| 摘要: |
| 通过对80年代以来黄、渤海陆架地质调查有关柱状岩芯资料的分析研究，以地层年代为依据，划分晚更新世与全新世地层。研究结果表明，未次冰期低海面时期，黄、渤海陆架沉积物受到来自北方于冷气流的作用，形成独特的分布格局，陆架沉积物的综合特征反映出晚更新世末期黄、渤海陆架曾经发生过沙漠化，并形成一系列的风沙沉积。根据沉积物的分布特征和拉度组成将黄、渤海陆架划分为6个沉积区域和4种主要沉积类型。 |
| 关键词: 晚更新世 陆架 沙漠化 衍生沉积 沉积特征 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金!49070266 |
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| THE YELLOW SEA AND BOHAI SEA SHELF SEDIMENT DISTRIBUTION PATTERN AND SEDIMENTATION CHARACTERISTICS IN THE LAST STAGE OF LATE PLEISTOCENE |
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Zhang Minghan
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Institute of Oceanology, Academia Sinica, Qingdao 266071
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| Abstract: |
| Based on the geological surveys of the Yellow Sea and Bohai Sea shelf since 1980s, this study of the sediment distribution pattern and sedimentation characteristics during the low sea-level period in the last stage of late Pleistocene revealed the sediment types and grain sizes. The sediment distribution pattern and the lithological characteristics divide the Yellow Sea and Bohai Sea shelf into six regions of shelf sediments: The shallow sea around the Shandong Peninsula; The middle part of the southern Yellow Sea; The southern part of the southern Yellow Sea; The eastern part of the southern Yellow Sea; The eastern part of the northern Yellow Sea; The region of the Bohai Sea.
The horizontal and vertical distributions of the sediments reflect the dispersing action of the shelf sediments that were blown by the cold north winds under the dry and cold climate in the last stage of late Pleistocene. The sediment distribution pattern and the sedimentation characteristics showed that the shelf of the Yellow Sea and Bohai Sea underwent desertization and formed a series of derivative sediments. |
| Key words: Late Pleistocene, Shelf, Desertization, Derivative sediments, Sedimentation characteristic |
