Late Cretaceous to recent tectonic evolution of the North German Basin and the transition zone to the Baltic Shield/southwest Baltic Sea

2017 ◽  
Vol 708 ◽  
pp. 28-55 ◽  
Author(s):  
M. Al Hseinat ◽  
C. Hübscher
Keyword(s):  
Baltic Sea ◽  
Transition Zone ◽  
Late Cretaceous ◽  
Baltic Shield ◽  
Tectonic Evolution ◽  
North German Basin ◽  
The North ◽  
The Baltic ◽  
German Basin

scholarly journals Impact of Late Cretaceous inversion and Cenozoic extension on salt structure growth in the Baltic sector of the North German Basin

2021 ◽  
Author(s):  
Niklas Ahlrichs ◽  
Vera Noack ◽  
Christian Hübscher ◽  
Elisabeth Seidel ◽  
Arne Warwel ◽  
...  
Keyword(s):  
Late Cretaceous ◽  
North German Basin ◽  
The North ◽  
Salt Structure ◽  
The Baltic ◽  
German Basin

Cenozoic salt remobilization at the Baltic Sea sector of the northeastern North German Basin margin

2020 ◽  
Author(s):  
Niklas Ahlrichs ◽  
Elisabeth Seidel ◽  
Vera Noack ◽  
Hendrik Huster ◽  
Christian Hübscher
Keyword(s):  
Baltic Sea ◽  
Late Cretaceous ◽  
Late Triassic ◽  
Rift System ◽  
Stratigraphic Correlation ◽  
North German Basin ◽  
The Baltic Sea ◽  
The Baltic ◽  
Basin Margin ◽  
German Basin

<p>In the scope of the “StrucFlow” project, we study salt tectonics at the salt-floored northeastern North German Basin margin, which is part of the Central European Basin System. Salt pillows are located in the Bays of Kiel and Mecklenburg, in the SW Baltic Sea, east of the Glückstadt Graben and west of the Tornquist-Teisseyre Zone. Salt pillow growth initiated in the Late Triassic and rejuvenated in Late Cretaceous to Tertiary times. We combine offshore and nearby onshore wells, shallow seismic surveys and high-resolution seismic sections from the BalTec data to derive a detailed seismo-stratigraphic correlation of Cenozoic units. This allows a more precise analysis of Cenozoic salt movement in the transition zone between the Glückstadt Graben and Tornquist Zone. We present key profiles and time-isochore maps revealing new insights into salt pillow evolution at the northeastern North German Basin margin and discuss active phases of salt movement in the context of the regional tectonic framework.</p><p>We associate the Late Cretaceous phase of salt pillow growth with far-field effects of the Africa-Iberia-Europe convergence and the consequent Pyrenean orogeny. The resulting change from extensional to compressional intraplate stress caused graben inversion and thrust faulting in northern Europe. However, Early Cenozoic successions reveal no indications for ongoing salt movement and suggest a phase of salt tectonic quiescence. Within the Eocene, salt was remobilized at the Baltic Sea sector of the North German Basin, leading to renewed salt pillow growth and erosion above pillow crests. We propose that this phase of salt remobilization is controlled by the coeval initiation of the European Cenozoic Rift System, between the rising Alps in the south and the opening North Atlantic Ocean in the northwest. Faulting within Quaternary deposits above a salt wall in the Bay of Kiel could indicate continuous salt movement and was possibly amplified by glacial isostatic adjustment.</p>

Multiphase inversion in the Baltic sector of the North German Basin: Influence of Africa-Iberia-Europe convergence during the Late Cretaceous and Cenozoic

2021 ◽  
Author(s):  
Niklas Ahlrichs ◽  
Vera Noack ◽  
Christian Hübscher ◽  
Elisabeth Seidel
Keyword(s):  
Late Cretaceous ◽  
Late Eocene ◽  
Convergence Time ◽  
Rift System ◽  
North German Basin ◽  
Seismic Profiles ◽  
The North ◽  
Intraplate Stress ◽  
The Baltic ◽  
German Basin

