The sand ridge field of the South Yellow Sea: Origin by river–sea interaction
The sand ridge field of the South Yellow Sea: Origin by river–sea interaction
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DOI：
10.1016/j.margeo.2011.01.001
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发表时间：
2012
期刊：
影响因子：
2.9
通讯作者：
Ying Wang;Yongzhan Zhang;X. Zou;D. Zhu;D. Piper
中科院分区：
文献类型：
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作者：
Ying Wang;Yongzhan Zhang;X. Zou;D. Zhu;D. Piper
根据水深测量、海底样品、高分辨率地震剖面和31至71m深钻孔，对南黄海苏北沿岸近海大片沙脊的成因进行了调查。从表层沉积物中取样的沉积物成分（包括重矿物和粘土矿物）表明，大部分沙子来自长江，但在该区域的北部，特别是粘土来自黄河。地震剖面显示沙岭地区南部大部分地区下面有古长江的晚更新世分流河道。全新世海侵切割了广泛的沟壑表面，改造了丰富的晚更新世沙质沉积物。可用的沙子被潮流重新加工成大山脊。山脊的位置受到油田南部残留河道和北部（尤其是油田东北部）潮流的强烈影响，从而形成辐射状的山脊图案。这些山脊提供了河海相互作用造成的大规模地貌特征演化的例子，其中气候和海平面变化发挥了重要作用。
The origin of a large field of sand ridges offshore from the north Jiangsu coast in the South Yellow Sea has been investigated on the basis of bathymetry, seabed samples, high-resolution seismic profiles and 31 to 71m deep boreholes. Sediment composition including heavy minerals and clay minerals sampled from surface sediments shows that most of the sand was derived from the Changjiang (Yangtze) River, but in the northern part of the field particularly the clay came from the Huanghe (Yellow) River. Seismic profiles show late Pleistocene distributary channels of the ancient Changjiang River underlying much of the southern part of the sand ridge field. The Holocene transgression cut a widespread ravinement surface reworking abundant late Pleistocene sandy sediment. The available sand was reworked by tidal currents into large ridges. The location of the ridges is strongly influenced by relict channels in the southern part of the field and by tidal currents in the northern, and especially the northeastern part of the field, resulting in a radiating ridge pattern. These ridges provide an example of the evolution of a large scale geomorphic feature resulting from river–sea interaction, in which climatic and sea level changes played an important role.