波罗的海南部海岸观测到的全新世屏障海岸演变的驱动力和决定因素

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
P. Sydor, S. Uścinowicz
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引用次数: 1

摘要

海岸屏障约占世界海岸线的八分之一。屏障是波罗的海南部地区最常见的地貌类型。尽管研究历史悠久,但障壁海岸演变的问题仍未得到解决。本研究的主题是确定障壁海岸在全新世进化的条件,并解释其发展的当地不同历史。在波美拉尼亚湾东部(波罗的海南部)一段35公里长的沿海地区,利用钻孔、地震声学和探地雷达剖面、放射性碳和OSL测年、生物地层学研究和岩性分析进行了勘探。确定了三大类沉积物:屏障底土沉积物、屏障沉积物(海相和风成砂以及丘间泥炭)和雷加河三角洲沉积物。在北格里普纪早期(~8000年b2k),海岸线位于其现在位置的北部约2至12公里处。在2000年8000-6000年期间,海岸线向南(向陆地)迁移,最初的速度高达22米/年,后来达到2米/年。当时的主要驱动力是气候变暖和海平面迅速上升。全新世海侵结束后,研究区障壁海岸发育经历了三种不同的历史:仍是海侵的障壁、由海侵演化到退积的障壁和由海侵槽退积演化到再海侵的障壁。这些不同历史的主要决定因素是屏障底土(可容纳空间)的岩性和起伏程度,以及屏障形成所需的含沙量随时间的变化,这些因素在研究区不同地区有所不同。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Driving forces and determinants of barrier coast evolution in the Holocene observed on the southern coast of the Baltic Sea
Coastal barriers account for approximately one-eighth of the world’s coastline. Barriers are the most common landform type in the southern part of the Baltic Sea area. Despite the long history of research, the issue of barrier coast evolution remains unresolved. The topic of this research is to determine the conditions under which the barrier coast evolved in the Holocene and to explain the local, different histories of its development. A 35 km long stretch of the coastal zone in the eastern Pomeranian Bay (southern Baltic) was explored using boreholes, seismoacoustic and GPR profiling, as well as radiocarbon and OSL dating, biostratigraphic studies and lithological analysis. Three main groups of deposits were identified: barrier subsoil deposits, barrier deposits (marine and aeolian sand, as well as interdune peat) and Rega River delta deposits. In the early Northgrippian (~8000 yr b2k), the coastline was located from about 2 to 12 km north of its present position. In the period 8000–6000 yr b2k, the coastline migrated southwards (landwards), initially at a rate of up to 22 m/yr and later up to 2 m/yr. The main driving forces at that time were climate warming and rapid sea level rise. When the Holocene transgression ceased, there were three different histories of the barrier coast development in the study area: a barrier that was still transgressive, a barrier that evolved from transgressive to progradational, and a barrier that evolved from transgressive trough progradational to transgressive again. The main determinants of these different histories were the lithology and relief of the barrier subsoil (accommodation space) and the time-varying amount of sand available for barrier formation, which varied in different parts of the study area.
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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