Neoproterozoic and Palaeozoic evolution of SW Scandinavia based on integrated seismic interpretation

Lassen, A.; Thybo, Hans

doi:10.1016/j.precamres.2012.01.008

Cited by 39 publications

(36 citation statements)

References 81 publications

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“…The edge of the EEC in Poland, the Teisseyre-Tornquist Zone (TTZ), continues in SW Scandinavia as the Sorgenfrei-Tornquist Zone (STZ). This boundary between Baltica and Phanerozoic Europe is well visible in the basement, Moho depth, as well as in lithospheric thickness (e.g., Lassen and Thybo 2012;ScheckWenderoth and Maystrenko 2013;Grad et al 2009Grad et al , 2014Knapmeyer-Endrun et al 2014;Wilde-Piórko et al 2010;Puziewicz et al 2006;Gregersen et al 2002;Geissler et al 2010). The gravity modeling suggests a very small density value in the uppermost mantle 3.11 g/cm 3 below the younger area of WEP, while for the older area of EEC, it is 3.3 g/cm 3 (e.g., Krysiński et al 2009).…”

Section: Discussionmentioning

confidence: 96%

“…Two types of crust are reflected in basement velocities: velocities Vp > 6 km/s are observed in the EEC, north of the TTZ, while southwest of the TTZ velocities of the uppermost basement are significantly lower, being Vp < 6 km/s. The continuation of the structures to the northwest is discussed for the Central European Basin System (Scheck-Wenderoth and Maystrenko 2013) and the Danish area and surroundings (Lassen and Thybo 2012).…”

Section: Discussionmentioning

confidence: 99%

“…The EEC basement density of 2.71-2.75 g/cm 3 was modeled across the Skagerrak Graben (Lassen and Thybo 2012). In NW Poland, Królikowski and Petecki (2002) obtained a 2D density model along the LT-7 profile with basement values of 2.68 g/cm 3 for WEP and 2.82 g/cm 3 for EEP.…”

Section: Discussionmentioning

confidence: 99%

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Seismic basement in Poland

Grad

Polkowski

2015

Int J Earth Sci (Geol Rundsch)

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

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Seismic basement in Poland

Grad

Polkowski

2015

Int J Earth Sci (Geol Rundsch)

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“…The Tornquist Zone, including the STZ and TTZ, has been extensively studied using a variety of geological and geophysical methods, including seismic tomography (Cotte and Pedersen, 2002;Voss et al, 2006), seismic refraction (Guterch et al, 1986;Guterch and Grad, 2006;Alasonati Tašárová et al, 2016), seismic anisotropy 105 (Babuška and Plomerová, 2004), and seismic reflection surveying (Grad et al, 1999;Thybo, 2000;Lassen and Thybo, 2012). These data suggest that the lineament separates thick, old cratonic lithosphere of the East European Craton, including Baltica, from the younger, thinner lithosphere associated with assorted Palaeozoic terranes belonging to Central and Western Europe (Fig.…”

Section: Geometry and Origin Of The Sorgenfrei-tornquist Zonementioning

confidence: 99%

“…Montalbano et al (2016) note a sinistral phase of motion along the present-day trend of the STZ around this time, indicating that the structure must have existed in some form at this time. Although the STZ appears to have been present in some form since the Late Proterozoic (Lassen and Thybo, 2012;Montalbano et al, 2016), 620 its upper crustal component appeared to have been established during the Carboniferous-Permian as a lithosphere-scale strike-slip system, exploiting the change in lithospheric thickness and properties at depth (Erlström et al, 1997;Lassen and Thybo, 2012). The localised reactivation of this structure appears to buffer the cratonic lithosphere of Baltica against the regional tectonic events that affect the amalgamated terranes of Central Europe (cf.…”

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confidence: 99%

Oblique reactivation of lithosphere-scale lineaments controls rift physiography – The upper crustal expression of the Sorgenfrei-Tornquist Zone, offshore southern Norway

