Mixed Carbonate-Siliciclastic Deposits in a Channel Complex in the Northern South China Sea
文献类型：CNKI期刊论文
| 作者 | Benjun Ma ; Shiguo Wu; Lijun Mi; Thomas Lüdmann; Jinwei Gao; Wei Gao
|
| 发表日期 | 2018-06-15 |
| 出处 | Journal of Earth Science
 |
| 关键词 | submarine channels mixed carbonate-siliciclastic deposits allochthonous carbonate sediment flux sedimentology South China Sea |
| 英文摘要 | New high-resolution 3D seismic data image a submarine channel complex in the northern slope of the South China Sea.The channel complex stretches hundreds of kilometers across the slope and flows into the deepsea from the siliciclastic shelf margin,linking neritic environment to the pelagic plain.The evolution of the channel complex developed two sedimentary stages,stage I(19.1–18.5 Ma)and stage II(18.5–17.5 Ma),separated by erosional surfaces.In the first stage,the complex was filled with pure siliciclastic sediments,forming thick-massive sandstone intercalated by thin layers of mudstone.During the stage II,the channel complex was deposited five carbonate-siliciclastic cycles.The unexpected channel-fill carbonate deposits present allochthonous characteristics,suggesting the siliciclastic channel was surprisingly used to transport carbonate sediment from the adjacent neritic carbonate platform.By analyzing the periodical carbonate sedimentary process in the siliciclastic channel complex,we infer that it was related to the in situ carbonate production of the neritic carbonate platform and was most likely to be controlled by the relative sea-level changes.Unlike line-source carbonate slope aprons or small-sized carbonate channels,the large-sized siliciclastic channel complex links directly neritic carbonate platform to deepwater basin and can transport large volumes of neritic carbonates to the pelagic environment in a short period.The new findings help to estimate the contributions of neritic siliciclastic shelf and carbonate platform to deepwater slope more accurately.This study suggests that channel systems are more complex than expected and have significant implications on the conceptual models describing the deepwater sedimentary theory. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | financially supported by the National Basic Research Program of MOST of China (No. 2015CB251201) ; the National Natural Science Foundation of China (Nos. 91228208, 41506055) ; the China Geological Survey (Nos. GZH201400210, DD20160140) |
| 卷 | v.29期:03页:233-246 |
| 语种 | 英文; |
| 分类号 | P744 |
| ISSN号 | 1674-487X |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/188895]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.ShenzhenBranch,ChinaNationalOffshoreOilCorporation 2.KeyLaboratoryofMarineGeologyandEnvironment,InstituteofOceanology,ChineseAcademyofSciences 3.KeyLaboratoryofMarineGeoresourcesandProspecting,InstituteofDeep-seaScienceandEngineering,ChineseAcademyofSciences 4.UniversityofChineseAcademyofSciences 5.FunctionalLaboratoryforMarineGeologyandEnvironment,QingdaoNationalLaboratoryforMarineScienceandTechnology 6.InstituteofGeology,CentreforEarthSystemResearchandSustainability,UniversityofHamburg |
| 推荐引用方式 GB/T 7714 | Benjun Ma,Shiguo Wu,Lijun Mi,et al. Mixed Carbonate-Siliciclastic Deposits in a Channel Complex in the Northern South China Sea. 2018. |
入库方式： OAI收割
来源：海洋研究所
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