Molecular and radiocarbon constraints on the fate of sedimentary organic carbon in a human-impacted river-dominated ocean margin
文献类型：期刊论文
| 作者 | Wang, Chenglong5; Zhang, Chuchu5; Zhang, Zhuoyue5; Liao, Qihang1,5; Zhang, Yang4,5; Wang, Ning2,3; Wang, Yaping5; Zou, Xinqing1,5 |
| 刊名 | MARINE GEOLOGY
 |
| 出版日期 | 2024-07-01 |
| 卷号 | 473页码:12 |
| 关键词 | River -dominated Ocean margins Hydrodynamic sorting Human perturbations Mineral protection Molecular biomarkers Dual carbon isotope |
| ISSN号 | 0025-3227 |
| DOI | 10.1016/j.margeo.2024.107322 |
| 英文摘要 | Organic carbon (OC) burial in river-dominated ocean margins plays a pivotal role in the global carbon cycle, impacting atmospheric CO2 levels over the long term. Despite its significance, uncertainties persist regarding the influence of external environmental factors and intrinsic properties on sedimentary OC. In this study, we conducted a comprehensive analysis of surface sediments from the East China Sea, examining geochemical properties (including total OC content [TOC], Delta C-14, delta C-13, and C/N ratio), terrestrial biomarkers (n-alkanes), and mineral properties (such as specific surface area, Al/Si ratio, and mineral composition). Our aim was to shed light on the fate of sedimentary OC. The surface sediment's Delta C-14 values displayed significant spatial heterogeneity, delineating four distinct sub-regions. Strong positive correlations (all p < 0.01) were found between the triangle C-14 values and fine-grained sediments, specific surface area, and clay minerals, suggesting the potentially pivotal role of mineral protection in shaping the fate of sedimentary OC. The proportion of terrestrial OC gradually decreased towards the south, while marine OC proportion increased, corresponding to the enrichment of Delta C-14. The co-variation of Delta C-14 values, mineral properties, and OC source proportions suggests that terrestrial OC may undergo progressive replacement by marine OC during southward transport. Temporal variations in triangle C-14 values indicated that seabed erosion led to a significant increase in triangle C-14 values (p < 0.01) in the coastal mud belt, a phenomenon likely common in river-dominated ocean margins globally due to the new sediment cycle during the Anthropocene. |
| WOS研究方向 | Geology ; Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:001249370300001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/78441]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Zou, Xinqing |
| 作者单位 | 1.Nanjing Univ, Collaborat Innovat Ctr South China Sea Studies, Nanjing, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Ctr Excellence Deep Earth Sci, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 3.Southern Marine Sci & Engn Guangdong Lab Guangzhou, Guangzhou 511458, Peoples R China 4.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing, Peoples R China 5.Nanjing Univ, Sch Geog & Oceanog Sci, Minist Educ, Key Lab Coast & Isl Dev, Nanjing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Chenglong,Zhang, Chuchu,Zhang, Zhuoyue,et al. Molecular and radiocarbon constraints on the fate of sedimentary organic carbon in a human-impacted river-dominated ocean margin[J]. MARINE GEOLOGY,2024,473:12. |
| APA | Wang, Chenglong.,Zhang, Chuchu.,Zhang, Zhuoyue.,Liao, Qihang.,Zhang, Yang.,...&Zou, Xinqing.(2024).Molecular and radiocarbon constraints on the fate of sedimentary organic carbon in a human-impacted river-dominated ocean margin.MARINE GEOLOGY,473,12. |
| MLA | Wang, Chenglong,et al."Molecular and radiocarbon constraints on the fate of sedimentary organic carbon in a human-impacted river-dominated ocean margin".MARINE GEOLOGY 473(2024):12. |
入库方式： OAI收割
来源：广州地球化学研究所
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