They were probably the first types of deposit ever worked by man. 它們也許是人類(lèi)最早開(kāi)采的礦床類(lèi)型。
Mineralization occurred in the stages of the structural evolution, resulting in the corresponding deposit types. 盆地構造演化的各階段都伴隨著(zhù)特定的成礦作用,形成了相應的礦床類(lèi)型。