Chemistry of manganese concretions from the White Sea

Fe-Mn aggregates are presented in the paper where flat and round concretions (from several mm to 10-12 cm in diameter) and Fe-Mn crusts on bivalves and polychaete tubes with...本论文展示了铁锰聚集体（Fe-Mn aggregates），其中包含直径为数毫米至10-12厘米的扁平状与球状结核，以及附着于双壳类和带有……的多毛类栖管之上的铁锰结壳（Fe-Mn crusts）。