| LIU Baohua,ZHENG Yanpeng,WU Jinlong,HAN Guozhong,ZHANG Deyu. 2004. Morphological characteristics in the area off eastern Taiwan Island and their tectonic implications. Acta Oceanologica Sinica, (3):449－461 |
| Morphological characteristics in the area off eastern Taiwan Island and their tectonic implications |
| Morphological characteristics in the area off eastern Taiwan Island and their tectonic implications |
| Received:January 11, 2004 Revised:May 20, 2004 |
| DOI： |
| Key words:Taiwan Island morphological characteristics tectonic implications |
| 中文关键词: Taiwan Island morphological characteristics tectonic implications |
| 基金项目: |
| Author Name | Affiliation | E-mail | | LIU Baohua | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
Key Laboratory of Marine Sedimentology and Environmental Geology of State Oceanic Administration, Qingdao 2660061, China | lbh@cnqd.net | | ZHENG Yanpeng | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
Key Laboratory of Marine Sedimentology and Environmental Geology of State Oceanic Administration, Qingdao 2660061, China | | | WU Jinlong | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
Key Laboratory of Marine Sedimentology and Environmental Geology of State Oceanic Administration, Qingdao 2660061, China | | | HAN Guozhong | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
Key Laboratory of Marine Sedimentology and Environmental Geology of State Oceanic Administration, Qingdao 2660061, China | | | ZHANG Deyu | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
Key Laboratory of Marine Sedimentology and Environmental Geology of State Oceanic Administration, Qingdao 2660061, China | |
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| Abstract: |
| On the basis of bathymetric data and other geological and geophysical data obtained during the first survey conducted by Chinese Mainland in the area off eastern Taiwan Island from May to June in 2000,the morphological features of the region,the tectonic control to the seafloor topography and their tectonic implication are studied and discussed.The results have revealed that both the slope zone of the Ryukyu arc and the Ryukyu Trench present a typical morphotectonic characteristics controlled by the trench-arc system in the West Pacific Ocean.At the slope of eastern Taiwan Island the isobathic lines parallel to the coastline and distribute densely in nearly N-S direction and the slope gradient of topography is large.Such a unique feature is attributed to the collision of the Luzon arc and Eurasia continent.In the Huatung Basin,turbidity fans and submarine canyons are well developed,the formations of which are mainly related to the steep topography of the slope of the Luzon are and the abundants Eurasia continent.In the Huatung Basin,turbidity fans and submarine canyons are well developed,the formations of which are mainly related to the steep topography of the slope of the Luzon arc and the abundant supply of sediments.These submarine canyons are controlled by basement highs and strike-slip faults.On eastern side and western side of the Gagua Ridge,both the water depth and morphological features are different,but the basement of Gagua Ridge belongs to the Huatung Basin.The eastern side of the Gagua Ridge(123°12' E) corresponds to the boundary of two plates with different ages.In the West Philippine Basin,linear ridges and troughs in a NW trending are identified,which are dissected by a NE trending transform fault.According to the seafloor topography features,the direction of the transform fault and the magnetic anomaly lineations,the seafloor of this region was formed during 60-45 Ma B.P.when the West Philippine Basin was spreading along NE-SW relative to the present orientation. |
| 中文摘要: |
| On the basis of bathymetric data and other geological and geophysical data obtained during the first survey conducted by Chinese Mainland in the area off eastern Taiwan Island from May to June in 2000,the morphological features of the region,the tectonic control to the seafloor topography and their tectonic implication are studied and discussed.The results have revealed that both the slope zone of the Ryukyu arc and the Ryukyu Trench present a typical morphotectonic characteristics controlled by the trench-arc system in the West Pacific Ocean.At the slope of eastern Taiwan Island the isobathic lines parallel to the coastline and distribute densely in nearly N-S direction and the slope gradient of topography is large.Such a unique feature is attributed to the collision of the Luzon arc and Eurasia continent.In the Huatung Basin,turbidity fans and submarine canyons are well developed,the formations of which are mainly related to the steep topography of the slope of the Luzon are and the abundants Eurasia continent.In the Huatung Basin,turbidity fans and submarine canyons are well developed,the formations of which are mainly related to the steep topography of the slope of the Luzon arc and the abundant supply of sediments.These submarine canyons are controlled by basement highs and strike-slip faults.On eastern side and western side of the Gagua Ridge,both the water depth and morphological features are different,but the basement of Gagua Ridge belongs to the Huatung Basin.The eastern side of the Gagua Ridge(123°12' E) corresponds to the boundary of two plates with different ages.In the West Philippine Basin,linear ridges and troughs in a NW trending are identified,which are dissected by a NE trending transform fault.According to the seafloor topography features,the direction of the transform fault and the magnetic anomaly lineations,the seafloor of this region was formed during 60-45 Ma B.P.when the West Philippine Basin was spreading along NE-SW relative to the present orientation. |
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