Abstract
In the summer of 2010, the Geological Survey of Denmark and Greenland (GEUS) mapped the potential raw materials and substrate types, over large parts of the Danish economic sector of the North Sea, in cooperation with Orbicon A/S. The mapping was carried out for the Danish Nature Agency; it is part of the general mapping of raw material resources within the territories of the Danish state and forms part of the input for the implementation of the European Union’s Marine Strategy Framework Directive. The purpose was (1) to provide an overview of the distribution, volume and composition of available raw materials and (2) to identify, describe and map the distribution of the dominant marine bottom types.
Highlights
In the summer of 2010, the Geological Survey of Denmark into three phases (Fig. 1, Table 1): phase 1: mapping of both and Greenland (GEUS) mapped the potential raw materials raw materials and bottom types, phase 2: mapping of bottom and substrate types, over large parts of the Danish economic types alone and phase 3: geological mapping
(1) to provide an overview of the distribution, volume and below present sea level interpreted as the offshore continuacomposition of available raw materials and (2) to identify, tion of the Main Stationary Line (MSL) that formed during describe and map the distribution of the dominant marine the last glacial maximum
The crests of the ridges are During the first part of the field work a single beam echo 18–24 m b.s.l. and the troughs around 40 m b.s.l. These large sounder for bathymetrical data, a side scan sonar for map- ridges are interpreted as early Holocene giant tidal sand ridgping the seabed surface as well as a chirp (1–10 kHz) and a es
Summary
The pre-Quaternary surface is close to the seabed in the phase 1 area (Figs 3, 4; Nielsen et al 2008) where it is overlain by a few tens of metres of Quaternary sediments. To a large extent the Weichselian deposits are related to the MSL. They are partly seen as glaciotectonic deformations in the sparker data, and partly as till deposited below and at the margin of the ice sheet. Glaciofluvial sand and gravel are located in depressions in the Weichselian landscape and proximal to distal sandur sediments overlying glacial deposits south of the MSL (Figs 3, 4). Late glacial marine deposits overlie the glacial deposits at present water depths greater than 40 m, which reflects the relative sea level around 17 000 years BP (Leth 1996), shortly after the last deglaciation (Fig. 3).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
