En echelon fractures in a dextral shear zone - tectonic heritage for a hydrothermal cave (Budapest, Hungary)

L. Fodor, S. Leel-Ossy, G. Tari

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Microtectonic study of brittle structures in the Jozsef Hill Cave, highlights the connection between different phases of fracturing and cave formation. E-W trending dextral faults (second order Riedels) and NW-SE oriented tension fractures developed in a ENE-WSW trending dextral shear zone as a result of WNW-ESE directed compression. Ascending thermal water dissolved cave galleries and created barite veins along these fractures. The first stage of cave formation as inferred from timing of fracturation from the regional stress field was Oligocene-Early Miocene. Between the Middle Miocene and Quaternary new N-S to NE-SW trending normal faults were formed by ESE-WNW extension. Pleistocene differential uplift resulted in the reactivation and enlarging of fault zones, dominantly the E-W trending older Riedels. These recent tectonic events enhanced the original en echelon geometry of the older cave corridors. -Authors

Original languageEnglish
Pages (from-to)165-170
Number of pages6
JournalTerra Nova
Volume4
Issue number2
Publication statusPublished - 1992

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cave
shear zone
tectonics
Miocene
thermal water
barite
reactivation
normal fault
stress field
Oligocene
fault zone
uplift
compression
Pleistocene
geometry

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

En echelon fractures in a dextral shear zone - tectonic heritage for a hydrothermal cave (Budapest, Hungary). / Fodor, L.; Leel-Ossy, S.; Tari, G.

In: Terra Nova, Vol. 4, No. 2, 1992, p. 165-170.

Research output: Contribution to journalArticle

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