Seismic and field traces of the Kroměříž fault

a 2024

Seismic and field traces of the Kroměříž fault

KOLAČNÝ, David

Základní údaje

Originální název

Seismic and field traces of the Kroměříž fault

Název česky

Seismické indikace a terénní projevy Kroměřížského zlomu

Autoři

KOLAČNÝ, David

Vydání

Studentská geologická konference 2024, 2024

Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Obor

10505 Geology

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Organizační jednotka

Přírodovědecká fakulta

ISBN

978-80-280-0546-7

Klíčová slova česky

Vnější Západní Karpaty, akreční klín, Hornomoravský úval, zlom, 2D seismické interpretace, vrty, Petrel, kroměřížský zlom

Klíčová slova anglicky

Outer Western Carpathians, accretion wedge, Upper Morava Basin, fault, 2D seismic interpretation, boreholes, Petrel, Kroměříž fault

Změněno: 11. 6. 2025 11:06, Mgr. David Kolačný

Anotace

V originále

Western Carpathian flysch zone is in the central Moravia covered by the Pliocene graben of SE-NW direction. The southern fault of the graben is named the Kroměříž fault.We used 33seismic profiles, and 6 boreholes were utilized. Specifically, these include 2Dreflection seismic profiles and seismically surveyed boreholes with a depth of at least 1 km forthestudy of the Kroměříž Fault. This data was processed using Petrel software, which allows for interpretation in 3D. Through this method, three stratigraphic boundaries were identified: the Brunovistulian, Miocene, and accretionary wedge. By identifying these boundaries, it was possible to place the interpreted faults within a temporal framework. Based on this data, it was found that the Kroměříž Fault is a structure withanortheast-southwest orientation. This fault dips towards the east to northeast and affects both Brunovistulian and Miocene layers, as well as the accretionary wedge. Specifically, these layers are downthrown along the Kroměříž Fault, creating a graben structure. The degree of subsidence varies among different layers, with the greatest offset observed in the base of the Brunovistulian, averaging asubsidence of 400 m with a maximum value of up to 990 m. The smallest offset occurs in thesediments oftheaccretionary wedge. The heterogeneous subsidence along the Kroměříž Fault indicates that it is a syn-sedimentary fault, rather than one that occurred after the sedimentation of all layers. The onset of subsidence can be attributed to theMiocene, while the final phase of the Kroměříž Fault can be traced to the Pliocene based on borehole data. Based on 3D modellingof the Brunovistulian, it was found that the Kroměříž Fault ispart of a larger system of subsidence faults and cannot be unequivocally delineated in the model.

Návaznosti

MUNI/A/1426/2023, interní kód MU

Název: Dynamika a sedimentární systémy kolizních zón

Investor: Masarykova univerzita, Dynamika a sedimentární systémy kolizních zón

Citovat

KOLAČNÝ, David. Seismic and field traces of the Kroměříž fault. In Studentská geologická konference 2024. 2024. ISBN 978-80-280-0546-7.

@proceedings{2474578,
   author = {Kolačný, David},
   booktitle = {Studentská geologická konference 2024},
   keywords = {Outer Western Carpathians, accretion wedge, Upper Morava Basin, fault, 2D seismic interpretation, boreholes, Petrel, Kroměříž fault},
   language = {eng},
   isbn = {978-80-280-0546-7},
   title = {Seismic and field traces of the Kroměříž fault},
   url = {https://munispace.muni.cz/library/catalog/book/2366},
   year = {2024}
}

TY  - CONF
ID  - 2474578
AU  - Kolačný, David
PY  - 2024
TI  - Seismic and field traces of the Kroměříž fault
SN  - 9788028005467
KW  - Outer Western Carpathians, accretion wedge, Upper Morava Basin, fault, 2D seismic interpretation, boreholes, Petrel, Kroměříž fault
UR  - https://munispace.muni.cz/library/catalog/book/2366
N2  - Western Carpathian flysch zone is in the central Moravia covered by the Pliocene graben of SE-NW direction. The southern fault of the graben is named the Kroměříž fault.We used 33seismic profiles, and 6 boreholes were utilized. Specifically, these include 2Dreflection seismic profiles and seismically surveyed boreholes with a depth of at least 1 km forthestudy of the Kroměříž Fault. This data was processed using Petrel software, which allows for interpretation in 3D. Through this method, three stratigraphic boundaries were identified: the Brunovistulian, Miocene, and accretionary wedge. By identifying these boundaries, it was possible to place the interpreted faults within a temporal framework. Based on this data, it was found that the Kroměříž Fault is a structure withanortheast-southwest orientation. This fault dips towards the east to northeast and affects both Brunovistulian and Miocene layers, as well as the accretionary wedge. Specifically, these layers are downthrown along the Kroměříž Fault, creating a graben structure. The degree of subsidence varies among different layers, with the greatest offset observed in the base of the Brunovistulian, averaging asubsidence of 400 m with a maximum value of up to 990 m. The smallest offset occurs in thesediments oftheaccretionary wedge. The heterogeneous subsidence along the Kroměříž Fault indicates that it is a syn-sedimentary fault, rather than one that occurred after the sedimentation of all layers. The onset of subsidence can be attributed to theMiocene, while the final phase of the Kroměříž Fault can be traced to the Pliocene based on borehole data. Based on 3D modellingof the Brunovistulian, it was found that the Kroměříž Fault ispart of a larger system of subsidence faults and cannot be unequivocally delineated in the model.
ER  -

KOLAČNÝ, David. Seismic and field traces of the Kroměříž fault. In \textit{Studentská geologická konference 2024}. 2024. ISBN~978-80-280-0546-7.

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