A5043542933- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Geological formations and processes
- Seismic Imaging and Inversion Techniques
- Marine and environmental studies
- Hydrocarbon exploration and reservoir analysis
- Geological Studies and Exploration
- Reservoir Engineering and Simulation Methods
- Geophysics and Gravity Measurements
- Atmospheric and Environmental Gas Dynamics
- Maritime and Coastal Archaeology
- Marine and fisheries research
- Scientific Research and Discoveries
- Geological and Geophysical Studies
- Climate change and permafrost
- Coastal and Marine Management
- Underwater Acoustics Research
- earthquake and tectonic studies
- Indigenous Studies and Ecology
- Isotope Analysis in Ecology
- Geological Modeling and Analysis
- Aeolian processes and effects
- Polar Research and Ecology
- Geological and Geochemical Analysis
- Arctic and Russian Policy Studies
Geological Survey of Denmark and Greenland
2014-2024
Geological Observatory of Coldigioco
2002
Carleton College
2002
Danish Nature Agency
1989
Reconstructions of environmental changes at sub‐decadal to decadal resolution based on central Baltic Sea sediments rely accurate and precise high‐resolution sediment depth/age relationships. A model chronology for is presented here established historical records anthropogenic radionuclides ( 137 Cs/ 241 Am/bomb 14 C), polychlorinated biphenyls PCB s), lead (Pb) stable isotope 206/207 Pb ratios), radionuclide 210 C decay dating methods. Marker horizons consisting chemical precipitates formed...
One of the most discussed stages in history Baltic Sea is Ancylus Lake phase. This paper presents detailed information from Darss Sill threshold area as well adjacent basins, i.e. Mecklenburg Bay and Arkona Basin located southwesternmost Baltic. The was transgressed at Ice maximum phase during following regression about 10.3 ka BP a river valley incised to level 23–24 m below present sea (b.s.l.). Preboreal sediments study show lowstand basin deposition existence local lake Bay. system...
Jensen, J. B., Bennike, O., Witkowski, A., Lemke, W. & Kuijpers, A. 1997 (September): The Baltic Ice Lake in the southwestern Baltic: sequence‐, chrono‐ and biostratigraphy. Boreas , Vol. 26, pp. 217–236. Oslo. ISSN 0300–9483. This multidisciplinary study focuses on late‐glacial deposits Mecklenburg Bay ‐Arkona Basin area. sequence stratigraphical method has been used shallow seismic lithological data, combination with biostratigraphical work radiocarbon dating. Glacial‐till underlie...
Abstract A 2‐D high‐resolution velocity field was obtained from marine seismic data to quantify free gas content in shallow muddy sediments at situ pressure and temperature. The velocities were acquired applying Migration Velocity Analysis on prestack time‐migrated data. Compressional wave are highly sensitive as very small amounts of can cause a significant decrease the medium velocity. analyzed profile crosses depression filled with organic‐rich Holocene mud Bornholm Basin, Baltic Sea....
On the basis of shallow seismic records, vibrocoring, macrofossil analyses and AMS radiocarbon‐dating, five stratigraphical units have been distinguished from deepest parts central Great Belt (Storebælt) in southern Scandinavia. Widespread glacial deposits are followed by two lateglacial confined to deeply incised channels separated an erosional boundary. Lateglacial Unit I dates time interval last deglaciation Allerød; II is Younger Dryas age. Early Holocene show a development river...
After the last deglaciation, Baltic Sea underwent a complex salinity history and dynamic shore-level development with several lacustrine marine stages: Ice Lake, Yoldia Sea, Ancylus Lake Littorina (Björck 1995). In connection shallow seismic profiling in south-western two marked widespread erosional unconformities have been identified (Jensen et al. 1997, 1999; Lemke 1998; Larsen 2004). The older unconformity occurs within sediments deposited whereas younger one separates from Holocene lake...
Seismoacoustic profiles from the Arkona Basin show a late Pleistocene and Holocene succession of several distinct reflectors. The physical, sedimentological, mineralogical geochemical properties more than 30 sediment cores were analysed in order to assign these reflectors specific sedimentary discontinuity layers. Additionally, AMS 14 C data biostratigraphic information gathered. Based on this multi‐proxy approach, seven lithostratigraphic units (AI, AII, B F) distinguished. These consist...
Sub-marine deposits in the region of Arkona Basin, Mecklenburg Bay and Darss Sill have been studied using a multi-disciplinary approach that includes shallow seismic work, depositional sequence stratigraphy, radiocarbon dating analyses diatoms macrofossils. Models for relative shore level changes two basin areas are proposed. Both Basin maximum levels c. 20 m below present sea were reached late Allerød, Younger Dryas Preboreal. The drainage Baltic Ice Lake led to drops, but drop only...
This study uses a multiproxy approach including the first use of 187 Os/ 188 Os, %C 37:4 biomarkers, carbonate content, sedimentological grain size, geochemical X‐ray fluorescence and microfossil benthic foraminifera species combined with radiocarbon dating, measured on six cores from across Skagerrak, in order to Lateglacial Middle Holocene history area. A new chronostratigraphic framework is developed based appearance specific along changes carbonate/X‐ray size data. allowed correlation...
Research Article| March 01, 2009 Remote quantification of methane fluxes in gassy marine sediments through seismic survey A.W. Dale; Dale 11Department Earth Sciences–Geochemistry, Utrecht University, P.O. Box 80021, 3508 TA Utrecht, Netherlands *Current address: Leibniz-Institut für Meereswissenschaften, IFM-GEOMAR, Wischhofstr. 1-3, D-24148 Kiel, Germany; e-mail: dale@geo.uu.nl. Search for other works by this author on: GSW Google Scholar P. Regnier; Regnier Van Cappellen; Cappellen...
Late‐ and postglacial geological evolution of the southern Kattegat connection to Great Belt was investigated from high‐resolution seismic data radiocarbon‐dated sediment cores in order elucidate Ancylus Lake drainage/Littorina Sea transgression. It found that glacial deposits form acoustic basement are covered by Lateglacial ( LG ) marine sediments PG ; Holocene) material. The a highstand systems tract, whereas cover full depositional sequence, consisting lowstand tract I), transgressive II...
The Bornholm Basin has experienced a complex history linked closely to the structural development of Tornquist Zone strike‐slip fault system. latest major tectonic was late Cretaceous and early Tertiary Rønne Graben inversion caused by dextral transpressional movements focused around rigid blocks such as Bornholm. By applying concept, it is possible show that push‐up structure created restraining left step‐over. system continues northwest north where movement resulted in right step‐over...