Abstract More than 250 magnetic spherules 40–200 µm in size were mechanically separated from a ferromanganese crust sample of Fedorov Guyot in the Magellan Seamounts. The composition of the spherules corresponds to stony-iron and iron (with a nickel admixture) meteorites oxidized to varying degrees. The surface morphology and the internal texture of these spherules are similar to modern micrometeorites. Some spherules have a zonal structure with a core consisting of unoxidized nickel iron, with a nickel content of 7.5%–53% and a cobalt admixture up to 3.7%. Microinclusions (up to 0.5 μm) of rhodium platinum were found for the first time in a spherule consisting of wüstite and magnetite in the ferromanganese crust. The presence of cosmogenic spherules in the sample studied indicates the accumulation of a certain fraction of platinoids in the ferromanganese crusts due to the burial of cosmic dust in them.

中文翻译：

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在锰铁地壳的宇宙成因球粒中首次发现铂（Fedorov Guyot，麦哲伦海山，太平洋）

摘要 从麦哲伦海山的 Fedorov Guyot 铁锰地壳样品中机械分离出 250 多个大小为 40-200 µm 的磁球。球粒的组成对应于不同程度氧化的石铁和铁（含镍混合物）陨石。这些小球的表面形态和内部结构类似于现代微陨石。一些球粒具有带状结构，其核心由未氧化的镍铁组成，镍含量为 7.5%–53%，钴混合物高达 3.7%。首次在锰铁壳中由方铁矿和磁铁矿组成的球粒中发现了铑铂的微包裹体（最大 0.5 μm）。