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北海(North Sea)被现在的大不列颠岛、斯堪的纳维亚半岛、日德兰半岛和荷比低地等围绕,主体是一个自南向北倾斜加深的陆架沉积盆地。随冰后期海面上升,北海南部瓦登海(Wadden Sea)发育了广阔的潮滩海岸。北海南部日德兰半岛西岸Lunden湾古潟湖进行野外调查,利用重力取样器自埋深53 cm始获取了719 cm长的无扰动高取芯率沉积柱LN,并对上部53 cm进行现场观测与分层取样。对沉积柱沉积物结构构造、粒度和烧失量的测试,及沉积物粒度数据的EMMA进行分析。研究表明:这一地区主要保留了河流沉积(EM1)、潮流沉积(EM2)与波浪/风暴沉积(EM3)。早期,波浪/风暴作用为主(EM3)。继而,潮流动力主控(EM2)。随之,河流影响(EM1)不断加强,海洋作用逐渐减弱,乃至消失。与沉积构造和烧失量数据结合,EM3有效揭示了多段风暴沉积物。依据AMS14C测年结果,结合研究区海面变化背景,指示了6050 cal.a BP以来Lunden湾在河—海相互作用下,先后经历了海湾、水下沙坝—潟湖、半封闭沙坝—潟湖和封闭沙坝—潟湖的海退型沙坝—潟湖海岸演化过程,最终在5150cal.a BP发育为滨海湿地。
The North Sea is surrounded by the present Great Britain, the Scandinavian Peninsula, the Jutland and the Hobbit Lowlands, and is dominated by a shelf-sedimentary basin that slopes from south to north. With the rise of the sea surface in the late ice stage, a vast tidal flat coast has developed in the Wadden Sea in the southern North Sea. A field investigation was carried out in the ancient lagoon of Lunden Bay on the west coast of the Jutland Peninsula in the northern North Sea. Using a gravity sampler, a sediment column 719 cm long without disturbance and a high coring rate was obtained from a depth of 53 cm, and the upper 53 cm was observed and divided Layer sampling. The sediment structure of the sediment structure, particle size and loss on ignition test, and sediment particle size data EMMA analysis. The research shows that the main reservoirs of this area are river sediment (EM1), tidal current sediment (EM2) and wave / storm sediment (EM3). Early, wave / storm-based (EM3). Then, the trend of power control (EM2). As a result, the impact of the river (EM1) has been continuously strengthened and the ocean’s role gradually weakened or even disappeared. In combination with sedimentary structure and loss on ignition data, EM3 effectively reveals multi-stage storm deposits. According to the dating results of AMS14C and Lunar Bay under the sea-sea interaction of 6050 cal.a BP in combination with the background of sea surface changes in the study area, the Gulf of Lundan has undergone a series of experiments such as gulf, underwater sand bar - lagoon, semi-enclosed barrage - lagoon and closure Sand dam - Lagoon sea retreat bar - Lagoon coast evolution process, eventually developed in the coastal waters of 5150cal.a BP.