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南黄海辐射状沙脊成因的沉积动力学研究
引用本文:朱玉荣,常瑞芳.南黄海辐射状沙脊成因的沉积动力学研究[J].海洋科学集刊,2001(43):38-50.
作者姓名:朱玉荣  常瑞芳
作者单位:中国科学院海洋研究所;青岛海洋大学海洋地球科学学院
基金项目:中国科学院海洋研究所调查研究报告4052号。国家自然科学基金资助项目,49476380号,49876018号;中国博士后科学基金资助项目,2241号。
摘    要:自南黄海辐射状沙脊被发现,尤其是江苏省海岸带和海涂资源综合调查揭示了其全貌,并同时测得辐射状沙脊区存在辐射状潮流场(任美愕,1986)以来,对南黄海辐射状沙脊的成因,主要包括其形成的水动力条件、物质来源、形成机理与形成过程等,本领域学术界一直存在争论1)(李从先等,1979;任美锷,1986;李成治等,1981;周长振等,1981;万延森,1982;刘振夏,1983;刘振夏等,1983,1995;耿秀山等,1983;夏东兴等,1984;夏综万等,1984;杨长恕,1985;黄易畅等,1987;张光威,1991;赵松龄,1991;朱大奎等,1993;杨治家等,1995;朱玉荣等,1995,1997;张东生等,1996;李从先等,1997)。 南黄海辐射状沙脊的形成机理及形成过程是与其形成的水动力条件、物质来源紧密联系在一起的。持该区的辐射状潮流场是受海底地形与(或)局部弶港海湾形态控制而形成观点的学者,多认为辐射状潮流场形成的同时或之后会反作用于海底地形,逐渐将海底地形改造成辐射状沙脊1)(任美锷,1986;李成治等,1981;万延森,1982;张光威,1991),并且认为辐射状沙脊的形成需要几千年的时间1),或是一个历史过程(李成治等,1981),或经过最近一百多年的改造而形成(万延森,1982),或形成于距今4000年前以来(张光威,1991)。这种观点的本质在于认为辐射状沙脊的辐射状形态是由海底地形的初始辐射状形态决定的,辐射状潮流场的作用在于使具初始辐射状形态的海底地形的辐射状形式更好,即认为辐射状潮流场对辐射状沙脊辐射状形态的形成不起决定作用。认为辐射状潮流场是由东海传入黄海的前进潮波与山东半岛南部的旋转潮波相交汇而形成,并且认为辐射状潮流场有可能自全新世海侵影响本区,或自7000年前以来就一直存在(对古海岸时辐射状潮流场存在的认识只是推测,尚缺乏证据)的学者,多认为辐射状沙脊的辐射状形态是由该区潮流场的辐射状形态决定的(周长振等,1981;刘振夏,1983;夏综万等,1984;杨长恕,1985;黄易畅等,1987;朱大奎等,1993;朱玉荣等,1995,1997),即认为辐射状潮流场对辐射状沙脊的辐射状形态起决定作用。这两种观点根本对立。

关 键 词:辐射状沙脊  沉积动力学  模拟
收稿时间:2000/4/10 0:00:00

SEDIMENT DYNAMICS STUDY ON THE ORIGIN OF THE RADIAL SAND RIDGES IN THE SOUTHERN YELLOW SEA
Zhu Yurong,Chang Ruifang.SEDIMENT DYNAMICS STUDY ON THE ORIGIN OF THE RADIAL SAND RIDGES IN THE SOUTHERN YELLOW SEA[J].Studia Marina Sinica,2001(43):38-50.
Authors:Zhu Yurong  Chang Ruifang
Institution:Institute of Oceanology, Chinese Academy of Sciences; Ocean University of Qingdao
Abstract:The origin of the Radial Sand Ridges in the southern Yellow Sea has been a controversial issue since they were discovered. The M2 tides and tidal currents over the Bohai Sea, Yellow Sea and East China Sea at present and at around 7000 a B. P., 6000 a B. P.,3800 a B. P., the 8th and 11th centuries A. D. were simulated with a two-dimensional tide model. The sediment transport field and sea bottom erosion-accretion pattern in the Paleo-Changjiang River Estuary and its adjacent area at the transgression maximum of Holocene were also calculated. The results showed that the radial tidal current field in the southern Yellow Sea has existed since at least the transgression maximum of Holocene, and is very stable. The formation and existence of the radial tidal current field has no relation to the local bottom topography and the Qianggang Bay outline. The radial tidal current field formed the Radial Sand Ridges in the southern Yellow Sea so they have tidal origin. At the transgression maximum of Holocene, sediment from the Paleo-Changjiang River filled the Paleo-Changjiang River Estuary, was the material source of the Changjiang Delta, and formed the primitive Radial Sand Ridges under the effects of tidal currents which transported sediments from sea to land. The formation of the Radial Sand Ridges in the southern Yellow Sea during the Holocene was mainly divided into five stages, and the inevitable result of the continental-oceanic interaction process in the area of the Changjiang Delta and northern Jiangsu littoral plain at a certain geological history stage.
Keywords:Radial Sand Ridges  sediment transportation  
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