摘要:
通过对中太平洋海盆表层沉积物与相伴生的锰结核的研究表面,丰度、品位等有明显的差异,在深海粘土中锰结核干度最度,钙质软泥多,锰结核的发现聚集与沉积物类型,沉积速率、孔隙度、金属含量及形成时的氧化还原条件,水深、底层流等的影响.锰结核的形成,发育与富集是受多种因素所控制,是一个模式内的约制。
Abstract:
44 sediment samples were collected from northeastern part of Cenual Pacific Ocean basin during 1985- 1986 cruise. These sediments were classified into six types: calcareous ooze, calcareous clay,siliceous clay, deep-sea clay, zeolite clay and zcolite rich clay. The distribution, characteristics and controlling factors of these sediments, as well as some relationship between the surface sediments and manganese nodules are discussed in this paper. Deep-sea clay which appears brown or dark brown is distributed widely on the sea Moor at below 5200m water depth. The contents of the coarse fractions in the deep-sea clay is Icss than 15%。and these arc composed dominantly of radiolarian remain and zeolite. The contents of clay is more than 85%. Calcareous sediments(calcareous ooze and calcareous clay) were distributed in the surround of hills. in where water depth is above CCD(5200m ).Its coarse fraction of which consists almost exclusively of the foraminifera shells, of which the contents range between 11%and 90% or so. Zcolite clay is dark brown. The contents of zcolite(phillipsite) in the zcolite clay.
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