Crustal structure across the Teisseyre-Tornquist Zone offshore Poland based on a new refraction/wide-angle reflection profile and potential field modelling

Janik, Tomasz; Wójcik, Dariusz; Ponikowska, Małgorzata; Mazur, Stanisław; Skrzynik, Tymon; Malinowski, M.; Hübscher, Christian

doi:10.1016/j.tecto.2022.229271

Cited by 6 publications

(19 citation statements)

References 63 publications

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“…of the East European Platform overlying the low-density body postulated in this study, and the Moho depth perturbation revealed byJanik et al (2022; Figure …”

supporting

confidence: 60%

“…By contrast, the basement low along the first 30 km of the profile is the source of a negative gravity anomaly. However, in contrast to the more southerly sections of the TTZ (Janik et al., 2022; Mazur et al., 2016b), the broad gravity low is entirely related to the low‐density sediments within the offshore continuation of the inverted Mid‐Polish Trough. Similarly, to line PQ2‐004‐005, the CDF is practically undetectable by gravity and magnetic data (Figure 9) that confirms its thin‐skinned character.…”

Section: Results and Interpretationmentioning

confidence: 86%

“…In this case, the Moho is adopted from the earlier study by Janik et al. (2022). However, the Moho horizon is still deeper and flatter than in all the previous studies mentioned above.…”

Section: Discussionmentioning

confidence: 99%

“…Referring to experiments in Janik et al ( 2022) and earlier views summarized in Mazur et al (2016b), we implemented a low-density body in the middle crust to compensate for the anomaly in question. Regardless the nature of this body (see discussion in Janik et al (2022), andMazur et al (2016b)) it allows to achieve a good fit between the observed and modeled gravity profiles. Without a low-density body, a big, long-wavelength misfit exists in the model and the RMS error is more than tripled (Figure S4 in Supporting Information S1).…”

Section: -D Gravity and Magnetic Model For Profile Bgr16-212mentioning

confidence: 99%

“…Another interpretation previously suggested is that the crustal keel in the Baltic Sea represents underplating by magma that solidified at the base of the crust during the late Carboniferous to earliest Permian magmatic event (Thybo, 2000). Nevertheless, some seismic experiments did not provide evidence for a crustal keel underneath the STZ (DEKORP‐BASIN'96 PQ2 profiles; Bleibinhaus et al., 1999; Krawczyk et al., 2002) or TTZ (BalTec WARR profile; Janik et al., 2022) even if its presence was suggested by potential field data in the latter case. This was our motivation for undertaking potential field modeling together with the reinterpretation of the DEKORP‐BASIN'96 PQ2 deep reflection seismic profiles and interpretation of the regional seismic profile from the BalTec project (line BGR16‐212).…”

Section: Geological Setting and Previous Geophysical Studiesmentioning

confidence: 99%

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Crustal‐Scale Pop‐Up Structure at the Junction of Two Continental‐Scale Deformation Zones in the Southern Baltic Sea

Ponikowska,

Stovba,

Mazur

et al. 2024

Tectonics

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The southern Baltic Sea is a peculiar area, where the Sorgenfrei‐Tornquist Zone (STZ), stretching from Bornholm into the North Sea, connects to the Teisseyre‐Tornquist Zone (TTZ) that continues SE up to the Black Sea. In this study, we show the structure and evolution of this controversially debated area, both on crustal and basin scale, by using three seismic reflection profiles combined with 2‐D potential field data. The results demonstrate that the southern Baltic Sea is underlain by a thick crust of the East European Craton with a Moho depth in the range of 38–42 km. The overall crustal architecture is shaped by three phases of localized stretching in the early Paleozoic, Devonian‐Carboniferous, and Permian‐Mesozoic. The most spectacular feature of the southern Baltic Sea is a zone of thick‐skinned compressional deformation produced by Late Cretaceous‐early Paleogene inversion, including a system of thrusts and back thrusts penetrating the entire crust in an 80–90 km wide inversion zone. ENE‐vergent thrusts are traced from the top of the Cretaceous down to the Moho and they are accompanied by back thrusts of opposite vergence, also reaching the Moho. Inversion tectonics resulted in the uplift of a block of cratonic crust as a pop‐up structure, bounded by thrusts and back thrusts, and the displacement of the Moho within the STZ and TTZ. The similar mechanism of intra‐cratonic inversion was recognized for the Donbas Foldbelt in eastern Ukraine, and it may be characteristic of rigid cratons, where deformation is localized in a few preexisting zones of weakness.

