气候变化领域集成服务门户(CCPortal): Buried late Quaternary channel systems in the Danish North Sea

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DOI	10.1016/j.quascirev.2019.105943
	Buried late Quaternary channel systems in the Danish North Sea – Genesis and geological evolution
	Prins L.T.; Andresen K.J.
发表日期	2019
ISSN	0277-3791
卷号	223
英文摘要	The Danish North Sea has been subject to extensive seismic surveying (both 2D and 3D) during the past four decades. The 3D seismic data from the area has mainly been used for hydrocarbon exploration, but in the last decade, it has also been utilized for investigating the Quaternary sediments and especially buried incised valleys. The erosional and depositional processes involved in forming such valleys are important in paleolandscape reconstruction, but are often difficult to determine, since sediment deposited by flowing water, displays ambiguous geometric structures. In this study, we combine the analysis of infill geometries, from high-resolution 2D seismic data, with plan-view morphology analysis, from 3D seismic data, and lithological data from borehole reports, in order to constrain the origin of buried channels in the Danish North Sea. This data integration makes differentiations of a subaerial vs. subglacial origin more robust. The study focusses on analyzing a proglacial to fluvial channel system, which was initiated as a subglacial tunnel valley system during the Last Glacial Maximum, and subsequently evolved as a fluvial system after deglaciation. The channel system was active in a marsh environment during a period of subaerial exposure in the late Weichselian to early Holocene. During the Holocene transgression, the system was gradually flooded leaving estuarine tidal deposits in the underfilled channels. Once the area was completely flooded, the channel system was buried under marine sands. © 2019 Elsevier Ltd
英文关键词	Doggerland; Geomorphology; North sea; Paleogeography; Quaternary; River valleys; Seismic; Tunnel valleys
语种	英语
scopus关键词	Floods; Geomorphology; Geophysical prospecting; Landforms; Lithology; Petroleum prospecting; Sediments; Seismic response; Seismic waves; Underwater construction; Doggerland; North Sea; Paleogeography; Quaternary; River valley; Seismic; Data integration; borehole; geomorphological response; Holocene; infill; Last Glacial Maximum; paleoceanography; paleogeography; seismic data; subaerial exposure; subglacial deposit; three-dimensional modeling; transgression; valley; Weichselian
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151738
作者单位	SeisLab Aarhus, Department of Geoscience, Aarhus University, Høegh-Guldbergs Gade 2, Aarhus C, 8000, Denmark
推荐引用方式 GB/T 7714	Prins L.T.,Andresen K.J.. Buried late Quaternary channel systems in the Danish North Sea – Genesis and geological evolution[J],2019,223.
APA	Prins L.T.,&Andresen K.J..(2019).Buried late Quaternary channel systems in the Danish North Sea – Genesis and geological evolution.Quaternary Science Reviews,223.
MLA	Prins L.T.,et al."Buried late Quaternary channel systems in the Danish North Sea – Genesis and geological evolution".Quaternary Science Reviews 223(2019).