<p>Within the DFG project StrucFlow, we investigate the multiphase character of Late Cretaceous to Cenozoic inversion in the Baltic sector of the North German Basin based on seismic interpretation. Our analysis rests upon modern high-resolution seismic profiles in combination with data from older seismic surveys and borehole information. The resulting seismic database consists of a dense profile network with a total length of some 10.000 km. This unprecedented seismic grid allows for a detailed tectono-stratigraphic interpretation of Cretaceous and Paleogene deposits in the Baltic sector of the North German Basin. Here, basin inversion began in the Coniacian and Santonian with uplift of the Grimmen High and minor reactivation of Zechstein salt structures. Crestal faults were formed or reactivated above salt pillows in the Bays of Mecklenburg and Kiel. The onset of inversion was contemporaneous with other adjacent basins and is likewise associated with building up intraplate stress within the European foreland related to the beginning Africa-Iberia-Europe convergence. Time-isopach maps of Paleocene deposits in the study area show a slight decrease in thickness to the west. This contrasts the prevailing trend of increasing thickness towards the southwest directed basin center and indicates a changed depositional environment. In the outer eastern Glückstadt Graben, increased thicknesses and diverging strata of late Eocene and Oligocene units indicate significant remobilization of salt structures during this time. Preexisting Triassic faults above the salt pillows “Schleimünde” and “Kieler Bucht” at the eastern border of the Glückstadt Graben were reactivated and form a north-south trending crestal graben filled with Paleogene sediments. This phase of salt remobilization is contemporaneous with the reintroduction of intraplate stress triggered by the Alpine and Pyrenean orogenies in the late Eocene. In the eastern Bay of Kiel and in the Bay of Mecklenburg, Late Eocene and younger sediments are largely absent due to Neogene uplift and erosion. Deepening of rim-synclines and synchronous infill of Paleogene strata give evidence for commencing salt pillow growth. Crestal faults pierce the Paleocene and Eocene strata, indicating salt movement at least during the later Eocene. This phase of salt movement occurred contemporaneously with salt remobilization in the Glückstadt Graben, initiation of the European Cenozoic Rift System and increased activity in the Alpine realm in the Late Eocene to Oligocene. We conclude that the rise of salt pillows since the Eocene significantly exceeds the growth during late Cretaceous to Paleocene inversion phase at the northeastern North German Basin.</p>

scholarly journals Rifting processes in NW-Germany and the German North Sea Sector

2002 ◽  
Vol 81 (2) ◽  
pp. 149-158 ◽  
Author(s):  
F. Kockel
Keyword(s):  
Central Europe ◽  
North Sea ◽  
Late Cretaceous ◽  
North German Basin ◽  
Nw Germany ◽  
Crustal Shortening ◽  
The North ◽  
And Inversion ◽  
German Basin

AbstractSince the beginning of the development of the North German Basin in Stephanien to Early Rotliegend times, rifting played a major role. Nearly all structures in NW-Germany and the German North Sea - (more than 800) - salt diapirs, grabens, inverted grabens and inversion structures - are genetically related to rifting. Today, the rifting periods are well dated. We find signs of dilatation at all times except from the Late Aptian to the end of the Turonian. To the contrary, the period of the Coniacian and Santonian, lasting only five million years was a time of compression, transpression, crustal shortening and inversion. Rifting activities decreased notably after inversion in Late Cretaceous times. Tertiary movements concentrated on a limited number of major, long existing lineaments. Seismically today NW-Germany and the German North Sea sector is one of the quietest regions in Central Europe.

Late Cretaceous–Cenozoic evolution of the North German Basin—results from 3-D geodynamic modelling

2003 ◽  
Vol 373 (1-4) ◽  
pp. 39-54 ◽  
Author(s):  
Lykke Gemmer ◽  
Søren B. Nielsen ◽  
Ulf Bayer
Keyword(s):  
Late Cretaceous ◽  
North German Basin ◽  
The North ◽  
German Basin

Retention of juveniles within a hybrid zone between North Sea and Baltic Sea Atlantic cod (Gadus morhua)

2005 ◽  
Vol 62 (10) ◽  
pp. 2219-2225 ◽  
Author(s):  
Einar E Nielsen ◽  
Peter Grønkjær ◽  
Dorte Meldrup ◽  
Helge Paulsen
Keyword(s):  
Population Structure ◽  
Baltic Sea ◽  
Transition Zone ◽  
North Sea ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Genetic Population ◽  
The North ◽  
Geographical Regions ◽  
The Baltic

Elucidating the relative roles of dispersal and retention of juvenile stages is an important issue for understanding population structure and evolution in marine organisms. We investigated the genetic population structure of juvenile Atlantic cod (Gadus morhua) within the transition zone between the North Sea and the Baltic Sea, employing nine microsatellite loci, and compared our data with adult cod data from the same area. Small but statistically significant overall differentiation (Fst = 0.003) was found among juvenile samples. Samples of juveniles grouped genetically with adult samples from the same geographical regions. Individual admixture analysis of a large sample of juveniles taken within the transition zone showed that the patterns of genetic differentiation could not be explained by mixing of pure North Sea and Baltic Sea individuals. Instead, the high number of juveniles with intermediate genotypes was compatible with a scenario of exclusive local (transition zone) origin. The results support the hypothesis that population structure in marine fishes is maintained by the retention of juveniles.

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