南海北部软泥水化学垂向剖面类型及其形成机制

Chemical types of ooze water in vertical profile and their formation mechanism in the Northern part of South China Sea

本文将南海北部软泥水化学垂向剖面,分为4种类型。剖析了前2种类型在垂向上为开放系统,后2种在垂向上为封闭系统。这些不同类型的软泥水均属软泥阶段的浅变质水。文内提出了全新世期间南海北部海岸线曾南移至距现代海岸线约24km处,比现代海平面下降13m。并发现软泥水比太平洋中部的软泥水的Mn浓度高出1—2个数量级,揭示了利于Mn结核的成矿作用。

In the paper, the ooze water in the northern part of South China Sea is divided chemically in vertical section into four types. The former two types are vertically open system, the latter two types are vertically closed system. The ooze water of these various types belongs to low metamorphic water. The paper suggests that the coastline in the nothern part of South China Sea moved southward about 24km away from the modern coastline and declined by 13m then the modern sealevel. It has been found that Mn concentration of ooze water in the study area is higher by 1—2 grades then that in the central part of The Pacific Ocean, Thus it is favorable to the mineralization of mangenese nodules.