| 胶州湾口潮流沙脊特征 |
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| 引用本文： | 吴承强, 许艳, 鲍晶晶. 胶州湾口潮流沙脊特征[J]. 海洋地质前沿, 2014, 30(6): 1-6. |
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| 作者姓名： | 吴承强, 许艳, 鲍晶晶 |
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| 作者单位： | 1 国家海洋局第三海洋研究所, 厦门 361005;; 2 国家海洋信息中心, 天津 300171;; 3 厦门海洋工程勘察设计研究院, 厦门 361005 |
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| 基金项目： | 国家自然科学基金“扬子浅滩南部地形地貌精细研究及成因机制分析”（41276058）;海洋公益性项目“东沙群岛北部海域地形特征命名示范应用研究”（201205004-4）;省部级重大专项调查“我国近海海底地形地貌调查研究”（908-ZC-I-07） |
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| 摘 要： | 胶州湾内外的涨、落潮三角洲上发育有一定规模的潮流沙脊体系,通过多波束调查采集数据和浅剖、沉积物资料的分析,对沙脊特征进行了研究。湾内涨潮三角洲上分别分布有冒岛沙脊、中央沙脊和岛耳河沙脊;湾外落潮三角洲上分别发育了潮流沙脊大竹、南沙、北沙和位于主潮流通道末端的弧状沙脊。潮流沙脊体系的演变具有较为明显的继承性。沙脊以海侵时期发育的沙体为内核,沉积物组成以粒度较粗的砂质沉积物为主,物源基础为低海平面时期胶州湾盆地内堆积的河流三角洲相沉积物。据分析,沙脊现代物源较为匮乏,整体目前处于冲刷不淤的状态。在现代潮流水动力条件下,研究区潮流沙脊处于活动状态。
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| 关 键 词： | 胶州湾口 潮流沙脊 涨潮三角洲 落潮三角洲 |
| 收稿时间： | 2014-03-18 |
THE CHARACTERISTICS OF TIDAL SAND RIDGES IN THE MOUTH OF JIAOZHOU BAY,SHANDONG, CHINA |
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| WU Chengqiang, XU Yan, BAO Jingjing. THE CHARACTERISTICS OF TIDAL SAND RIDGES IN THE MOUTH OF JIAOZHOU BAY, SHANDONG, CHINA[J]. Marine Geology Frontiers, 2014, 30(6): 1-6. |
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| Authors: | WU Chengqiang XU Yan BAO Jingjing |
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| Affiliation: | 1 Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China;; 2 Oceanic Information Centre of Oceanography, State Oceanic Administration, Tianjin 300171, China;; 3 Xiamen Ocean Engineering Survey and Design Institute, Xiamen 361005, China |
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| Abstract: | Submarine tidal ridges on certain scale occur on both the flood and ebb tidal deltas inside and outside the Jiaozhou Bay mouth. Multi-beam acoustic sounding, sub-bottom profiling and sediment analysis are conducted for study of the characteristics of the tidal sand ridges. The Maodao sand ridge, Zhongyang sand ridge and Daoer River sand ridge occur on the flood tidal delta inside the Jiaozhou Bay mouth, whereas the Dazhu sand ridge, Nansha sand ridge, Beisha sand ridge and the arc-shaped sand ridges occur on the ebb tidal delta outside the Jiaozhou Bay mouth. The sand ridges are developed as the continuation of the sand cores which were formed in the Holocene transgression. The sand ridges are mainly composed of coarse sands. Our data suggests that the sands of tidal sand ridges are primarily from estuarine sandy shoals during the period of low sea-level. They are still active now according to the study of the recent marine hydrodynamics. They are growing slowly due to the deficiency of sediment input and strong erosion. |
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| Keywords: | Jiaozhou Bay Entrance tidal sand ridges flood tidal delta ebb tidal delta |
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