in terms of mineral composition and internal structure. Structurally, it is a medium octahedrite, which measures 26 × 9 × 8 cm and weighs 5.39 kg. Its surface is streamlined and features flow lines. One of the sides, probably that facing the flight direction, features regmaglypts and a sinuous cavern (9 × 1.5 cm). The meteorite consists of kamacite admixed with taenite. The inside of Widmanstätten bands is of complex kamacite-taenite composition and flanked by taenite lamellae. Phosphides are present in kamacite in small amounts as variously sized and shaped bodies. They are divided into three types depending on the Ni/Fe ratio. Small shapeless wormlike grains, which are usually assigned to rhabdites, consist of nickelphosphide (Ni-rich variety). All the minerals in the meteorite contain Co (up to 0.67 wt.%) and, sometimes, Cu and P (just above the detection limit). The total PGE content of the meteorite is several times higher than that of chromitites, which are one of the terrestrial PGE sources. The REE in the meteorite are dominated by HREE. The total REE content of the meteorite is lower than that of chondrite C1 by two orders of magnitude. © 2011.
Ключевые слова:	rare earth element; platinum group element; iron meteorite; grain size; chemical composition; taenite; Regmaglypt; Plessite; Meteorite; Kamacite; Taenite;
Издано:	2011
Физ. характеристика:	с.620-630