Survey report for marine raw material mapping for the Danish Environmental Protection Agency 2022. Inner Danish waters and the Baltic Sea around Bornholm

Research output: Book/ReportReport (publicly available)


GEUS has carried out fieldwork for the Danish Environmental Protection Agency (Miljøstyrelsen, MST) as part of the marine raw material mapping in 2022 in the Inner Danish waters
and Baltic Sea.

The survey started October 22 and was completed November 10 and is hereafter referred to as MST 2022 survey. The MST 2022 survey includes 50 areas of interest widespread throughout the Inner Danish waters and the Baltic Sea. The survey activities were carried out using the survey vessel Fortuna Crane and involved two legs: Leg 1 – geophysical mapping with multibeam echo sounder, side scan sonar, sub-bottom profiler, and shallow single channel seismic; and Leg 2 – sediment sampling by means of vibrocores. In 14 areas only geophysical mapping was carried out, in 27 areas only vibrocores were taken, and in 9 areas both geophysical mapping and vibrocoring were implemented.

Mobilization of the geophysical equipment and vibrocore took place in Hundested harbor from October 19 to October 21. A crew change between Leg 1 and Leg 2 took place in Køge harbor on October 31. Demobilization after the survey took place in Hundested harbor on November 11.

During Leg 1, geophysical mapping was performed in 23 areas where 695 km of geophysical data (out of 699 km planned) were acquired along 249 survey lines. Including turns and connecting lines, 997 km of geophysical data were acquired. Including transit between survey areas, the total sailed length during Leg 1 was 2209 km (excluding unplanned transit from Lyø to Svendborg and back) (Figure 1).

Geophysical data was acquired in Hesselø Bugt, Aarhus Bugt, North of Fyn, Lillebælt, Storebælt, Smålandsfarvandet, Bornholm, Fakse Bugt and Køge Bugt. Details on the survey lines and transits are provided in the survey log included as Appendix A. GAMS calibrationof the positioning system was performed on October 22, while equipment verification test and multibeam patch test was performed on October 29 over the southern slope of the Bakkegrund Syd survey area near Bornholm.

Based on the interpretation of existing seismic data, 77 vibrocore locations were designated in 34 areas by GEUS before the survey. During the survey, an additional 23 vibrocore locations in 19 areas were designated by a GEUS representative for the Danish Environmental Protection Agency on board, based on the newly acquired geophysical data.

Vibrocoring was performed in Køge Bugt, Fakse Bugt, Hjelm Bugt, Femern Bælt, Lillebælt, North of Fyn, Storebælt, Smålandsfarvandet and Grønsund. In total, 53 vibrocores were taken during Leg 2 of the survey (out of 100 planned possible locations) in 36 areas (Figure 2). Details on the vibrocore locations are included in Appendix B.
Original languageEnglish
Place of PublicationCopenhagen
Commissioning bodyDanish Environmental Protection Agency
Number of pages50
Publication statusPublished - 15 Mar 2023

Publication series

SeriesDanmarks og Grønlands Geologiske Undersøgelse Rapport


  • Denmark

Programme Area

  • Programme Area 2: Water Resources


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