Holocene sea-level changes and glacio-isostasy in the Gulf of Finland,Baltic Sea
Holocene sea-level changes and glacio-isostasy in the Gulf of Finland,Baltic Sea
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波罗的海芬兰湾全新世海平面变化与冰川均衡
DOI：
10.1016/j.quaint.2004.01.009
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发表时间：
2004
影响因子：
2.2
通讯作者：
A. Miettinen
中科院分区：
文献类型：
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作者：
A. Miettinen
在过去的9000放射性碳年芬兰湾东部的海岸线位移重建研究了10个孤立的湖泊和沼泽盆地位于Virolahti在芬兰东南部和卡累利阿地峡，并在Ingermanland在俄罗斯。研究方法是硅藻分析、沉积物岩石地层学解释和放射性碳测年。在芬兰东南部，海侵（Litorina）最大发生在约。6500- 620014 C年BP（7400- 7100年BP校准）。在卡累利阿地峡和英格尔曼地的陆地抬升速率较慢的地区，海侵最大值发生在约1000年。6400- 600014 C年BP（7300- 6800年BP）。最高的Litorina海岸线位于CA。在芬兰东南部，海拔23米，而在卡累利阿地峡的东部，靠近圣彼得堡，它位于约200米。海拔800米。Virolahti地区的Litorina海侵幅度约为1000 m。4米，而在卡累利阿地峡和Ingermanland的振幅在5和7米之间变化。地区之间的区域差异完全是由于不同的冰川均衡陆地抬升速率造成的。在这项研究中研究的七个盆地连接到波罗的海盆地在Litorina海阶段和他们的硅藻和岩石地层记录表明一个单一的，顺利的Litorina海侵。
Shoreline displacement in the eastern part of the Gulf of Finland during the past 9000 radiocarbon years was reconstructed by studying a total of 10 isolated lake and mire basins located in Virolahti in southeastern Finland and on the Karelian Isthmus, and in Ingermanland in Russia. Study methods were diatom analyses, sediment lithostratigraphical interpretation and radiocarbon dating. In southeastern Finland, the marine (Litorina) transgression maximum occurred ca. 6500–620014C yr BP (7400–7100cal.yr BP). In areas of the slower land uplift rate on the Karelian Isthmus and in Ingermanland, the transgression maximum occurred ca. 6400–600014C yr BP (7300–6800cal.yr BP). The highest Litorina shoreline is located at ca. 23m above present sea-level in southeastern Finland, whereas in the eastern part of the Karelian Isthmus, near St. Petersburg, it is located at ca. 8m above present sea-level. The amplitude of the Litorina transgression in Virolahti area is ca. 4m, whereas on the Karelian Isthmus and in Ingermanland the amplitude has varied between 5 and 7m. The regional differences between areas are solely due to different glacio-isostatic land uplift rates. The seven basins studied in this research were connected to the Baltic Sea basin during the Litorina Sea stage and their diatom and lithostratigraphical records indicate a single, smooth Litorina transgression.