Abstract

Data on the concentration of rare and rare-earth elements in the Devonian manganese-rich metasediments of the Polar Urals and Pai-Khoi Ridge are presented. It is shown that Sc, V, Rb, Zr, Nb, Hf, Th, and U represent elements delivered to the metalliferous sediments as a part of the detrital material. Excess (relative to the background detrital material) concentrations are established for Li, Be, Cr, Co, Ni, Zn, Ge, As, Mo, Sb, W, and Pb. They could be delivered from a specific detrital or chemical material (for example, ferruginous), seawaters (hydrogenic sorption of elements), biogenic substance (carbonate, siliceous, phosphate, carbonaceous), diagenetic interstitial pore waters, and hydrothermal solutions. In terms of the concentration of rare-earth elements, the studied rocks are comparable to the present-day diagenetic ferromanganese deposits.

中文翻译：

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极地乌拉尔和拜县科伊含锰沉积物中稀有稀土元素的地球化学

摘要

给出了极地乌拉尔和拜县科伊脊上泥盆纪富锰元素沉积物中稀土和稀土元素浓度的数据。结果表明，Sc，V，Rb，Zr，Nb，Hf，Th和U表示作为碎屑物质一部分传递到含金属沉积物中的元素。确定了Li，Be，Cr，Co，Ni，Zn，Ge，As，Mo，Sb，W和Pb的过量（相对于本底碎屑物质）浓度。它们可以从特定的碎屑或化学物质（例如铁质），海水（元素的水合吸附），生物物质（碳酸盐，硅质，磷酸盐，碳质），成岩间隙孔隙水和热液中释放。就稀土元素的浓度而言，研究的岩石可与当今的成岩铁锰矿床相提并论。