| 摘要: |
| 自1988年以来，通过多次野外考察和深入研究，在黄河口发现并确认存在大规模的水下滑坡体系。根据声纳图象和浅地层创面记录，对滑坡进行分类命名和特征分析。研究表明，该滑坡体系中存在瓶颈状滑坡、平移板状滑坡和旋转滑坡3种类型；许多单个滑坡在下坡方向汇集成复会滑坡系统，有时数十条滑坡汇集成境蜒数公里的大规模复杂体系。滑坡冲沟分布广泛，将底坡表层切割得支离破碎，与密西西比河口比较，黄河口水下滑坡具有高含水、浅表多发、微型多样、搬运机制清楚、滑坡全部呈负地形、分布广泛等特点，对形成黄河口及水下三角洲的特点及其发育演化有重要作用。滑坡沉积物各阶段存在不同的流变组合，构成完整的流谱。河口底被沉积物向海洋的输送具有阵发性和事件性。 |
| 关键词: 黄河口水下底坡 滑坡分类和体系 冲沟 前缘隆起裾 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金重大项目，9487005号 |
附件 |
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| SUBAQUEOUS LANDSLIDE SYSTEM IN THE HUANGHE RIVER (YELLOW RIVER) DELTA |
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Yang Zuosheng, Chen Weimin, Chen Zhangrong, Wu Guanghua, Cao Lihua, Shen Weiquan
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Institute of Estuarine & Coastal Studies, Ocean University of Qingdao, Qingdao 266003
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| Abstract: |
| Large scale subaqueous landslide system was found and recognized in the subaqueous Huanghe River (Yellow River) Delta through several field surveys since 1988. Bottleneck slides, translational plate slides and rotational slides were identified and described based on sidescan sonar images and subbottom profile records. Many individual landslides merge with each other along their way down to the delta slope, forming complexes of landslides. Sometimes several tens of slides come down seaward to the end of the delta slope and gradually join together into a common, elongate, chute gully of several kilometers at the lower part of the delta front slope, forming a complicated landslide system. The landslides cut the slope surface into broken pieces with their chute gullies. Many depositional lobes formed by very diluted debris flows were found. The sediments coming out from the lower end of the gullies generate a delta front apron.
In comparison with the subaqueous landslides in the Mississippi Delta, the Huanghe River case is characterized by high water content, shallow disturbance, multiactivization, minitype, variety in morphology, clear 3-dimensional geometry, distinct transport mechanism, wholly negative topography, etc.. The landslides play an important role in the evolution of the Huanghe River Estuary and its Delta. |
| Key words: Huanghe River Delta subaqueous slope, Types and system of landslides, Lobes of debris flow, Front slope apron |
