Paleokras w utworach górnej jury podłoża zapadliska przedkarpackiego i jego znaczenie złożowe

Miziołek, Mariusz; Filar, Bogdan

doi:10.18668/ng.2019.06.04

Cited by 1 publication

(3 citation statements)

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“…The examples presented in this paper document the occurrence of various paleokarst forms in the Polish part of the Carpathian Foreland. Previous research on karst formations in the area has mainly focused on the analysis of geological and borehole data [19,20]. Of the available borehole data, the records obtained from high-resolution survey methods such as the X-tended Range Micro Imager (XRMI) and Circumferential Acoustic ScanningTool (CAST) proved to be the most useful.…”

Section: Discussionmentioning

confidence: 99%

“…The base-level karst is controlled by different-order sequence episodes, whereas the nonbase-level karst is mainly controlled by tectonics, where the fracture system allows for the flow of surface and thermal waters (Figure 2). Hydrothermal waters in the Carpathian Foreland area for the analyzed Cretaceous-Jurassic intervals are characterized by temperatures of 50-70 Celsius degrees and increased mineralization [20]. The influence of the activity of hydrothermal waters is ubiquitous and noticeable in the region regardless of the genetic type of the karst forms.…”

Section: Discussionmentioning

confidence: 99%

“…The rock formations within the area belong to four main structural stages: Neoproterozoic, Paleozoic, Permian-Mesozoic and Miocene. A more detailed description of the geological structure of the area was presented in the authors' earlier publications [19][20][21]. The oldest structural stage in the research area is represented by a series of Neoproterozoic anchimetamorphic rocks.…”

Section: Geological Backgroundmentioning

confidence: 99%

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Examples of Paleokarst in Mesozoic Carbonate Formations in the Carpathian Foreland Area

Łaba-Biel,

Filipowska-Jeziorek,

Urbaniec

et al. 2024

Energies

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A paleokarst system developed in the Upper Jurassic–Lower Cretaceous carbonate complex has been recognized in the Carpathian Foreland area. Well logs testing and core data as well as an acoustic imager, a microresistivity scanner and six-arm dipmeter images were used to identify and analyze the character of the paleokarst features. A detailed interpretation of microresistivity and acoustic image logs allowed for the identification of different types of karst forms, such as caverns; multidirectional fractures, including fractures widened by dissolution; and the type of sediments filling them. The analysis of the seismic survey was conducted by linking the paleokarst characteristic features recognized in the seismic image to the karst intervals determined from borehole data. The set of seismic attributes calculated from the analyzed 3D seismic data, including the RMS amplitude, instantaneous frequency, consistent dip, variance, sweetness and relative acoustic impedance, helped to delineate the zones of the paleokarst distribution. Within the interpreted paleokarst surface developed in the carbonate formations in the study area, there are sinkholes, limestone pavements and valleys. Furthermore, in the northwestern part of the analyzed area, the development of paleokarst forms is related to the presence of a relatively deep branch of a paleovalley formed in the Paleogene, as well as to numerous discontinuities developed in carbonate formations. The development of this type of larger karst form was probably controlled primarily by tectonic faults. The research conducted by the authors of this paper showed the widespread presence of paleokarst features in Upper Jurassic–Lower Cretaceous carbonate formations in the study area. A good spatial identification of the paleokarst surface can be important in a regional context, since the highest part of the profile of carbonate formations is the most important reservoir for geothermal or hydrocarbon resources in this region.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%