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ZHANG Xing yang, GAO Zhen zhong, YAO Xue gen. Internal-wave Deposits in the North-eastern Rockall Trough,North Atlantic Ocean ——Reinterpretation of deep-water sediment waves formation[J]. Acta Sedimentologica Sinica, 1999, 17(3): 464-472.
Citation: ZHANG Xing yang, GAO Zhen zhong, YAO Xue gen. Internal-wave Deposits in the North-eastern Rockall Trough,North Atlantic Ocean ——Reinterpretation of deep-water sediment waves formation[J]. Acta Sedimentologica Sinica, 1999, 17(3): 464-472.

Internal-wave Deposits in the North-eastern Rockall Trough,North Atlantic Ocean ——Reinterpretation of deep-water sediment waves formation

  • Received Date: 1998-03-04
  • Rev Recd Date: 1998-06-02
  • Publish Date: 1999-09-10
  • 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 350km2 and 20km2 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.
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  • Received:  1998-03-04
  • Revised:  1998-06-02
  • Published:  1999-09-10

Internal-wave Deposits in the North-eastern Rockall Trough,North Atlantic Ocean ——Reinterpretation of deep-water sediment waves formation

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 350km2 and 20km2 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.

ZHANG Xing yang, GAO Zhen zhong, YAO Xue gen. Internal-wave Deposits in the North-eastern Rockall Trough,North Atlantic Ocean ——Reinterpretation of deep-water sediment waves formation[J]. Acta Sedimentologica Sinica, 1999, 17(3): 464-472.
Citation: ZHANG Xing yang, GAO Zhen zhong, YAO Xue gen. Internal-wave Deposits in the North-eastern Rockall Trough,North Atlantic Ocean ——Reinterpretation of deep-water sediment waves formation[J]. Acta Sedimentologica Sinica, 1999, 17(3): 464-472.
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