摘要
对南黄海西部陆架区626个海底沉积物进行了沉积特征分析,包括粒度和黏土矿物测试。研究结果表明,研究区的表层沉积物类型主要包括砾石、砂、粉砂质砂、砂质粉砂、粉砂、砂质泥和泥。依据表层沉积物成因,将调查区分为4个区:苏北近岸老黄河细粒沉积物区、中东部的残留砂沉积区、西北部的准残留砾石区和东北部的山东半岛水下楔形体末端沉积区。研究区的黏土矿物组合类型主要为伊利石-蒙皂石-绿泥石-高岭石,组合类型与黄河黏土矿物组合类型相同,表明主要物质来源于黄河。研究区中东部分布有粉砂质砂和砂,具有滨岸环境的沉积特征,而与现在所处的沉积环境不相一致,它们被解译为形成于全新世早期的滨岸环境,并在海底留存至今,属"残留沉积"。
Analyses of grain size and clay minerals were made for the 626surficial samples from the western South Yellow Sea.It was found that the sediments in the study area can be classified into the following types:gravel,sand,silty sand,sandy silt,silt,sandy mud,and mud.Based on the sediment origin,the study area is divisible into four districts,that is,fine-grained district around the Old Yellow River in the coast of northern Jiangsu,sandy relict district in the middle and eastern parts of the study area,quasi-re...
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2010年第4期49-56,共8页
Marine Geology & Quaternary Geology
基金
国家自然科学基金项目(40876034)
国土资源部地质调查项目(1212010611401)
关键词
粒度
黏土矿物
沉积特征
物源分析
南黄海西部陆架
seafloor sediments
grain size
clay minerals
sedimentary provenance
South Yellow Sea
