Present-day stress inversion from a single near-surface fault: A novel mathematical approach

Sokol, Ľuboš; Melichar, Rostislav; Baroň, Ivo

doi:10.1016/j.jsg.2018.09.013

Cited by 10 publications

(1 citation statement)

References 24 publications

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“…So far there is not enough data from caves to unequivocally state whether the displacements are co-seismic or creep or a mixture of both. The present-day kinematic behavior of active faults in the Eastern Alps reveals a variety of different displacement modes at the micrometer level 29 and associated near-surface crustal stress variations 35 due to interplaying tectonic crustal processes and gravitational relaxation 36 . The macroscopic observation shows mm to cm-scale present-day co-seismic displacements resulting in speleothems damage, as observed after the 2017 Mw 6.6 Bodrum–Kos earthquake in Greece 18 or in Obir Cave where the 1976 Mw 6.7 Friuli earthquake dislocated dripstone column 17 .…”

Section: Discussionmentioning

confidence: 99%

Post-Miocene tectonics of the Northern Calcareous Alps

Szczygieł

Baroň

Melichar

et al. 2022

Sci Rep

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The Late Cretaceous orogeny followed by the Eocene collision of the Adriatic with the European plate dissected the Northern Calcareous Alps (NCA) by a number of well-studied strike-slip fault systems accommodating N-S shortening and E-W stretching. However, the post-Miocene fault activity is poorly constrained due to lack of Neogene faulted sediments, and glacial erosion of geomorphic indicators. Using the protected environment of caves, we fill the knowledge gap in the post-Miocene evolution of the NCA by paleostress analysis of 172 reactivated faults that offset passages in 28 caves near major faults. Constrained maximum age of caves, our results indicate that the NCA have been subjected to N to NE trending compression since Pliocene. Faulted speleothems dated with 230Th/U method, indicate that the recorded present-day stress state did not significantly change during the last 0.5 Ma. In contrast to the previously proposed post-Miocene N-S extension of NCA, but in agreement with what was observed in Vienna and Pannonian basins, we conclude that the eastward extrusion resulting from N-S convergence has continued despite a distinct slowdown of plate tectonic velocities in the late Miocene. The N-S extension affected only the Alpine front during Pliocene Molasse basin inversion, while at the scale of the Alpine orogen the NCA underwent successive N-S shortening and E-W stretching.

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