| Sedimentary evolution in the northern slope of South China Sea since Oligocene and its responses to tectonics | |
| Li An-Chun1; Huang Jie1,2; Jiang Heng-Yi1,2; Wan Shi-Ming1; Li, AC (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China | |
| 2011-12-01 | |
| 发表期刊 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| ISSN | 0001-5733 |
| 卷号 | 54期号:12页码:3233-3245 |
| 文章类型 | Article |
| 摘要 | We here reconstruct the sedimentary evolution of South China Sea since Oligocene using samples from Ocean Drilling Program (ODP) site 1148 in the northern South China Sea based on a multi-proxy approach including monomineralic quartz oxygen isotope ratios or (delta(18) O), grain-size of isolated terrigenous materials, terrigenous mineral accumulation rate and SEM analysis of isolated quartz. It was found that the sedimentary evolution of South China Sea Basin could be divided into five stages: period of initial expansion (34 similar to 28. 5 Ma), period of intense tectonic activity (28. 5 similar to 23 Ma), period of reduced tectonic activity (23 similar to 16. 5 Ma), period of thermal subsidence ( 16. 5 similar to 3. 5 Ma) and period of Taiwan uplift (3. 5 Ma to present). Terrigenous mineral composition and oxygen isotope values of quartz altered significantly during 28. 5 similar to 23 Ma which was the period of provenance transition, corresponding to the most active period of South China Sea since Oligocene. Sediment source of ODP Site 1148 was mainly from Palawan during the early spreading period of South China Sea. With the extensive spreading of South China Sea, especially when the spreading axes of South China Sea jump to south during 25 similar to 23 Ma, Palawan continental block moved away constantly, and the changes in the regional geomorphic change caused by Tibetan Plateau uplift had not spread to Yunnan-Guizhou Plateau and South China, so Southern China mainland in the north had little or no impact on the study area, as a result, terrigenous mass accumulation rate was very low. Subsequently, owing to the rapid uplift of Qinghai-Tibet Plateau, rivers such as Pearl River developed gradually, so did the headward erosion, as a result, South China turned to be the main source of ODP site 1148, and South China Sea converted to distal deposition. With Taiwan Island uplift since 3. 5 Ma, a large amount of terrigenous sediments entered into the northern South China Sea, Taiwan turned to be the major source provenance of the study area. The hiatus of ODP site 1148 in the late Oligocene resulted from the lack of terrigenous material supply, sea level rise and relatively stronger currents during the source transformation.; We here reconstruct the sedimentary evolution of South China Sea since Oligocene using samples from Ocean Drilling Program (ODP) site 1148 in the northern South China Sea based on a multi-proxy approach including monomineralic quartz oxygen isotope ratios or (delta(18) O), grain-size of isolated terrigenous materials, terrigenous mineral accumulation rate and SEM analysis of isolated quartz. It was found that the sedimentary evolution of South China Sea Basin could be divided into five stages: period of initial expansion (34 similar to 28. 5 Ma), period of intense tectonic activity (28. 5 similar to 23 Ma), period of reduced tectonic activity (23 similar to 16. 5 Ma), period of thermal subsidence ( 16. 5 similar to 3. 5 Ma) and period of Taiwan uplift (3. 5 Ma to present). Terrigenous mineral composition and oxygen isotope values of quartz altered significantly during 28. 5 similar to 23 Ma which was the period of provenance transition, corresponding to the most active period of South China Sea since Oligocene. Sediment source of ODP Site 1148 was mainly from Palawan during the early spreading period of South China Sea. With the extensive spreading of South China Sea, especially when the spreading axes of South China Sea jump to south during 25 similar to 23 Ma, Palawan continental block moved away constantly, and the changes in the regional geomorphic change caused by Tibetan Plateau uplift had not spread to Yunnan-Guizhou Plateau and South China, so Southern China mainland in the north had little or no impact on the study area, as a result, terrigenous mass accumulation rate was very low. Subsequently, owing to the rapid uplift of Qinghai-Tibet Plateau, rivers such as Pearl River developed gradually, so did the headward erosion, as a result, South China turned to be the main source of ODP site 1148, and South China Sea converted to distal deposition. With Taiwan Island uplift since 3. 5 Ma, a large amount of terrigenous sediments entered into the northern South China Sea, Taiwan turned to be the major source provenance of the study area. The hiatus of ODP site 1148 in the late Oligocene resulted from the lack of terrigenous material supply, sea level rise and relatively stronger currents during the source transformation. |
| 关键词 | South China Sea Odp Site 1148 Oligocene Oxygen Isotope Ratios Of Quartz Terrigenous Minerals Source Provenance |
| 学科领域 | Geochemistry & Geophysics |
| DOI | 10.3969/j.issn.0001-5733.2011.12.022 |
| URL | 查看原文 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000298906400022 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/11529 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Li, AC (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Li An-Chun,Huang Jie,Jiang Heng-Yi,et al. Sedimentary evolution in the northern slope of South China Sea since Oligocene and its responses to tectonics[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2011,54(12):3233-3245. |
| APA | Li An-Chun,Huang Jie,Jiang Heng-Yi,Wan Shi-Ming,&Li, AC .(2011).Sedimentary evolution in the northern slope of South China Sea since Oligocene and its responses to tectonics.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,54(12),3233-3245. |
| MLA | Li An-Chun,et al."Sedimentary evolution in the northern slope of South China Sea since Oligocene and its responses to tectonics".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 54.12(2011):3233-3245. |
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