丹麦地下隧道峡谷及其对地下地质构造的影响

Q2 Earth and Planetary Sciences Geological Survey of Denmark and Greenland Bulletin Pub Date : 2017-07-31 DOI:10.34194/geusb.v38.4388
P. Sandersen, F. Jørgensen
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引用次数: 17

摘要

埋藏的山谷是丹麦地下的细长侵蚀结构,现在部分或完全被较年轻的沉积物填满和覆盖。大部分是由冰盖下的融水形成的。丹麦的埋谷结构数量很大,由于许多地区的山谷填充区拥有大量的地下水资源,因此了解它们及其形成非常重要。这是埋谷测绘项目的起点,该项目始于20世纪90年代末,一直持续到2015年底(Sandersen & Jørgensen 2016)。该项目成为国家地下水测绘计划的一部分,该计划的建立是为了绘制地下水特定利益区域内的地下水资源(Thomsen et al. 2004)。对地下水有特殊兴趣的地区包括现有的集水区,约占全国的40%。在这些地区,高密度电磁测量通常与勘探钻井和补充地球物理测量一起进行。埋藏山谷的地图是根据这些新收集的数据以及国家数据库中的现有数据绘制的。在某些情况下,也可以主要根据钻孔数据,在调查地区以外数据密度较低的地区绘制埋谷图。地下水资源及其脆弱性在潜谷制图中具有重要意义。山谷也是地下地质构造的重要组成部分,很明显,深入了解它们对于全面了解丹麦地下隧道山谷及其对地下地质构造的影响至关重要
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Buried tunnel valleys in Denmark and their impact on the geological architecture of the subsurface
Buried valleys are elongate erosional structures in the Danish subsurface now partly or completely filled and covered with younger sediments. The majority was formed by meltwater underneath ice sheets. The number of buried-valley structures in Denmark is large, and because the valley-infill in many areas hosts significant groundwater resources, knowledge of them and their formation is important. This was the starting point of the buried-valley mapping project, which was initiated in the late 1990s and continued until the end of 2015 (Sandersen & Jørgensen 2016). This project became part of the National Groundwater Mapping Programme which was set up with the purpose of mapping the groundwater resources within areas of specific groundwater interest (Thomsen et al. 2004). The areas of specific groundwater interest encompass existing catchment areas and cover around 40% of the country. Within these areas, high-density electromagnetic surveys have typically been performed together with exploration drilling and supplementary geophysical measurements. The mapping of the buried valleys has been based on these newly collected data as well as existing data in the national databases. In some instances, it has also been possible to map buried valleys in less data-dense areas outside the surveyed areas, mainly on the basis of borehole data. The groundwater resource and its vulnerability have been important in the mapping of the buried valleys. The valleys also constitute an important part of the subsurface geological architecture, and it is obvious that a thorough knowledge of them is critical for the general understandBuried tunnel valleys in Denmark and their impact on the geological architecture of the subsurface
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来源期刊
CiteScore
2.30
自引率
0.00%
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0
审稿时长
>12 weeks
期刊介绍: GEUS Bulletin publishes geoscience research papers, monographs and map descriptions with a focus on Denmark, Greenland and the wider North Atlantic and Arctic region. We welcome submissions that fit this remit. Specifically, we publish: 1.Short articles intended as rapid communications that are of immediate interest to the international geoscience community (these include new research, datasets, methods or reviews) 2.Regular-length articles that document new research or a review of a topic of interest 3.Monographs (single volume works, by arrangement with the editorial office) 4.Maps and descriptive texts (produced by GEUS for Greenland and Denmark, by arrangement with the editorial office) GEUS Bulletin serves a broad geoscientific readership from research, industry, government agencies, NGOs and special interest groups.
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