摘要
在研究区已施工22个钻孔及47处陡坎剖面调查基础上,详细研究了本区全新世地层的沉积物特征、沉积环境及其空间展布形态;认为本区全新统为一套由陆相-海相-陆相交互沉积的松散沉积物,成因类型主要为冲积、湖沼沉积以及海积,沉积相主要为分支河道、边滩、泛滥平原、潮汐河道、潮间带、潮上带、滨海湖沼等。受构造-气候事件影响,沉积物在横向上陆-海-陆交叉松散沉积叠加形似3个交错穿插的"楔形体";垂向上,沉积物粒度具正韵律层序,局部海侵层可见反韵律层序。总体上反映该区全新世以来陆—海交互作用及海进—海退演变历程。
22 drilling holes and 47 scarp profiles study of characteristics, distribution pattern and in the area consists of unconsolidated terrestrial, were collected from the West Bank of the Bohai Sea for depositional environment of the Holocene. The Holocene marine and transitional deposits in various origin, such as alluvial, lacustrine and marine sediments. Upon the influence of sea level changes and tectonic movement, the sediments moved spatially with time and formed 3 wedge-like patterns in the region. Vertically, the sediments usually show fining-up rhythms with local reversed rhythms resulted from sea level variation.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2017年第1期59-66,共8页
Marine Geology & Quaternary Geology
基金
天津市矿产资源补偿费项目(天津市蔡公庄乡等1:5万区域地质调查国土房任[2014]20号)
关键词
环境演化
沉积特征
渤海湾
天津
全新统
environmental evolution
sedimentary characteristics
Tianjin
Bohai Bay
Holocene
