摘要
通过全面收集不同来源的北极海区数据,采取严格的质量控制标准筛选整合北极海区表层沉积物粒度数据共4245站,并应用粒级组分栅格叠加方法绘制北极海区沉积物类型图,探讨表层沉积物分布特征及其主要控制因素。研究结果表明:(1)北极海区沉积物类型非常丰富,特别是含砾沉积物在陆架分布更为广泛;(2)含砾沉积物以含砾泥、含砾泥质砂、含砾砂、砾质泥和砾质泥质砂为主,而不含砾沉积物则主要以粉砂质砂、泥质砂、砂质粉砂、砂质泥和泥等为主;(3)北极海区沉积物分布主要受到河流输入、海岸侵蚀、海冰和冰山和洋流等因素的控制,河流输入和海岸侵蚀提供了主要的陆源沉积物来源;(4)海冰和冰山对粗粒碎屑物质的搬运尤为重要,洋流控制着沉积物输运路径,海冰携带沉积物可随洋流长距离输运至北冰洋中部和格陵兰海等深水区域。
This paper comprehensively collected the Arctic seas sediment data by domestic and international sources,selected and integrated 4245 stations of surface sediment grain size data in the Arctic seas by using strict quality control criteria,and used the grain size component grid superposition method to map the dis-tribution of sediment types in the Arctic seas area.The distribution characteristics of surface sediments types and the main controlling factors were studied and discussed.The results showed that:(1)The types of sedi-ments in the Arctic seas were very abundant,especially the gravel-bearing sediments were widely distributed on the continental shelf.(2)The gravel-bearing sediments were mainly included slightly gravelly mud,slightly gravelly muddy sand,slightly gravelly sand,gravelly mud and gravelly muddy sand,the gravel-free sediments mainly included silty sand,muddy sand,sandy silt,sandy mud and mud.(3)The distribution of sediment types in the Arctic sea was mainly controlled by river input,coastal erosion,sea ice and icebergs transport and ocean currents,river input and coastal erosion provided the main terrestrial sediment sources.(4)Sea ice and icebergs were particularly important for the transport of coarse-grained detrital sediments,and ocean currents controlled the transport path of sediments and sea ice,which can transported sediments over long distances to deep-water areas such as the central Arctic Ocean and the Greenland Sea.
作者
余佳
刘志杰
舒雨婷
田先德
孔敏
李维禄
YU Jia;LIU Zhijie;SHU Yuting;TIAN Xiande;KONG Min;LI Weilu(National Marine Data and Information Service,Tianjin 300171,China)
出处
《极地研究》
2025年第3期522-531,共10页
Chinese Journal of Polar Research
基金
国家自然科学基金(42206226)
国家海洋信息中心青年科学基金(202101002)资助。
关键词
多源数据
粒度
沉积物
分布类型和特征
北极海区
multi-source data
grain size
sediment
distribution and characteristics
Arctic seas
作者简介
余佳,男,1987年生。高级工程师,主要从事海洋地质数据处理及分析应用。E-mail:yujia0548@163.com;通信作者:孔敏,E-mail:km_nmdis@163.com。
