Structures within the oceanic crust of the central South China Sea basin and their implications for oceanic accretionary processes
文献类型：期刊论文
| 作者 | Li, JB; Ding, WW; Sun, Z; Dadd, K; Fang, YX |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2018 |
| 卷号 | 488页码:115-125 |
| 通讯作者 | wwding@sio.org.cn |
| 中文摘要 | Internal structures in mature oceanic crust can elucidate understanding of the processes and mechanism of crustal accretion. In this study, we present two multi-channel seismic (MCS) transects across the northern flank of the South China Sea basin to reveal the internal structures related to Cenozoic tectono-magmatic processes during seafloor spreading. Bright reflectors within the oceanic crust, including the Moho, upper crustal reflectors, and lower crustal reflectors, are clearly imaged in these two transects. The Moho reflection displays varied character in continuity, shape and amplitude from the continental slope area to the abyssal basin, and becomes absent in the central part of the basin where abundant seamounts and seamount chains formed after the cessation of seafloor spreading. Dipping reflectors are distinct in most parts of the MCS data but generally confined to the lower crust above the Moho reflection. These lower crustal reflectors merge downward into the Moho without offsetting it, probably arising from shear zones between the crust and mantle characterized by interstitial melt, although we cannot exclude other possibilities such as brittle faulting or magmatic layering in the local area. A notable feature of these lower crustal reflector events is their opposite inclinations. We suggest the two groups of conjugate lower crustal reflector events observed between magnetic anomalies C11 and C8 were associated with two unusual accretionary processes arising from plate reorganizations with southward ridge jumps. (C) 2018 The Author(s). Published by Elsevier B.V. |
| 学科主题 | Geochemistry & Geophysics |
| 关键词[WOS] | Moho reflection ; lower crustal reflectors ; southward ridge jump ; oceanic accretionary processes ; South China Sea |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/17139]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 推荐引用方式 GB/T 7714 | Li, JB,Ding, WW,Sun, Z,et al. Structures within the oceanic crust of the central South China Sea basin and their implications for oceanic accretionary processes[J]. EARTH AND PLANETARY SCIENCE LETTERS,2018,488:115-125. |
| APA | Li, JB,Ding, WW,Sun, Z,Dadd, K,&Fang, YX.(2018).Structures within the oceanic crust of the central South China Sea basin and their implications for oceanic accretionary processes.EARTH AND PLANETARY SCIENCE LETTERS,488,115-125. |
| MLA | Li, JB,et al."Structures within the oceanic crust of the central South China Sea basin and their implications for oceanic accretionary processes".EARTH AND PLANETARY SCIENCE LETTERS 488(2018):115-125. |
入库方式： OAI收割
来源：南海海洋研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。