摘要
渤、黄、东海是典型的物源供给丰富的宽广陆架环境,形成的全新世沉积记录十分丰富。本区域潮汐作用、陆架环流作用和沉积物重力流导致的物质输运都很活跃;陆架沉积动力过程与全新世沉积体系的空间分布、物质组成、堆积速率、层序年代等特征相联系。全新世陆架与海岸沉积具有高分辨率、空间分布的不连续和沉积记录的片段性等特征。江苏海岸全新世中期海岸沉积、杭州湾全新世早—中期沉积、浙闽沿岸全新世沉积和其他陆架泥质沉积可从物质来源(海面上升中的沉积改造和河流入海通量)、输运—堆积过程、沉积层序形成的先后次序、陆架沉积记录的未来状况等方面进行分析。数值模拟可用以深化本区的过程—产物关系研究。
The shallow marine regions consisting of the Bohai, Yellow and East China Seas represent a typical wide continental shelf environment with abundant terrestrial sediment supply. Here, a variety of sedimentary records have been formed during the Holocene period. The Holocene sedimentary systems developed here have unique characteristics in terms of spatial distribution, material composition, Sedimentation rate and the timing of accumulation, which are related to active sediment transport processes induced by tides, shelf circulations and sediment gravity flow. The sedimentary records thus formed tend to be high resolution slices, i.e., each record has a resolution of 〈102 years and covers a part of the Holocene period. In the field of process-product relationship study, the mid-Holocene coastal deposits on the Jiangsu coast, the early to middle Holocene sequences of the Hangzhou Bay, the Holocene mud deposits off the Zhejiang-Fujian coasts and theother mud areas over the region are of importance. These systems may be understood by identifying the material supply （from both sea bed reworking during the sea level rise event and river discharges）, transport-accumulation processes, the formation of the sediment sequences and the future evolution of the sedimentary systems, for which numerical modeling becomes increasingly important.
出处
《沉积学报》
CAS
CSCD
北大核心
2013年第5期845-855,共11页
Acta Sedimentologica Sinica
基金
国家重大科学研究计划项目"扬子大三角洲演化与陆海交互作用过程及效应研究"(批准号:2013CB956500)资助
关键词
沉积物输运—堆积过程
全新世沉积体系
过程—产物关系
沉积记录
中国东部陆架
sediment transport-accumulation processes
Holocene sediment systems
process-product relationships
sedimentary records
eastern China shelf seas
