A geotechnical stratigraphy for the shallow subsurface in the Southern Central Graben, North Sea

Prins, Lasse Tésik; Andresen, Katrine Juul

doi:10.1016/j.enggeo.2021.106089

Cited by 13 publications

(16 citation statements)

References 34 publications

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“…These sediments, which are found in the ‘Entenschnabel’ area, are of late Saalian (Coughlan et al . 2018) to pre‐Weichselian (Prins & Andresen 2021) age and correlate with the Upper Fluvial Member of the Saalian Fluvial Formation (Table 4).…”

Section: Discussionmentioning

confidence: 99%

“…The lithological characteristics, tip resistance, thickness and stratigraphic position of units above reworked morainic remnants of the Till Member of the Drenthe Formation are similar to those of the Upper Fluvial Member within the study area. Prins & Andresen (2021) identified the corresponding sediments as their ‘Unit 3’ in a study area close to the ‘Entenschnabel’ in the Danish North Sea sector using seismic and CPT data. These sediments, which are found in the ‘Entenschnabel’ area, are of late Saalian (Coughlan et al .…”

Section: Discussionmentioning

confidence: 99%

“…2014) and as far north as the region of the ‘Entenschnabel’ (Coughlan et al . 2018; Prins & Andresen 2021; Fig. S2).…”

Section: Discussionmentioning

confidence: 99%

“…2005; Coughlan et al . 2018; BSH 2021, Prins & Andresen 2021; Schaumann et al . 2021), the last known glacial ice advance to have reached this area prior to the Holocene inundation (Ehlers 1990).…”

Section: Figmentioning

confidence: 99%

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Stratigraphic and geotechnical characterization of regionally extensive and highly competent shallow sand units in the southern North Sea

Fleischer

Abegunrin

Hepp

et al. 2022

Boreas

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A detailed stratigraphic and geotechnical investigation of the uppermost 50 m below the sea floor was carried out for parts of the German North Sea sector using combined information from shallow seismic reflection surveys, 50‐m‐long sediment cores and cone penetration tests covering an area of ~150 km2. While most recent studies concentrate on unusual features such as buried tunnel‐ or river‐valleys, this study focused on the less well understood, regionally dominant sand units deposited after the retreat of the last glaciers in this region. We identified two sandy units which dominate the late‐ to post‐Saalian geology: (i) the Upper Fluvial Member, believed to be derived from deposition of the Weser, Ems and Elbe palaeorivers as well as other tributaries of the Elbe Palaeovalley in the NE during the Saalian; and (ii) the Aeolian Member, which correlates with periglacial deposits of Weichselian age. Additionally, a Saalian Buried Valley Member believed to comprise fluvial deposit was also identified. Key stratigraphic units within the uppermost 50 m below the sea floor were also identified and mapped. Detailed geotechnical properties were obtained for each of the individual stratigraphic units. The regional extent of the Aeolian and Upper Fluvial Members was documented in the region west of the Elbe Palaeovalley and south of the Dogger Bank, where their geotechnical properties are important for foundation design. In conclusion, the study complements the established regional geotechno‐stratigraphy and offers new and detailed publically accessible information beneficial for offshore wind farm development within the region.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…2014) and as far north as the region of the ‘Entenschnabel’ (Coughlan et al . 2018; Prins & Andresen 2021; Fig. S2).…”

Section: Discussionmentioning

confidence: 99%

Section: Figmentioning

confidence: 99%

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Stratigraphic and geotechnical characterization of regionally extensive and highly competent shallow sand units in the southern North Sea

Fleischer

Abegunrin

Hepp

et al. 2022

Boreas

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“…This allows more robust stratigraphic architecture interpretations away from data coverage, more accurate constraints on time-to-depth relationships, and helps to delimit the distribution and thickness of potentially weaker (or overconsolidated) clay-rich sedimentary facies, or graveland boulder-rich layers (Figure 7). Nonetheless, geoscientists can extract more stratigraphic and palaeoenvironmental information from geotechnical data, such as Cone Penetration Test (CPT) logs, combining seismic units and CPT facies to better characterise geotechnical stratigraphy (Prins and Andresen, 2021). This includes deriving substrate bulk density/unit weight and shear velocity, and undrained shear strength, and therefore the overconsolidation ratio due to palaeoenvironmental changes (e.g., loading by ice sheets), recorded in different stratigraphic levels.…”

Section: Integration Of Geophysical and Geotechnical Datamentioning

confidence: 99%

Geoscience Solutions for Sustainable Offshore Wind Development

Velenturf¹,

Emery²,

Hodgson³

et al. 2021

Earth Sci. Syst. Soc.

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Low carbon energy infrastructure, such as wind and solar farms, are crucial for reducing greenhouse gas emissions and limiting global temperature rise to 1.5°C. During 2020, 5.2 GW of offshore wind capacity went into operation worldwide, taking the total operational capacity of global offshore wind to 32.5 GW from 162 offshore windfarms, and over 200 GW of new capacity is planned by 2030. To meet net-zero targets, growth of offshore wind generation is expected, which raises new challenges, including integration of offshore wind into the natural environment and the wider energy system, throughout the wind farm lifecycle. This review examines the role of geosciences in addressing these challenges; technical sustainability challenges and opportunities are reviewed, filtered according to global governance priorities, and assessed according to the role that geoscience can play in providing solutions. We find that geoscience solutions play key roles in sustainable offshore wind energy development through two broad themes: 1) windfarm and infrastructure site conditions, and 2) infrastructure for transmission, conversion and energy storage. To conclude, we recommend priorities and approaches that will support geoscience contributions to offshore wind, and ultimately enable sustainable offshore wind development. Recommendations include industry collaboration and systems for effective data sharing and archiving, as well as further research, education and skills.

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Correlation Study on Grain Size Characteristics and Geotechnical Properties of Surface Sediments in Qingdao Offshore Area

Li,

Wang,

Guo

et al. 2024

J. Ocean Univ. China

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A geotechnical stratigraphy for the shallow subsurface in the Southern Central Graben, North Sea

Cited by 13 publications

References 34 publications

Stratigraphic and geotechnical characterization of regionally extensive and highly competent shallow sand units in the southern North Sea

Stratigraphic and geotechnical characterization of regionally extensive and highly competent shallow sand units in the southern North Sea

Geoscience Solutions for Sustainable Offshore Wind Development

Correlation Study on Grain Size Characteristics and Geotechnical Properties of Surface Sediments in Qingdao Offshore Area

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