Deepwater Canyons Reworked by Bottom Currents:Sedimentary Evolution and Genetic Model
文献类型：CNKI期刊论文
| 作者 | Lv CL(吕彩丽); Yao YJ(姚永坚); Gong YH(龚月华); Wu SG(吴时国); Li XJ(李学杰) |
| 发表日期 | 2012-10-15 |
| 出处 | Journal of Earth Science
 |
| 关键词 | deepwater canyon-channel, bottom current, turbidity current, lateral migration, South China Sea. |
| 英文摘要 | Based on multi-beam bathymetric data and 2D high-resolution, multi-channel seismic profiles, combing ODP1148 drilling data, the morphology, internal sedimentary architecture, and evolution pattern of 17 deepwater canyons from the Middle Miocene to present are documented in the northern Baiyun (白云) sag (BS), Pearl River Mouth basin (PRMB), and northern South China Sea (SCS). There exist six seismic architectural elements in these canyons, including basal erosive surfaces (BES), thalweg deposits (TD), lateral migration packages (LMP), mass transport deposits (MTD), canyon margin deposits (CMD), and drape deposits (DD). According to the stratigraphical ages and geometrical features of these canyons, their formation and evolution processes are divided into three stages:(1) Middle Miocene scouring-filling, (2) Late Miocene lateral migration, and (3) Pliocene-Quaternary vertical overlay. An auto-cyclic progressive process of eroding and filling by turbidity currents results in the scouring-filling and vertical overlay; bottom currents are responsible for the remarkable asym-metry between the two flanks of canyons; and faults are inherent dynamic forces triggering these can yons. It is inferred that these canyons are caused by the double effects of turbidity and bottom currents under the control of faults as inherent dynamic forces. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | supported by the CAS Knowledge Innovation Program of China (No. KZCX2-YW-229) ; the National Natural Science Foundation of China (Nos. 40930845,2009CB219505) |
| 卷 | v.23期:05页:97-109 |
| 语种 | 英文; |
| 分类号 | P736.2 |
| ISSN号 | 1674-487X |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/191101]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.GraduateUniversityofChineseAcademyofSciences 2.KeyLaboratoryofMarineGeology&Environment,InstituteofOceanology,ChineseAcademyofSciences 3.GuangzhouMarineGeologicalSurvey |
| 推荐引用方式 GB/T 7714 | Lv CL,Yao YJ,Gong YH,et al. Deepwater Canyons Reworked by Bottom Currents:Sedimentary Evolution and Genetic Model. 2012. |
入库方式： OAI收割
来源：海洋研究所
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