沉积学报2025，Vol.43Issue(2)：513-526,14.DOI:10.14027/j.issn.1000-0550.2023.035
末次冰消期以来南黄海中部泥质区有机碳埋藏演化记录
Evolution of Organic Carbon Burial in the Central South Yellow Sea Mud Since the Last Deglaciation
摘要
Abstract
[Objective]Shelf-marginal sea,under land-sea interaction,is a key region with important information re-garding climate,sea-level change,biogeochemical cycles,and human activities.To discuss the phased characteris-tics and influencing factors of organic carbon burial in the background of sedimentary environment evolution since the last deglaciation,[Methods]we analyzed AMS14C dating,the sediment grain size,total organic carbon(TOC),total nitrogen(TN),and stable carbon isotopes(δ13C)of core H12 in the eastern side of central south Yellow Sea mud.[Results]The results show that the hard clay layer developed during the period of relatively low sea level(17-12.6 ka B.P.)with relatively high TOC-MAR(TOC-Mass Accumulation Rate)mainly contributed by terrigenous or-ganic matter.During the transgression period(12.6-7.8 ka B.P.),affected by dynamic effects such as tidal current erosion,TOC originated from mixed terrestrial and marine sources.The terrigenous organic carbon flux shows a signi-ficantly high value around 8 ka B.P.,similar to the obviously increasing sedimentation rate,which may be related to the change of sediment transport mode driven by monsoon.During the high sea level period(beginning 7.8 ka B.P.),the main contribution is marine sources.In particular,from 5-2 ka B.P.,the relative variation of TOC content on the centennial scale is large,consistent with the weakening stage of the Kuroshio Current and the strong period of the East Asian winter monsoon,which may reflect the enhancement of Yellow Sea warm current driven by the East Asian winter monsoon,leading to changes in marine primary productivity and water environment and thus affecting the buri-al of TOC.Since 2 ka B.P.,the variation of TOC content has decreased,and the contribution of organic matter from marine sources has increased,which may be related to the strengthening of ENSO(El Nino-Southern Oscillation)ac-tivities.[Conclusions]In conclusion,sea level change is the main controlling factor of organic carbon burial in the central south Yellow Sea since the last deglaciation.The periodic changes of TOC sedimentary records from high sea level may be related to the changes of the Yellow Sea warm current under the influence of the East Asian winter mon-soon and ENSO activities.关键词
有机碳埋藏/海平面/黄海暖流/末次冰消期/南黄海Key words
organic carbon burial/sealevel/Yellow Sea warm current/last deglaciation/south Yellow Sea分类
地质学引用本文复制引用
李娜,张钰莹,王楠,吴晓,叶君,刘喜停,胡利民..末次冰消期以来南黄海中部泥质区有机碳埋藏演化记录[J].沉积学报,2025,43(2):513-526,14.基金项目
中央高校基本科研业务费专项(202241001,202241007) （202241001,202241007）
山东省泰山学者工程(TSQN20182117) （TSQN20182117）
山东省高等学校"青创团队计划"团队项目(2022KJ045) （2022KJ045）
海底科学与探测技术教育部重点实验室开放基金(SGPT-2022OF-01)[Fundamental Research Funds for the Central Universities,No.202241001,202241007 （SGPT-2022OF-01）
Taishan Scholar Program of Shandong,No.TSQN20182117 （）
Youth Innovation Team Program of Shandong Province,No.2022KJ045 （）
the Opening Foundation of Key Lab of Submarine Geosciences and Prospecting Techniques,Ministry of Education,No.SGPT-20220F-01] （）
