渤海莱州湾南岸潍河-弥河三角洲:沉积序列和沉积格架  

Weihe River-Mihe River Delta in South Coast of Bohai Sea,China: Sedimentary Sequence and Architecture

作　　者：薛春汀[1] 丁东[1] 

机构地区：[1]国土资源部海洋油气资源和环境地质重点实验室青岛海洋地质研究所,山东青岛266071

出　　处：《地理科学》2008年第5期672-676,共5页Scientia Geographica Sinica

基　　金：黄河三角洲湿地系统综合地质调查与评价项目(1212010611402)资助

摘　　要：潍河-弥河三角洲是一个由多条河流共同塑造的三角洲。前三角洲黏土质粉砂是各河流共同贡献的结果；每条河口之外形成各自的三角洲前缘，主要由极细砂组成；河口间湾沉积物是两条相邻河流共同塑造的，主要为黏土质粉砂。由于河口位置的侧向摆动，三角洲前缘极细砂和河口问湾黏土质粉砂会交替出现。7000aB．P．以来向海进积20～55km，在海岸附近三角州沉积物厚度超过20m。Weihe River-Mihe River Delta on the south coast of the Bohai Sea is contributed by the Jiaolai River, Weihe River, the Bailang River, the Mihe River and the Xiaoqing River, and the historical Jishui River existed in 11 - 1128 A.D. It is a river group delta. The coast line prograteded 20 -55 km from 7000 yr B. P. to 1984. The delta thickness along the coast is over 20 m. The distances between two river mouths is approximately 20 km or less. The clayey silt of the prodelta is jointly constructed by all rivers, very fine sand of the delta fronts are made at the individual river mouths, and the inter-mouth bay clayey silt accumulate between two river mouths. The delta has not distinct abandoned delta lobe. The very fine sand and intermouth bay silt alternately occur in sequence in the delta front because of river mouth movement.

关 键 词：莱州湾 潍河-弥河三角洲 沉积序列 沉积格架 

分 类 号：P736[天文地球—海洋地质]