A seismic velocity model for the SW Baltic Sea derived from BASIN'96 refraction seismic data

Bleibinhaus, Florian; Beilecke, Thies; Bram, K.; Gebrande, H.

doi:10.1016/s0040-1951(99)00248-6

Cited by 22 publications

(16 citation statements)

References 17 publications

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“…A detailed rheological study of the area (Marotta et al 1999(Marotta et al , 2000 supports the idea that the German Basin is stronger than the surrounding regions. This increase in the local strength is also consistent with other geophysical parameters: high lower crustal seismic velocities (Thybo 1990;Rabbel et al 1995;Bleibinhaus et al 1999) and high lower crustal density, as indicated by gravity modelling (Scheck et al 1999;Bayer et al 1999).…”

Section: R E S U L T Ssupporting

confidence: 87%

The stress field below the NE German Basin: effects induced by the Alpine collision

Marotta

Bayer

Scheck

et al. 2001

Geophysical Journal International

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Summary We use a thin‐sheet approach for a viscous lithosphere to investigate the effects induced by the Alpine collision on the vertical deformation and regional stress in northern Europe, focusing on the NE German Basin. New seismic studies indicate a flexural‐type deep crustal structure under the basin, which may be induced by compressive forces transmitted from the south and related to Alpine tectonics. Finite element techniques are used to solve the vertical deformation and stress field for a viscous European lithosphere with horizontal rheological heterogeneities. Our results support the idea that a relatively strong lithosphere below the northern margin of the German Basin at the transition into the Baltic Shield may explain the characteristic regional stress field, especially the fan‐like pattern that is observed within the region.

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Section: R E S U L T Ssupporting

confidence: 87%

The stress field below the NE German Basin: effects induced by the Alpine collision

Marotta

Bayer

Scheck

et al. 2001

Geophysical Journal International

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“…Besides deep crustal seismic refraction experiments [e.g., Aichroth et al , 1992; Schulze and Lück , 1992], only a few studies have investigated the internal sedimentary velocity structure in the central European basins so far. A velocity model along a seismic refraction profile near the I‐GET study area was derived for the SW Baltic Sea [ Bleibinhaus et al , 1999]. Using larger source and receiver spacing and a longer profile length than in I‐GET, the model extends over 200 km distance with a depth of penetration of 35 km, and the sedimentary part of the basin is resolved with less details in their models compared with the results from Groß Schönebeck.…”

Section: Interpretation and Discussionmentioning

confidence: 99%

Tomographic P wave velocity and vertical velocity gradient structure across the geothermal site Groß Schönebeck (NE German Basin): Relationship to lithology, salt tectonics, and thermal regime

Bauer¹,

Moeck²,

Norden³

et al. 2010

J. Geophys. Res.

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. (2010): Tomographic Pwave velocity and vertical velocity gradient structure across the geothermal site Gross Schoenebeck (NE German Basin): Relationship to lithology, salt tectonics, and thermal structure. [1] Seismic wide-angle data were collected along a 40-km-long profile centered at the geothermal research well GrSk 3/90 in the Northeast German Basin. Tomographic inversion of travel time data provided a velocity and a vertical velocity gradient model, indicative of Cenozoic to Pre-Permian sediments. Wide-angle reflections are modeled and interpreted as top Zechstein and top Pre-Permian. Changes in velocity gradients are interpreted as the transition from mechanical to chemical compaction at 2-3 km depth, and localized salt structures are imaged, suggesting a previously unknown salt pillow in the southern part of the seismic profile. The Zechstein salt shows decreased velocities in the adjacent salt pillows compared to the salt lows, which is confirmed by sonic log data. This decrease in velocity could be explained by the mobilization of less dense salt, which moved and formed the salt pillows, whereas the denser salt remained in place at the salt lows. We interpret a narrow subvertical low-velocity zone under the salt pillow at GrSk 3/90 as a fault in the deep Permian to Pre-Permian. This WNW-ESE trending fault influenced the location of the salt tectonics and led to the formation of a fault-bounded graben in the Rotliegend sandstones with optimal mechanical conditions for geothermal production. Thermal modeling showed that salt pillows are related to chimney effects, a decrease in temperature, and increasing velocity. The assumed variations in salt lithology, density, and strain must thus be even higher to compensate for the temperature effect.Citation: Bauer, K., I. Moeck, B. Norden, A. Schulze, M. Weber, and H. Wirth (2010), Tomographic P wave velocity and vertical velocity gradient structure across the geothermal site Groß Schönebeck (NE German Basin): Relationship to lithology, salt tectonics, and thermal regime,

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“…The suture between Baltica and Avalonia is at a relatively low angle and is thus capable of being imaged on normal-incidence reflection profiles (Krawczyk, Stiller & DEKORP-BASIN Research Group, 1999), and is not a vertical boundary as Berthelsen postulated. Furthermore, refraction seismic data of Bleibinhaus et al (1999) show a high-velocity layer in the lower crust beneath the northeast German mainland which is interpreted as evidence of a genetic relationship to Baltica crust. A wedge-shaped structure rather than a vertical boundary is also found in the receiver function analyses from the TOR data of Gossler et al (1999).…”

Section: C Geophysical Evidencementioning

confidence: 94%

The Trans-European Fault: a critical reassessment

McCann

Krawczyk

2001

Geol. Mag.

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-New deep seismic profiles in the southern Baltic region have failed to image the TransEuropean Fault. Evidence for this structure, of suggested pre-Cadomian age, is critically re-examined. Localized geophysical anomalies are present, but these cannot be correlated with known structural features of the region. Based on the inconclusive evidence for this structure, we would therefore propose that the term 'Trans-European Fault' should not be used in the future, and that, to avoid confusion, authors use local names for local structures.

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A seismic velocity model for the SW Baltic Sea derived from BASIN'96 refraction seismic data

Cited by 22 publications

References 17 publications

The stress field below the NE German Basin: effects induced by the Alpine collision

The stress field below the NE German Basin: effects induced by the Alpine collision

Tomographic P wave velocity and vertical velocity gradient structure across the geothermal site Groß Schönebeck (NE German Basin): Relationship to lithology, salt tectonics, and thermal regime

The Trans-European Fault: a critical reassessment

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