作　　者： ; ; ; ;

机构地区： 中国石油大学华东地球科学与技术学院

出　　处： 《古地理学报》 2009年第3期338-347,共10页

摘　　要： 通过多种仪器分析,测定了胶州湾李村河河口区4个沉积物柱状样品的有机碳(TOC)、酸可挥发硫化物(AVS)及重金属元素活性部分(活性金属)的含量,并系统讨论了其环境响应特征。研究发现,胶州湾李村河河口区三角洲沉积物中的有机碳、AVS和活性金属元素的分布受与河口的距离及沉积相带分布的影响。近河口细粒物质沉积区域的有机质受陆源控制,有机碳含量较高,AVS和活性金属元素含量高,活性铁的含量是AVS形成的主控因素,同时AVS也是多数活性金属元素在沉积物中的主要赋存形态。而离河口较远区域,有机碳含量受海、陆双向物源控制,AVS含量主要受控于有机质含量,两者含量均相对较低,活性金属元素含量也较低,多数金属元素(Cd、Cr、Cu、Mn、Pb、Zn等)主要以依附于铁的形态存在。根据上述沉积特点,将胶州湾李村河河口区沉积环境划分为3类区域5种类型,分别是一类区域中的水下分流河道和分流间湾,二类区域中的水下分流河道和分流间湾及三类区域中的前缘席状砂。 The total organic carbon （TOC）, acid volatile sulfide （AVS）, and heavy metal elements content for four sediment cores, which were collected from the Licun Estuary of Jiaozhou Bay near Qingdao, Shandong Province were measured by instruments. Their environmental responses were discussed. It was found that the distribution of TOC, AVS and heavy metal elements was controlled by the distance away from the estuary and facies distribution. Near the entrance of the river, TOC content was relatively high and was controlled by terrestrial input. The AVS and heavy metal elements content were relatively high. The quantity of active Fe controlled the formation of AVS, and most reactive metals relied on AVS.A short distance away from the entrance of the river, sediments were coarser and its TOC content was lower than those near the entrance, and it was controlled by both marine and terrestrial sources. The AVS and heavy metal content were relatively low. The quantity of TOC controlled AVS production, and most reactive metals relied on the Fe form. Based these elements were separated into three on the sedimentary characteristics, the environmental areas and five types, i.e. the subaqueous distributary distributary bay in type 1 area, the subaqueous distributary channel and distributary bay in and the delta front sandbodies in type 3 area. responses of channel and type 2 area,

关 键 词： 胶州湾 有机碳 酸可挥发硫化物 重金属元素 环境响应

领　　域： [天文地球] [天文地球]