山东莱州浅滩地区沉积特征与沉积作用  

ON THE SEDIMENTATION CHARACTERISTICS AND MORPHODYNAMIC MODEL OF THE LAIZHOU SHOAL,SHANDONG,CHINA

作　　者：王庆[1] 战超[1] 商杰[2] 宋传广[1] 仲少云[1] 刘亚龙[1] 王红艳[1] 

机构地区：[1]鲁东大学海岸研究所,烟台264025 [2]国家海洋局北海预报中心,青岛266033

出　　处：《海洋与湖沼》2011年第3期337-342,共6页Oceanologia Et Limnologia Sinica

基　　金：国家自然科学基金项目;41071011号;教育部重点科技项目;210122号;山东省自然科学基金项目;Z2008E03号;山东省高等学校科技计划项目;J09LE07号;烟台市科技攻关计划项目;2008323号

摘　　要：通过系统采集海底表层沉积样品进行粒度测试分析,对现代莱州浅滩地区的沉积类型、粒度特征、泥沙搬运方式、运移趋势及沉积动力、沉积机制进行了研究。结果表明,莱州浅滩是形成于松散碎屑堆积海岸岬角岸外的砂砾质水下沙洲/沙脊,它的形成深刻改变了浅滩地区原有的沉积动力和机制,在浅滩两侧海域各自形成了大致对称的潮余环流,分别与两个主要由跃移质和悬移质组成的沉积区域对应。莱州浅滩的沉积动力模式与现有的岬角相连型浅滩沉积动力模式均不同,可能代表了岬角相连型水下沙洲/沙脊的一种新的类型。By testing granularity of surface sediment samples, we studied sedimentary types, granularity characteristics, sediment transporting pathway, sediment migration trends, sedimentary dynamic and morphodynamic model of the Laizhou shoal. The results showed that the Laizhou shoal is sand banks/ridges made of loose clastic sediment, the formation of the shoal has profoundly changed the original sedimentary system through circulations of two symmetrical tidal residual current on both sides of the shoal, which corresponded to two sedimentary depocenters dominated by saltation and suspended load, respecitvely. Morphodynamic model of Laizhou shoals is different from the existing models about head- land associated shoals, and this shoal represents a new type of headland associated sand banks/ridges.

关 键 词：水下沙洲/沙脊 动力沉积 莱州浅滩 岬角相连型沙洲 刁龙嘴 

分 类 号：P731[天文地球—海洋科学]