Phillips¹,

Jackson²,

Bell³

et al. 2017

Preprint

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Abstract. Pre-existing structures within sub-crustal lithosphere may localise stresses during subsequent tectonic events, resulting in complex fault systems at upper crustal levels. As these sub-crustal structures are difficult to resolve at great depths, the evolution of kinematically and perhaps geometrically linked upper-crustal fault populations can offer insights into their deformation history, including when and how they reactivate and accommodate stresses during later tectonic events. In this study, we use borehole-constrained 2D and 3D 15seismic reflection data to investigate the structural development of the Farsund Basin, offshore southern Norway; this E-trending basin represents the upper crustal expression of the Sorgenfrei-Tornquist Zone, a major lithosphere-scale lineament extending >1000 km across Central Europe. The southern margin of the Farsund Basin is characterised by N-S and E-W-striking fault populations, the latter extending down through the Moho and potentially linking with the Sorgenfrei-Tornquist Zone as imaged within sub-crustal lithosphere. Due to this 20 geometric linkage, we can analyse the upper crustal fault populations to infer the kinematics of the SorgenfreiTornquist Zone. We use throw-length (T-x) analysis and fault displacement backstripping techniques to determine the geometric and kinematic evolution of upper-crustal fault populations during the multiphase evolution of the Farsund Basin. We document a period of sinistral strike-slip activity along E-W-striking faults during the Early Jurassic, representing a hitherto undocumented phase of activity along the Sorgenfrei-Tornquist 25Zone. These E-W-striking upper-crustal faults are later obliquely reactivated under a dextral stress regime during the Early Cretaceous, with new faults also propagating away from pre-existing ones, representing a switch to a phase of dextral transtension along the Sorgenfrei-Tornquist Zone. We show that the SorgenfreiTornquist Zone represents a long-lived lithosphere-scale lineament that is periodically reactivated throughout its protracted geological history. The upper crustal component of the lineament is reactivated in a range of tectonic 30 styles, including both sinistral and dextral strike-slip motions, with the geometry and kinematics of these faults often inconsistent with what may otherwise be inferred from regional tectonics alone. Understanding these different styles of reactivation not only allows us to better understand the influence of sub-crustal lithospheric structure on rifting, but also offers insights into the prevailing stress field during regional tectonic events. 35Solid Earth Discuss., https://doi

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Early diagenetic evolution of Chalk in eastern Denmark

Moreau

Boussaha

Nielsen

et al. 2016

The Depositional Record

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The genesis of polygonal faults is an intriguing diagenetic phenomenon. This study discusses their origin in carbonate mudstones together with other associated diagenetic features. In the eastern Danish Basin, at the fringe of the Baltic Sea, the Stevns peninsula offers a unique opportunity to study the early diagenesis of Upper Cretaceous Chalk deposits, buried between 500 m and 1400 m. This paper combines data from onshore and offshore high-resolution seismic reflection profiles, a fully cored borehole with high-resolution wireline logs and quarry and coastal cliff outcrops to study early diagenetic features at different scales. Chalk is affected by an extensive polygonal fault system that is detected in onshore and offshore seismic data. Outcrop and core data provide a better understanding of the distribution of contraction-related features like deformation bands (hairline fractures), stylolites and fluid escape structures. An original model of genetic relationships between these different diagenetic processes is documented for Chalk. The spatial relationships between stylolites and fractures suggest that pressure-solution processes triggered shear failure that initiated the polygonal fault systems. The early diagenetic processes affect the reservoir properties of Chalk by creating compartments and vertical connections. Taking these features into account will allow for a more detailed understanding of early diagenesis and better models for exploiting drinking water or hydrocarbons hosted in Chalk.

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Neoproterozoic and Palaeozoic evolution of SW Scandinavia based on integrated seismic interpretation

Cited by 39 publications

References 81 publications

Seismic basement in Poland

Seismic basement in Poland

Oblique reactivation of lithosphere-scale lineaments controls rift physiography – The upper crustal expression of the Sorgenfrei-Tornquist Zone, offshore southern Norway

Early diagenetic evolution of Chalk in eastern Denmark

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