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“…of the East European Platform overlying the low-density body postulated in this study, and the Moho depth perturbation revealed byJanik et al (2022; Figure …”

supporting

confidence: 60%

Section: Results and Interpretationmentioning

confidence: 86%

“…In this case, the Moho is adopted from the earlier study by Janik et al. (2022). However, the Moho horizon is still deeper and flatter than in all the previous studies mentioned above.…”

Section: Discussionmentioning

confidence: 99%

Section: -D Gravity and Magnetic Model For Profile Bgr16-212mentioning

confidence: 99%

Section: Geological Setting and Previous Geophysical Studiesmentioning

confidence: 99%

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Crustal‐Scale Pop‐Up Structure at the Junction of Two Continental‐Scale Deformation Zones in the Southern Baltic Sea

Ponikowska,

Stovba,

Mazur

et al. 2024

Tectonics

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Gas - Escape features along the Trzebiatów fault offshore Poland: Evidence for a leaking petroleum system

Nguyen

Malinowski

Kramarska

et al. 2023

Marine and Petroleum Geology

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On the Effect of 3D Wave Propagation on 2D Regional‐Scale Velocity Model Building

Górszczyk,

Brossier,

Métivier

2024

JGR Solid Earth

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Active seismic surveys are routinely employed by academia to study geological structure of the crust and upper mantle. Wavefields generated during these surveys are sampled at the receiver locations, but the wave‐paths traveled from a source to a sensor remains unknown. Although seismic acquisition layouts designed to investigate complex crustal‐scale environments are often two‐dimensional, the seismogram recorded at the receiver location represents information gathered along the three‐dimensional wavepaths that might offset from the 2D source/receiver profile along its transverse direction. This so‐called 3D‐effect distorts the results of 2D seismic imaging, which is unable to handle the out‐of‐plane propagation. Despite the numerous 2D seismic imaging case studies, the assessment of this issue is often overlooked. However, the problem exists ‐ especially for crustal‐scale profiles, where seismic energy propagates over distances of hundreds of kilometers and probes different crustal units. In this work we investigate the impact of 3D‐effect on the results of 2D velocity model building from the academic ocean‐bottom seismometer data. We show with polarization analysis how the 3D‐effect can manifest itself in the data domain. Using various scenarios of acquisition we evaluate the imprint of the out‐of‐plane propagation on the data and the results of full‐waveform inversion. We show that 2D velocity model building from the seismic profiles acquired in the complex geological setting can lead to wrong solution. Looking for the remedy to this issue we couple different configurations of acquisition geometries with 3D full‐waveform inversion that allow to handle the 3D effect and provide correct model reconstruction.

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Crustal structure across the Teisseyre-Tornquist Zone offshore Poland based on a new refraction/wide-angle reflection profile and potential field modelling

Cited by 6 publications

References 63 publications

Crustal‐Scale Pop‐Up Structure at the Junction of Two Continental‐Scale Deformation Zones in the Southern Baltic Sea

Crustal‐Scale Pop‐Up Structure at the Junction of Two Continental‐Scale Deformation Zones in the Southern Baltic Sea

Gas - Escape features along the Trzebiatów fault offshore Poland: Evidence for a leaking petroleum system

On the Effect of 3D Wave Propagation on 2D Regional‐Scale Velocity Model Building

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