海洋地质与第四纪地质2026，Vol.46Issue(3)：177-186,10.DOI:10.16562/j.cnki.0256-1492.2025022101
铁对有机碳的长期保存及古海洋极端事件响应
Long-term preservation of organic carbon by iron and its response to paleo-marine extreme events
摘要
Abstract
Over 20%of organic carbon in marine surface sediments is preserved as iron-bound organic carbon(Fe-OC),and comprehensive analysis of its long-term preservation and responses to paleo-oceanic extreme events holds significant implications for understanding global carbon cycling and climate change.We reviewed the binding/release mechanisms of Fe-OC in marine sediments,compositional differentiation,regional distribution patterns,and the influence of diagenesis on the long-term stability of Fe-OC in marine sediments,and explored the potential influences of major geological events—the Great Oxidation Event of the Paleoproterozoic,the Neoproterozoic"Snowball Earth"event,Mesozoic oceanic anoxic events,and Quaternary glacial-interglacial cycles—on the formation and long-term preservation of Fe-OC.in addition,we revealed that the enrichment of Fe-OC was controlled by various factors in sedimentary environments,in which redox processes of iron played a critical role and had dual effects of preservation and degradation on Fe-OC.Paleo-oceanic extreme events likely modulated Fe-OC dynamics by altering iron redox cycling and its interactions with organic carbon.关键词
海洋沉积有机碳/活性铁/铁结合态有机碳/长期埋藏/古海洋极端事件Key words
marine sedimentary organic carbon/reactive iron/iron-bound organic carbon/long-term burial/ancient marine extreme events分类
海洋科学引用本文复制引用
彭传沼,包锐,朱茂旭..铁对有机碳的长期保存及古海洋极端事件响应[J].海洋地质与第四纪地质,2026,46(3):177-186,10.基金项目
青年科学基金项目(A类)原国家杰出青年科学基金项目"海洋碳-14有机地球化学"(42525604) （A类）
国家自然科学基金项目"受河流输入影响的陆架海沉积物中厌氧代谢驱动的总碱度产消机制及输出通量研究"(42476036) （42476036）
