青岛唐岛湾的形成机制与海岸演化  

The Formation Mechanism and Coastal Evolution of Tangdao Bay,Qingdao,Eastern China

作　　者：罗勤民 秦永鹏[2] 贾珍臻 

机构地区：[1]中国石油大学地球科学与技术学院,青岛266555 [2]南京大学地球科学与工程学院,南京210093

出　　处：《高校地质学报》2011年第4期620-627,共8页Geological Journal of China Universities

基　　金：教育部国家大学生创新性实验计划项目(0701001)

摘　　要：通过野外地质调查,结合区域地质背景,探讨分析了青岛唐岛湾的形成机制与海岸演化过程。结果表明,唐岛湾的形成机制主要涉及三个方面:NNE—NE向断裂的活动奠定构造格局并控制其岸线的延伸方向;第四纪冰川的侵蚀作用塑造中间低洼、两岸较高的基底地形;约10kaBP前的大规模海侵使海水突破口门的阻挡进入湾内,唐岛湾正式形成。其海岸形态自全新世以来可分为三个演化阶段,主控因素为海平面变化、海浪和潮汐作用,宋代时刘家岛与石岭子之间连岛沙坝的形成标志着唐岛湾成为半封闭性海湾,清代时其海岸形态接近现今面貌。Integrated with field observations and analysis of fault structures this study investigated the formation mechanism and coastal evolution of Tangdao Bay in Qingdao,eastern China. The result indicates that three elements are essential for the formation of Tangdao Bay（1） NNE-NE trending faults coutrolled the structural framework and extendsional direction;（2） Quaternary glacial erosion casted a profile that is charaterized by lowlands in the middle and high terrains on both sides;（3） Around 10 ka BP,as a large-scale transgression occurred,sea water flooded the lowlands and Tangdao Bay was formed. After the transgression,Tangdao Bay has experienced three geological evolution stages since Holocene,while sea level changes,waves and tides are dominating factors for coastal changes,respectively. With the connection of a tombolo between Liujiadao and Shilingzi in Song Dynasty,Tangdao Bay evolved into a semi-enclosed bay. By the Qing Dynasty,the coastal landforms became similar to what they are today.

关 键 词：海湾 海岸演化 形成机制 唐岛湾 山东半岛 

分 类 号：P534.63[天文地球—第四纪地质学]