Annotated record and chemical composition of iron-manganese nodules from the ...

Iron-manganese concretions, closely related to lacustrine ores and deep sea manganese nodules, are presently forming in different parts of Gulfs of Bothnia and Finland. They can...铁锰结核（Iron-manganese concretions）与湖相矿石（lacustrine ores）及深海锰结核（deep sea manganese nodules）密切相关，目前正在波的尼亚湾与芬兰湾的多处区域形成。它们可……