Mechanical properties of basaltic volcanic bombs: a case study
from the Uhlířský vrch volcano, Czech Republic

J 2025

Mechanical properties of basaltic volcanic bombs: a case study from the Uhlířský vrch volcano, Czech Republic

BRABEC, Marek; Lukas KRMICEK; Valentin R. TROLL; Karel DVORAK; Daniela MARKOVA et al.

Základní údaje

Originální název

Mechanical properties of basaltic volcanic bombs: a case study from the Uhlířský vrch volcano, Czech Republic

Autoři

BRABEC, Marek; Lukas KRMICEK; Valentin R. TROLL; Karel DVORAK; Daniela MARKOVA a Daniel PLUSKAL

Vydání

BULLETIN OF VOLCANOLOGY, UNITED STATES, SPRINGER, 2025, 0258-8900

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10505 Geology

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 3.200 v roce 2024

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/25:00143254

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

Basaltic volcanism; Volcanic bomb; Mechanical properties; Hoek-Brown failure criterion; Bruntál Volcanic Field

Štítky

14314010, 143180, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 20. 1. 2026 09:59, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

Basaltic eruptions produce a wide variety of volcanic products that show a range of different textures and physical properties, from massive lava to extremely light and aerated reticulite. While the mechanical properties of various lavas and tuffs have already been studied in more detail, volcanic bombs have received almost no attention. We characterised the mechanical and physical properties of bombs from the Plio-Pleistocene Uhl & iacute;& rcaron;sk & yacute; vrch in the Brunt & aacute;l Volcanic Field (Czech Republic) to better define their geomechanical behaviour compared to the wider range of volcanic eruption products. The cylindrical specimens showed a highly variable internal structure which resulted in scattered individual peak strength values. In contrast, the residual strength values were less variable, and thus we devised a system using the Hoek-Brown criterion for the whole bomb mechanical characterisation. This approach assigns different geological strength index (GSI) values to the specimens based on their internal structure. The bombs combine the generally low cohesion and strength of tuffs with a higher internal friction angle and a material constant akin to lava samples. The bombs may therefore be treated as a lava-like material albeit with a pyroclastic origin. From a geotechnical point of view, the presence of bombs embedded in other rock types could affect the general stability of a volcanic structure. Here we identify possible scenarios (i.e. bombs embedded in pyroclastic rock versus bombs buried in lava; bombs distributed randomly versus bombs forming a loosely connected horizon) and describe the possible outcomes. Finally, the cracked and porous structure of bombs locally increases permeability, thereby promoting hydrothermal alteration and further affecting general slope stability. However, the porous structure of bombs could also have a potential positive societal impact as it may allow for local sequestration of carbon dioxide.

Přiložené soubory

2546662.pdf

Citovat

BRABEC, Marek; Lukas KRMICEK; Valentin R. TROLL; Karel DVORAK; Daniela MARKOVA a Daniel PLUSKAL. Mechanical properties of basaltic volcanic bombs: a case study from the Uhlířský vrch volcano, Czech Republic. BULLETIN OF VOLCANOLOGY. UNITED STATES: SPRINGER, 2025, roč. 87, č. 12, s. 1-19. ISSN 0258-8900. Dostupné z: https://doi.org/10.1007/s00445-025-01921-1.

@article{2546662,
   author = {Brabec, Marek and Krmicek, Lukas and Troll, Valentin R. and Dvorak, Karel and Markova, Daniela and Pluskal, Daniel},
   article_location = {UNITED STATES},
   article_number = {12},
   doi = {https://doi.org/10.1007/s00445-025-01921-1},
   keywords = {Basaltic volcanism; Volcanic bomb; Mechanical properties; Hoek-Brown failure criterion; Bruntál Volcanic Field},
   language = {eng},
   issn = {0258-8900},
   journal = {BULLETIN OF VOLCANOLOGY},
   title = {Mechanical properties of basaltic volcanic bombs: a case study from the Uhlířský vrch volcano, Czech Republic},
   url = {https://link.springer.com/article/10.1007/s00445-025-01921-1?utm_source=getftr&utm_medium=getftr&utm_campaign=getftr_pilot&getft_integrator=clarivate},
   volume = {87},
   year = {2025}
}

TY  - JOUR
ID  - 2546662
AU  - Brabec, Marek - Krmicek, Lukas - Troll, Valentin R. - Dvorak, Karel - Markova, Daniela - Pluskal, Daniel
PY  - 2025
TI  - Mechanical properties of basaltic volcanic bombs: a case study from the Uhlířský vrch volcano, Czech Republic
JF  - BULLETIN OF VOLCANOLOGY
VL  - 87
IS  - 12
SP  - 1-19
EP  - 1-19
PB  - SPRINGER
SN  - 02588900
KW  - Basaltic volcanism
KW  - Volcanic bomb
KW  - Mechanical properties
KW  - Hoek-Brown failure criterion
KW  - Bruntál Volcanic Field
UR  - https://link.springer.com/article/10.1007/s00445-025-01921-1?utm_source=getftr&utm_medium=getftr&utm_campaign=getftr_pilot&getft_integrator=clarivate
N2  - Basaltic eruptions produce a wide variety of volcanic products that show a range of different textures and physical properties, from massive lava to extremely light and aerated reticulite. While the mechanical properties of various lavas and tuffs have already been studied in more detail, volcanic bombs have received almost no attention. We characterised the mechanical and physical properties of bombs from the Plio-Pleistocene Uhl & iacute;& rcaron;sk & yacute; vrch in the Brunt & aacute;l Volcanic Field (Czech Republic) to better define their geomechanical behaviour compared to the wider range of volcanic eruption products. The cylindrical specimens showed a highly variable internal structure which resulted in scattered individual peak strength values. In contrast, the residual strength values were less variable, and thus we devised a system using the Hoek-Brown criterion for the whole bomb mechanical characterisation. This approach assigns different geological strength index (GSI) values to the specimens based on their internal structure. The bombs combine the generally low cohesion and strength of tuffs with a higher internal friction angle and a material constant akin to lava samples. The bombs may therefore be treated as a lava-like material albeit with a pyroclastic origin. From a geotechnical point of view, the presence of bombs embedded in other rock types could affect the general stability of a volcanic structure. Here we identify possible scenarios (i.e. bombs embedded in pyroclastic rock versus bombs buried in lava; bombs distributed randomly versus bombs forming a loosely connected horizon) and describe the possible outcomes. Finally, the cracked and porous structure of bombs locally increases permeability, thereby promoting hydrothermal alteration and further affecting general slope stability. However, the porous structure of bombs could also have a potential positive societal impact as it may allow for local sequestration of carbon dioxide.
ER  -

BRABEC, Marek; Lukas KRMICEK; Valentin R. TROLL; Karel DVORAK; Daniela MARKOVA a Daniel PLUSKAL. Mechanical properties of basaltic volcanic bombs: a case study from the Uhlířský vrch volcano, Czech Republic. \textit{BULLETIN OF VOLCANOLOGY}. UNITED STATES: SPRINGER, 2025, roč.~87, č.~12, s.~1-19. ISSN~0258-8900. Dostupné z: https://doi.org/10.1007/s00445-025-01921-1.

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