烟台芝罘岛连岛沙坝地区全新世以来的地貌与环境演变  

GEOMORPHOLOGIC AND ENVIRONMENTAL EVOLUTIONS IN THE REGION OF THE ZHIFU ISLAND TOMBOLO OF THE SHANDONG PENINSULA

作　　者：王庆[1] 仲少云[1] 毛爱华[1] 满宗元 

机构地区：[1]烟台师范学院地理系,烟台264025 [2]山东省沂南第二中学,沂南256300

出　　处：《海洋地质与第四纪地质》2003年第3期31-36,共6页Marine Geology & Quaternary Geology

基　　金：山东省优秀中青年科学家奖励基金项目

摘　　要：在前人研究成果和已有钻孔资料的基础上,通过野外观测、地貌制图、钻探、取样、年代测定和孢粉分析,对芝罘岛连岛沙坝地区全新世以来的地貌和环境演变进行了研究。结果表明,芝罘岛沙坝地区可划分为北部芝罘岛、南部基岩岬角和中部海积—冲积—风积平原3个地貌单元,其中中部堆积平原又包括西部的河口沙坝—泻湖平原和东部的连岛沙坝平原,其界线为大沽夹河河口。芝罘岛沙坝地区全新统包括5种沉积相、11种沉积亚相,它们构成海侵体系(TST)和高海面体系(HST)两种基本层序,前者形成于6000aBP前的全新世最大海侵时期,后者形成于6000aBP以来的相对海面波动时期。芝罘岛连岛沙坝北部形成于6000～5000aBP的相对海面稳定期及4000aBP以来的波动期,其下伏平台6000aBP前即己形成;沙坝南部开始形成于2300aBP前,最后成陆于300a以来,但其下伏平台在7700aBP前已形成。4000aBP以来相对海面的波动式升降及其河流、海岸地貌响应,在连岛沙坝的形成过程中起了重要作用。Based on the previous research results and drilling materials, the geomorphologic and environmental evolutions in the region of the Zhifu Island tombolo were studied in field work, geomorphologic mapping, drilling, sampling, dating, and sporepollen analysis. The results show that the tombolo region can be divided into three geomorphic units,namely, the Zhifu Island in the north, erosion rock headland in the south and marinefluvialaeolian plain in the middle. The plain in the middle also includes the estuarine barlagoon plain in the west and the tombolo plain in the east with the Dagujia River mouth as the dividing line. The Holocene series include five sedimentary facies and eleven subfacies which make up two basic sedimentary sequences: the transgressive system tract (TST) and the highstand system tract (HST).The HST was formed in the early Holocene,when the Holocene maximum transgression took place.The HST has been formed since 6 000 aBP, during which the relative sea level undulated continuously. The northern part of the Zhifu Island tombolo took shape during the Holocene relative sea level standstill phase (6 000～4 000 aBP) and the undulating phase since 4 000 aBP, but its barrier platform already formed 6 000 years ago. The southern part began to form 2 300 years ago and became land since 300 aBP,but its barrier platform already formed as early as 7 700 years ago. The undulation of the relative sea level since 4 000 aBP with its fluvial and coastal geomorphic responses has played an important role in the formation of the tombolo. 

关 键 词：全新世 河床纵剖面 相对海面变化 沙坝平台 芝罘岛连岛沙坝 

分 类 号：P737.12[天文地球—海洋地质]