Mo Isotopic Records Imply Persistent Ocean Oxygenation in the Deep Southwest Pacific During the Early Cenozoic Warming Period
文献类型：期刊论文
| 作者 | Liu, Xiaowen2,3; Sun, Xiaole1,3; Huang, Yi2; Sun, Weidong1,3; Li, Yuchen1,3; Hao, Yufei1,3; Wu, Sifan1,3; Li, Le1,3; Huang, Jing1,3 |
| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 出版日期 | 2026-01-24 |
| 卷号 | 53期号:2页码:9 |
| 关键词 | molybdenum isotopes ocean oxygenation early Cenozoic southern ocean ventilation continental weathering |
| ISSN号 | 0094-8276 |
| DOI | 10.1029/2025GL119743 |
| 通讯作者 | Huang, Jing(hjmail@qdio.ac.cn) |
| 英文摘要 | During the early Cenozoic greenhouse period, counterintuitive contractions in tropical Pacific oxygen-deficient zones have been linked to enhanced deep-ocean ventilation, yet direct geological evidence remains limited. Here we present molybdenum (Mo) isotopic records from International Ocean Discovery Program Site U1509. Raman spectroscopy shows that Mn and Fe occur mainly as MnO2 and Fe-Mn oxides. The delta 98/95Mo values show a sustained negative shift from similar to 1 parts per thousand to -2 parts per thousand between similar to 59.5 and 50.5 Ma, and this trend is best explained by strengthened Mo adsorption onto Mn and Fe bearing oxides at the sediment-water interface. This mechanism provides a direct basis for interpreting the Mo isotope depletion, indicating prolonged bottom-water oxygenation within early Cenozoic greenhouse conditions. At similar to 50.5 Ma, a sharp decline in silicate epsilon Nd values and coeval rises in Ti, Zr, and Sc enrichment factors indicate intensified continental weathering that supplied isotopically light Mo. These results provide new constraints on early Cenozoic redox evolution. |
| WOS关键词 | MOLYBDENUM ; FRACTIONATION ; ADSORPTION ; SUBDUCTION ; SEDIMENTS ; CLIMATE ; ANOXIA ; OXIDES ; MA |
| 资助项目 | National Natural Science Foundation of China[42221005] ; National Key Research and Development Program of China[2023YFF0807102] ; Taishan Scholar Foundation of Shandong Province[tspd20230609] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001703658200001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/204859]  |
| 专题 | 海洋研究所_深海极端环境与生命过程研究中心 |
| 通讯作者 | Huang, Jing |
| 作者单位 | 1.Laoshan Lab, Ocean Sci & Interdisciplinary Frontiers, Qingdao, Peoples R China 2.Chengdu Univ Technol, Coll Ecol & Environm, State Key Lab Geohazard Prevent & Geoenvironm Prot, Chengdu, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Xiaowen,Sun, Xiaole,Huang, Yi,et al. Mo Isotopic Records Imply Persistent Ocean Oxygenation in the Deep Southwest Pacific During the Early Cenozoic Warming Period[J]. GEOPHYSICAL RESEARCH LETTERS,2026,53(2):9. |
| APA | Liu, Xiaowen.,Sun, Xiaole.,Huang, Yi.,Sun, Weidong.,Li, Yuchen.,...&Huang, Jing.(2026).Mo Isotopic Records Imply Persistent Ocean Oxygenation in the Deep Southwest Pacific During the Early Cenozoic Warming Period.GEOPHYSICAL RESEARCH LETTERS,53(2),9. |
| MLA | Liu, Xiaowen,et al."Mo Isotopic Records Imply Persistent Ocean Oxygenation in the Deep Southwest Pacific During the Early Cenozoic Warming Period".GEOPHYSICAL RESEARCH LETTERS 53.2(2026):9. |
入库方式： OAI收割
来源：海洋研究所
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