【摘要】 北大西洋洛克尔海槽东北部水深约１ ０００ ～１ ０００ ｍ 处有两个大型沉积物波发育区。波长１ ～２ ｋｍ ，波高１８ ～２０ ｍ ，分布面积分别为３５０ ｋｍ ２ 与２０ ｋｍ ２ 。沉积物波向上坡迁移，内部包括上攀床形单元、不对称波形单元及正弦波形单元。前人提出的大区沉积物波挪威海底层水溢流成因及小区沉积物 Ｌｅｅ 波迁移模式都存在许多问题。根据古气候及古洋流资料，研究区内沉积物波各单元形成时具备内波形成的条件，内波的发育与等深流的活动密切相关。运用内波理论可对沉积物波各构成单元作出合理的水动力学解释，研究区内两列同向内波的叠加、单列内波及内驻波先后作用海底，可分别形成大型上攀床形、不对称波形及正弦波形单元。更多还原

【Abstract】 Tow sediment wave fields are developed in a depth zone of about 1 000 1 100m in the north eastern Rockall Trough.Their wavelengths vary from 1 to 2 km and waveheights from 18 to 20 m,covering area of 350km 2 and 20km 2 respectively.Sedment waves migrate upslope and include generally an upslope climbing,asymmetry upslope and sinusoidal shape in stratigraphic section.The conclusions proposed by former scholars that sediment waves of large area were formed by the overflow moving from the Norwegian Ses and the Lee Wave modle has caused the upslope migration of the sediment waves of small area have many problems.Considering the paleoclimate and paleocirculation,internal waves coul be generated in study area while every unit of the sediment waves was being formed.The formation of internal waves is related to contour currents closely.Resonnable hydrolic mechanism of sediment waves formation can be obtained accord ing to the theory of internal wave.Generated under different paleoclimatic and paleocirculative conditions,the combining of two internal waves propagating toward the same direction,unique internal wave and internal stand wave which inter sected sea floor successively would form a general basal climbing,intermidiate asymmetric and upper sinusoidal shape in stratigraphic section.更多还原