The black deposits produced in the system were mainly composed of ironsulphide and iron oxide.
系统产生的黑色沉淀物主要由硫化铁和氧化铁构成；
2
It is noteworthy that the major composition of ironsulphide in coastal mangrove sediments is pyrite and mostly in the form of pyrite framboids.
红树林泥炭沉积物中铁的硫化物主要以黄铁矿形式产出，且以莓球状形态为主。
3
Both the occurrence of authigenic ironsulphide and quick decrease of magnetic parameters at the surface clearly show that sediments from Core CSH1 have undergone early diagenesis.