海洋地质与第四纪地质2025，Vol.45Issue(2)：1-11,11.DOI:10.16562/j.cnki.0256-1492.2024121101
3万年以来日本海西部沉积物砷演化及其古环境意义
Evolution of sedimentary arsenic in the western Sea of Japan over the last 3 0000 years and its paleoenvironmental significance
摘要
Abstract
Arsenic(As)is a redox-sensitive element widely distributed in the nature.However,its reliability as a proxy for tracing redox conditions in marine sediments remains controversial.The Sea of Japan,one of the most extensively developed marginal seas of the northwest Pacific,has experienced significant redox condition changes since the Last Glacial Period,making it a natural laboratory for understanding the evolution of sedimentary As.Through high-resolution analysis of As,Mo,and other parameters in sediments from core LV53-18-2,significant variations in As and Mo concentrations over the past 30 000 years in the western Sea of Japan were observed.During the Heinrich Stadial 1(19～15 ka),the synchronous enrichments of As and Mo indicate anoxic or sulfidic conditions in sediments.In contrast,during the Last Glacial Period(30～19 ka)and the late deglacial-early Holocene(15～8 ka),asynchronous variations between As and Mo occurred.Seasonal sea ice activity not only increased the transport of terrestrial As to the sea but also accelerated the formation of deep water in the Sea of Japan and internal ventilation.Since 8 ka,both As and Mo concentrations were decreased synchronously.The improved global climate and sea level rising conditions enhanced the productivity at sea surface and biogenic material contributions in the Sea of Japan,which diluted the sedimentary As concentrations.Given the complexity of the As enrichment mechanisms in sediments,we suggest that As is not a reliable proxy for tracing redox changes in marine sediments,and its use in paleo-redox reconstructions should be validated in conjunction with other proxies.关键词
沉积物砷/氧化还原/古环境/末次冰期/日本海Key words
sedimentary arsenic/redox environment/paleoenvironment/Last Glacial Period/Sea of Japan分类
海洋学引用本文复制引用
方良璁,邹建军,豆汝席,王庆超,朱爱美,Gorbarenko Sergey,Vasilenko Yuriy,Bosin Aleksandr,石学法..3万年以来日本海西部沉积物砷演化及其古环境意义[J].海洋地质与第四纪地质,2025,45(2):1-11,11.基金项目
"海洋十年"国际合作中心科技合作项目"中俄西北太平洋环境变化及碳汇效应合作"(GHKJ2024006) （GHKJ2024006）
国家重点研发计划"第四纪典型暖期北极气候变化及其对东亚环境的影响"(2023YFF0804600) （2023YFF0804600）
国家自然科学基金项目"日本海末次间冰期以来的古环境与古气候演化研究"(41420104005) （41420104005）
