@article{Dalętka_2021, title={Selected aspects of modern seismic imaging and near-surface velocity model building in the area of Carpathian fold and thrust belt}, volume={47}, url={https://journals.agh.edu.pl/geol/article/view/3997}, DOI={10.7494/geol.2021.47.2.71}, abstractNote={<p><span style="left: 204.982px; top: 596.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(0.947294);">Despite the increasing technological level of the reflection seismic method, the imaging of fold and </span><span style="left: 141.732px; top: 616.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(0.945089);">thrust belts remains a demanding task, and usually leaves some questions regarding the dips, the shape of the </span><span style="left: 141.732px; top: 636.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(1.00698);">subthrust structures or the most correct approach to velocity model building. There is no straightforward method </span><span style="left: 141.732px; top: 656.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(1.02106);">that can provide structural representation of the near-surface geological boundaries and their velocities. The in</span><span style="left: 891.699px; top: 656.301px; font-size: 16.6667px; font-family: serif;">-</span><span style="left: 141.732px; top: 676.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(1.00088);">terpretation of refracted waves frequently remains the only available technique that may be used for this purpose, </span><span style="left: 141.732px; top: 696.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(1.00627);">although one must be aware of its limitations which appear in the complex geological settings.</span></p> <p><span style="left: 141.732px; top: 716.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(1.00821);">In the presented study, the analysis of velocity values obtained in the shallow part of Carpathian orogenic wedge </span><span style="left: 141.732px; top: 736.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(1.00455);">by means of various geophysical methods was carried out. It revealed the lack of consistency between the results </span><span style="left: 141.732px; top: 756.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(1.01941);">of 3D refraction tomography and both the sonic log and uphole velocities. For that reason, instead of the indus</span><span style="left: 891.699px; top: 756.301px; font-size: 16.6667px; font-family: serif;">-</span><span style="left: 141.732px; top: 776.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(0.998704);">try-standard utilization of tomography, a novel, geologically-consistent method of velocity model building is pro</span><span style="left: 891.699px; top: 776.301px; font-size: 16.6667px; font-family: serif;">-</span><span style="left: 141.732px; top: 796.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(1.02216);">posed. In the near-surface part, the uphole velocities are assigned to the formations, documented by the surface </span><span style="left: 141.732px; top: 816.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(1.03116);">geologic map. Interpreted time-domain horizons, supplemented by main thrusts, are used to make the velocity </span><span style="left: 141.732px; top: 836.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(1.01965);">field fully-compatible with the litho-stratigraphic units of the Carpathians. </span></p> <p><span style="left: 141.732px; top: 856.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(1.02921);">T</span><span style="left: 141.732px; top: 856.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(1.02921);">he author demonstrates a retrospective overview of seismic data imaging in the area of the Polish Carpathian </span><span style="left: 141.732px; top: 876.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(1.02665);">orogenic wedge and discusses the most recent global innovations in seismic methodology which are the key to </span><span style="left: 141.732px; top: 896.301px; font-size: 16.6667px; font-family: serif; transform: scaleX(1.01871);">successful hydrocarbon exploration in fold and thrust regions.</span></p>}, number={2}, journal={Geology, Geophysics and Environment}, author={Dalętka, Andrzej Michał}, year={2021}, month={May}, pages={71–93} }