台湾海峡北部泥质沉积物中的沉积记录与识别

项目名称： 台湾海峡北部泥质沉积物中的沉积记录与识别

项目编号： No.41206048

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 海洋科学

项目作者： 叶翔

作者单位： 国家海洋局第三海洋研究所

项目金额： 27万元

中文摘要： 陆架泥质沉积物是陆海相互作用研究的重点对象之一，其中的沉积记录对揭示气候变化、环境演变、沉积物来源和输送及其对人类活动的响应具有重要的意义。本项研究拟以台湾海峡北部为研究区域，通过对典型位置的时间序列的水动力过程、沉积物和悬浮体粒度、色素、甾醇、烯酮、粘土矿物等参数的观测，尝试建立研究区表征不同来源的信息在沉积物中记录的多参数指标；并综合分析水体、沉积物捕获器、表层沉积物和柱状沉积物中的物源指标信息，结合沉积动力过程的研究，分析泥质区沉积记录的形成、埋藏过程；为沉积环境和生态系统变化研究提供有用的基础数据，为海洋沉积记录与全球变化研究提供科学参考。

中文关键词： 沉降颗粒物；泥质沉积物；生物标记物；有机碳；沉积记录

英文摘要： Continental shelf mud sediment is one of the key problems in the studies of land-ocean interaction. Sedimentary records are important for climate change, environmental evolution, sediment source and transport, and its response to human activities. In this study, the northern Taiwan Strait as the study area will be chose. Because the sediment types include mud, the sources of sediment are rich and complicated, the deposition rate is high, and upwelling occurs, the mud zone in the northern Taiwan Strait is a good area for researching the sediment source, environment records and identification of the mud sediments. Through the measurement of hydrodynamic process, grain size, pigment, sterols, alkenone, clay, multi indexes that can indicate the different source of sediment will be recognized and built. Integrated the multi indexes in seawater, sediment trap, surface sediment and core sediment, combined the sediment dynamic process, the forming and embedding process of sediment records in mud area will be analyzed. This study can provide the basic data for researching the change of sediment environment and ecological system, provide reference for studying marine sediment record and global change.

英文关键词： Depositional particle；muddy sediment；biomarker；total organic carbon；sedimentary record