Geochemistry of core sediments along the Active Channel, northeastern Indian Ocean over the past 50,000 years: Sources and climatic implications
文献类型：期刊论文
| 作者 | Liu, Jianguo2; Shi, Xuefa1,2; Liu, Shengfa1,2; He, Wei3; Cao, Li3; Xiang, Rong; Zhu, Zhu3 |
| 刊名 | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
 |
| 出版日期 | 2019 |
| 卷号 | 521页码:151 |
| 关键词 | Major elements Rare earth elements Sediment provenance Chemical weathering Last glacial maximum Bengal Fan |
| ISSN号 | 0031-0182 |
| DOI | 10.1016/j.palaeo.2019.02.021 |
| 英文摘要 | Major and trace elements of sediments from two gravity cores (10YDY09 and 12I712) in the northeastern Indian Ocean have been analyzed for sediment provenance and the relationship of the sediments with climate change since 50 ka. The rare earth element (REE) compositions were analyzed, and the sediment contributions were estimated for the major potential sources, including the Ganges-Brahmaputra (G-B), Godavari-Krishna (G-K) and Mahanadi Rivers. Our results showed that the sediments in the study area were a mixture of sediments discharged from the above three rivers. The sediment contribution of the G-K Rivers increased notably during the Holocene when the rainfall increased, which may be caused by the strengthening of the East Indian Coastal Current (EICC) and the resulting large amounts of sediments supplied by the G-K Rivers. The higher sediment contribution from the G-B Rivers demonstrated the role of the Active Channel in transporting sediments to the distal Bengal Fan. During the last glacial maximum (LGM), especially in the late period, the Indian summer monsoon weakened, but the winter monsoon strengthened, resulting in a decrease in chemical weathering and elemental enrichment in the northeastern Indian Ocean. Conversely, when the rainfall was low, the chemical weathering strengthened and K2O/TiO2 ratios were lowered due to the longer weathering time and resulting sediment potassium loss. However, when the sea level reached a certain height during the Holocene, the fluvial sediments could not easily enter deep-water environments through submarine channels, which were well developed in the Bengal Fan. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/17964]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 4.SOA, First Inst Oceanog, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Jianguo,Shi, Xuefa,Liu, Shengfa,et al. Geochemistry of core sediments along the Active Channel, northeastern Indian Ocean over the past 50,000 years: Sources and climatic implications[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2019,521:151, 160. |
| APA | Liu, Jianguo.,Shi, Xuefa.,Liu, Shengfa.,He, Wei.,Cao, Li.,...&Zhu, Zhu.(2019).Geochemistry of core sediments along the Active Channel, northeastern Indian Ocean over the past 50,000 years: Sources and climatic implications.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,521,151. |
| MLA | Liu, Jianguo,et al."Geochemistry of core sediments along the Active Channel, northeastern Indian Ocean over the past 50,000 years: Sources and climatic implications".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 521(2019):151. |
入库方式： OAI收割
来源：南海海洋研究所
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