摘要
晚更新世盛冰期低海面时 ,胶州湾为陆地 ,大沽河流于其上 ,河口在黄海陆架边缘。全新世海侵时 ,海水沿古河道侵入 ,约在 9.6ka B.P.左右 ,胶州湾地区被海水淹没 ,并于湾顶西北侧形成 1 96km2 的大沽河溺谷型河口湾 ,当时大沽河河口退缩至今谈家庄—沽河镇 (李哥庄 )一带。随后 ,河流泥沙在该河口湾快速淤积 ,形成十余米厚的水下冲积扇和 1～ 2 m厚的冲积层 ,将溺谷湾充填。约在 4ka B.P.左右大沽河河口外延至现今营海码头村、三角底一带。
During the low sea level pleniglacial period of late Pleistocene,the Jiaozhou Bay was land with the Daguhe River flowing on it,and the river estuary was located at the Yellow Sea continental shelf margin.During the Holocene transgression,the seawater intruded along the paleochannel,the Jiaozhou Bay was submerged by seawater in about9.6ka B.P.to form the drowned Daguhe River estuary bay northwest of the Jiaozhou Bay head,and the Daguhe River estuary retreated to the Tanjiazhuang to Guhezhen area.After this,the fluvial sediments quickly silted in the estuary bay to develop the subaquatic alluvial fan and deposit and to fill up the drowned estuary bay.In about4ka B.P.,the Daguhe River estuary extended outward to Matou village of Yinghai town and Sanjiaodi area.
出处
《海岸工程》
2004年第1期5-12,共8页
Coastal Engineering
基金
国家自然科学基金资助项目--大沽河下游地区典型环境演变( 40 2 460 2 6)
关键词
胶州湾海侵
沉积地层
大沽河
河口湾
古河道
Daguhe River estuary bay
transgression in the Jiaozhou Bay
sedimentary stratum
Holocene
