山东半岛成山角海域潮流沙脊的初步研究

Preliminary study on the tidal sand ridge in Chengshanjiao sea area of Shandong peninsula

根据侧扫声纳和浅地层剖面资料对成山角海驴岛附近典型剖面进行了分析研究。该剖面水深地形变化较大,发育有海蚀平台、冲蚀沟、残余地貌、潮流沙脊等地貌类型。分析讨论了潮流沙脊的形态和沉积特征、发育过程,并对潮流沙脊的物质来源、形成的水动力条件和形成时代进行了初步的研究。潮流沙脊为侵蚀-堆积型沙脊,由强潮流侵蚀近岸基岩经搬运、改造、再沉积后形成。潮流沙脊形成于全新世中期海平面相对稳定时期。

Analysis and research are made on the typical profile nearby Hailv Island of Chengshanjiao, according to the side scan sonar and sub-bottom profiler data. The soundings and topography vary hardly. The eroded platform, eroded channel,remnant topography and tidal sand ridge grow up on this profile. This paper discusses the configuration, sediment characteristics and upgrowth process of the tidal sand ridge, and it studies the formation condition and formation age of tidal sand ridges. The tidal sand ridge belongs to eroded-deposited sand ridge, which has been transmitted, rebuilt and redeposited after strong currents eroding the bedrock offshore. The tidal sand ridge formed in themid-Holocence, when the sea level was comparatively stable.