Abstract
AbstractThis work analyses six high-resolution multi-channel seismic profiles across the Klints Bank east of Gotland. The Klints Bank consists of a drop-shaped increase of the Quaternary thickness and is oriented in an approximately north-southern direction with a length of over 50 km, a width of about 15 km and a maximum thickness of 150 m. The glacial origin of the Klints Bank can be verified with the dataset presented in this study. We classify the feature as a (giant) drumlin due to its steep up-ice and tapered down-ice face in combination with an orientation parallel to the ice-flow direction of the Weichselian glaciation. The seismic image of the internal structure of the Quaternary unit shows no uniform stratification or deformation patterns; instead, local sub-parallel reflection patterns interlayered with transparent units are observed. The averaged seismic velocity of this unit is about 2000 m/s, which is interpreted as an autochthonous deposition of glaciogenic sediments. Signs of overprinting are interpreted based on the geometry of the flanks of the structure, which appear mostly in the form of collapse structures and lifted blocks due to compressional thrust faulting. Phase-reversed events within and beneath the Quaternary are perceived as strong evidence of fluid (hydrocarbon) presence within the Klints Bank. Organically enriched Palaeozoic shales in south-easterly direction of the Klints Bank presumably give the origin of these thermogenic hydrocarbons.
Funder
Deutsche Forschungsgemeinschaft
Publisher
Springer Science and Business Media LLC
Subject
Earth and Planetary Sciences (miscellaneous),Geotechnical Engineering and Engineering Geology,Environmental Science (miscellaneous),Oceanography
Reference64 articles.
1. Al Hseinat M, Hübscher C (2017) Late Cretaceous to recent tectonic evolution of the North German Basin and the transition zone to the Baltic Shield/southwest Baltic Sea. Tectonophysics 708:28–55
2. Andrén T, Björck S, Andrén E, Conley D, Zillén L, Anjar J (2011) The development of the Baltic Sea Basin during the last 130 ka. In: Harff J, Björck S, Hoth P (eds) The Baltic Sea Basin (2011). Springer, Berlin Heidelberg, pp 13–51
3. Bjerkéus M, Eriksson M (2001) Late Silurian reef development in the Baltic Sea. GFF 123(3):169–179
4. Brangulis, A. P., Kanev, S. V., Margulis, L. S., Pomerantseva, R. A. (1993). Geology and hydrocarbon prospects of the Paleozoic in the Baltic region. In Geological Society, London, Petroleum Geology Conference series (Vol. 4, No. 1, pp. 651-656). Geological Society of London
5. Calner M, Jeppsson L, Munnecke A (2004) The Silurian of Gotland—part I: review of the stratigraphic framework, event stratigraphy, and stable carbon and oxygen isotope development. Erlanger geologische Abhandlungen, Sonderband 5:113–131
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献