Provenance shift of the abyssal plains in the Southwest sub-basin of the South China Sea at 8 Ma: Tectonics & climate changes implication
文献类型：期刊论文
| 作者 | Yan, Yi7,8,9; Liu, Lan6,9; Clift, Peter D.4,5; Dilek, Yildirim2,3; He, Anbei1 |
| 刊名 | MARINE GEOLOGY
 |
| 出版日期 | 2024-09-01 |
| 卷号 | 475页码:13 |
| 关键词 | South China Sea Provenance shift Tibet Plateau Southwest sub-basin Sr-Nd isotopes Zircon U - Pb dating |
| ISSN号 | 0025-3227 |
| DOI | 10.1016/j.margeo.2024.107368 |
| 英文摘要 | Tectonic processes and climatic changes are recognized as two major drivers of erosion along the southeastern margin of the Tibetan Plateau and consequently are the main factors controlling depositional patterns along the margins of the South China Sea. However, the role of tectonics and climate in governing the types and patterns of sedimentation in the abyssal plains is relatively little known. The results of International Ocean Discovery Program (IODP) drilling in the abyssal plains of the Southwest sub-basin of the South China Sea show that the multi-trace element and rare earth element (REE) character of sediments older than 8 Ma are in disorder. 8Nd (0) and 87Sr/86Sr values exhibit large fluctuations, which implies temporally variable sediment sources during the early post-spreading stage of the South China Sea. High 8Nd(0) and low 87Sr/86Sr values and abundant Cenozoic (13-35 Ma) zircon grains in the sediments suggest relatively juvenile sources for their origins, such as the Cagayan Ridge and Palawan Block in the south before 8 Ma. Multi-trace element and REE patterns of sediments younger than 8 Ma are more uniform. Low 8Nd(0) and high 87Sr/86Sr values of the sediments indicate that more continentally-derived sediments were transported to the abyssal plain. Coastal rivers in SE Vietnam, and the Mekong and Red Rivers in the west gradually became the major detrital sources of abyssal sediments in the Southwest sub-basin after 8 Ma. The switching of the sediment sources from the south to the west is consistent with the progressive uplift of the Vietnamese Central Highlands (VCH) and the SE Tibetan Plateau margin during the Late Miocene. The strengthened summer monsoon since 5 Ma affected not only the marginal basins, but also the deep abyssal basins. We argue that the regional tectonics shaped and controlled the shift of provenance and sediment routing system, whereas the East Asian monsoon affected the sediment flux to the abyssal plains of the Southwest sub-basin in the South China Sea. |
| WOS研究方向 | Geology ; Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:001291204800001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80550]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Yan, Yi |
| 作者单位 | 1.Yunnan Normal Univ, Fac Geog, Kunming 650500, Peoples R China 2.Univ Coll Cork, Sch Biol Earth & Environm Sci, Cork T23 N73K, Ireland 3.Miami Univ, Dept Geol & Environm Earth Sci, Oxford, OH 45056 USA 4.Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA 5.UCL, Dept Earth Sci, London WC1E 6BS, England 6.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 7.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510640, Peoples R China 8.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 9.Chinese Acad Sci, Guangzhou Inst Geochem, Lab Isotope Geochem, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Yi,Liu, Lan,Clift, Peter D.,et al. Provenance shift of the abyssal plains in the Southwest sub-basin of the South China Sea at 8 Ma: Tectonics & climate changes implication[J]. MARINE GEOLOGY,2024,475:13. |
| APA | Yan, Yi,Liu, Lan,Clift, Peter D.,Dilek, Yildirim,&He, Anbei.(2024).Provenance shift of the abyssal plains in the Southwest sub-basin of the South China Sea at 8 Ma: Tectonics & climate changes implication.MARINE GEOLOGY,475,13. |
| MLA | Yan, Yi,et al."Provenance shift of the abyssal plains in the Southwest sub-basin of the South China Sea at 8 Ma: Tectonics & climate changes implication".MARINE GEOLOGY 475(2024):13. |
入库方式： OAI收割
来源：广州地球化学研究所
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