| Development of the East Asian summer monsoon: Evidence from the sediment record in the South China Sea since 8.5 Ma | |
| Wan, Shiming; Li, Anchun; Clift, Peter D.; Jiang, Hengyi | |
| 2006-11-01 | |
| 发表期刊 | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
 |
| ISSN | 0031-0182 |
| 卷号 | 241期号:1页码:139-159 |
| 文章类型 | Article |
| 摘要 | 128 samples from Ocean Drilling Program (ODP) Site 1143 in the southern South China Sea were analyzed for grain size, clay minerals, biogenic opal content and quartz in order to reconstruct changes in East Asian monsoon climate since 8.5 Ma. An abrupt change of terrigenous mass accumulation rate (MAR), clay mineral assemblage, median grain size and biogenic opal MAR about 5.2 Ma suggests that between 8.5-5.2 Ma the source of terrigenous sediment was mainly in the region of surface uplift and basaltic volcanism in southern Vietnam. A simple model of East Asian summer monsoon evolution was based on the clay/feldspar ratio, kaolinite/chlorite ratio and biogenic opal MAR. The summer monsoon has two periods of maximum strength at 8.5-7.6 Ma and 7.1-6.2 Ma. Subsequently, there was a relatively stable period at 6.2-3.5 Ma, continued intensification about 3.5-2.5 Ma, and gradually weakening after 2.5 Ma. Since I Ma the monsoon has intensified, with remarkable high-frequency and amplitude variability. Simultaneous increase in sedimentation rates at ODP Sites 1143, 1146 and 1148, as well as in MAR of terrigenous materials, quartz, feldspar and clay minerals at ODP Site 1143 at 3.5-2.5 Ma, may be the erosional response to both global climatic deterioration and the strengthening of the East Asian summer monsoon after about 3-4 Ma. (c) 2006 Elsevier B.V. All rights reserved.; 128 samples from Ocean Drilling Program (ODP) Site 1143 in the southern South China Sea were analyzed for grain size, clay minerals, biogenic opal content and quartz in order to reconstruct changes in East Asian monsoon climate since 8.5 Ma. An abrupt change of terrigenous mass accumulation rate (MAR), clay mineral assemblage, median grain size and biogenic opal MAR about 5.2 Ma suggests that between 8.5-5.2 Ma the source of terrigenous sediment was mainly in the region of surface uplift and basaltic volcanism in southern Vietnam. A simple model of East Asian summer monsoon evolution was based on the clay/feldspar ratio, kaolinite/chlorite ratio and biogenic opal MAR. The summer monsoon has two periods of maximum strength at 8.5-7.6 Ma and 7.1-6.2 Ma. Subsequently, there was a relatively stable period at 6.2-3.5 Ma, continued intensification about 3.5-2.5 Ma, and gradually weakening after 2.5 Ma. Since I Ma the monsoon has intensified, with remarkable high-frequency and amplitude variability. Simultaneous increase in sedimentation rates at ODP Sites 1143, 1146 and 1148, as well as in MAR of terrigenous materials, quartz, feldspar and clay minerals at ODP Site 1143 at 3.5-2.5 Ma, may be the erosional response to both global climatic deterioration and the strengthening of the East Asian summer monsoon after about 3-4 Ma. (c) 2006 Elsevier B.V. All rights reserved. |
| 关键词 | East Asian Monsoon South China Sea Tibetan Plateau Mineral Composition Odp Leg 184 |
| 学科领域 | Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology |
| DOI | 10.1016/j.palaeo.2006.06.013 |
| URL | 查看原文 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000242001100012 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/5132 |
| 专题 | 海洋地质与环境重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Univ Aberdeen, Kings Coll, Sch Geosci, Aberdeen AB24 3UE, Scotland |
| 推荐引用方式 GB/T 7714 | Wan, Shiming,Li, Anchun,Clift, Peter D.,et al. Development of the East Asian summer monsoon: Evidence from the sediment record in the South China Sea since 8.5 Ma[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2006,241(1):139-159. |
| APA | Wan, Shiming,Li, Anchun,Clift, Peter D.,&Jiang, Hengyi.(2006).Development of the East Asian summer monsoon: Evidence from the sediment record in the South China Sea since 8.5 Ma.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,241(1),139-159. |
| MLA | Wan, Shiming,et al."Development of the East Asian summer monsoon: Evidence from the sediment record in the South China Sea since 8.5 Ma".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 241.1(2006):139-159. |
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