湄州湾现代沉积过程

THE PROCESS OF RECENT SEDIMENT IN MEIZHOU BAY, FUJIAN

湄州湾强劲的潮流导致外海泥沙输入,但受一定程度的限制,海湾周围的陆源碎屑成为沉积物质的主要来源。水动力,特别是潮流作用控制现代沉积的格局,潮流冲刷槽为粗粒沉积属海底冲刷产物,两侧的斜坡及潮坪,从湾中央向岸,从粗细混合沉积物过渡为细粒沉积,属淤积产物。

In Meizhou Bay, the strong tidal stream transports its mud and sand from open sea, but is restricted to a certain extent, making the terrigenous clasts of the bay the main source of sediment. The hyclrodynamics, especially the tidal action controls the distribution of the recent sediments. The deep channel and submerged tidal trough covered by the coarse grains belong to sea bottom eroded products. Their both sides-the slope and tidal flat, from centre of the bay to the coast-covered by the mixed deposits of coarse and fine grains transiting to fine deposits, belong to depositing products.