摘要
利用SM2000多波束探测系统对扬子浅滩东南边缘进行高精度探测,对研究区海底底形特征进行分析并对其成因进行探讨,结果表明：研究区-50 m水深附近分布3条东西向伸展的潮流沙脊,脊高在10 m左右,宽约10 km,属于冰消期11~9 kaBP残留的滨岸砂体,沙脊表面普遍分布冲蚀沟、坎、坑等次一级冲蚀底形,沟深1 m左右,似乎平行排列,NNW—SSE向伸展,系现代潮、浪流冲刷侵蚀的微地貌,说明3条残留潮流沙脊目前正处于侵蚀状态。
The southeast of Yangtge shoal were thoroughly investigated by using SM2000 sounding system.The results indicate that there are three east-west tidal sand ridges which are about 10 meters high and 10 kilometes wide around the 50-meter isobath.They are relict sand bodies Bormed in LGM 11-9 kaBP.Upon the sand ridges there are erosional gullies、erosional pits and erosional scarps.The erosional gullies,as a result of the recent tidal and wave action,are 1meter in depth and in a NNW—SSE parallel pattern.
出处
《海洋地质动态》
北大核心
2010年第9期1-5,共5页
Marine Geology Letters
基金
海底地形地貌调查与研究(908-01-DX19)
