Seismic reflection surveys of the Krško basin structure: implications for earthquake hazard at the Krško nuclear power plant, southeast Slovenia

Gosar, Andrej

doi:10.1016/s0926-9851(98)00022-6

Cited by 10 publications

(11 citation statements)

References 15 publications

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“…The fi nal stage in the for ma tion of these folds, which com menced dur ing the lat est Mio cene (ca. 6 Ma) un der a N-S to NW-SE di rected short en ing, is well-doc umented by out crop struc tural anal y ses and seis mic re flec tion data (e.g., Fodor et al, 1998;Gosar, 1998;Prelogoviae et al, 1998;Vrabec, 1999;Tomljenoviae and Csontos, 2001). In ad dition to fold ing, the short en ing was ac com mo dated by per va sive brit tle de for ma tion and the for ma tion of E-W-strik ing re verse faults.…”

Section: Geological and Tectonic Settingmentioning

confidence: 83%

“…by 70 metres of ver ti cal off set of a Plio cene coal-seam along the Šoštanj Fault (ŠF in Fig. 1; Vrabec, 1999), by tilt ing and fold ing of Up per Mio cene-Plio cene strata (Gosar, 1998), by an off set of Pleis to cene de pos its along both limbs of the Krško Syncline 25 km NW of Mt. Medvednica (Verbiè, 2005), and by fold ing and pre sum ably fault ing of the basal Plio cene-Qua ter nary strata along the North ern Medvednica Bound ary Fault, as ob served in seis mic sec tions (NMBF in Fig.…”

Section: Geological and Tectonic Settingmentioning

confidence: 99%

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Identification of tectonically active areas using DEM: a quantitative morphometric analysis of Mt. Medvednica, NW Croatia

Matoš

Tomljenović

Trenc

2013

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1 Fac ulty of Min ing, Ge ol ogy and Pe tro leum En gi neer ing, Uni ver sity of Zagreb, Pierottijeva 6, Zagreb, Croatia Mt. Medvednica is an inselberg in NW Croatia, which lies at the in ter sec tion be tween the Southeastern Alps, Northwestern Dinarides and Tisza Mega-Unit of the Pannonian Ba sin. Due to the Pliocene-Quaternary N-S di rected short en ing, Mt. Medvednica ex pe ri enced 1500-2000 m of dif fer en tial up lift and now ex poses pre-Neo gene and Neo gene tec tonic and stratigraphic units that are sur rounded by Pliocene-Quaternary sed i ments. This pa per eval u ates a set of quan ti ta tive morphometry meth ods used to iden tify tec toni cally ac tive ar eas within this re gion characterized by low-rate ac tive fold ing and fault ing dur ing the Pliocene-Quaternary. Our anal y sis em ployed ex trac tion of hypsometric curves, cal cu la tion of a hypsometric in te gral, asym me try fac tor, and sta tis ti cal pa ram e ters of lon gi tu di nal stream pro files along 36 drain age bas ins de lin eated from a 25 m res o lu tion DEM of Mt. Medvednica area. De spite lithological het er o ge ne ity of the study area, the morphometric pa ram e ters we ob tain are good in di ca tors for dis crim i nat ing tec toni cally ac tive from in ac tive ar eas. We in terpret that the most tec toni cally ac tive ar eas are lo cated at the SW cor ner and in the cen tral part of Mt. Medvednica, where they are likely re lated to the North Medvednica Bound ary Fault, and to the Kašina Fault, re spec tively. The lat ter di vides the range into dis tinct NE and SW mor pho log i cal and struc tural ar eas.

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Section: Geological and Tectonic Settingmentioning

confidence: 83%

Section: Geological and Tectonic Settingmentioning

confidence: 99%

Identification of tectonically active areas using DEM: a quantitative morphometric analysis of Mt. Medvednica, NW Croatia

Matoš

Tomljenović

Trenc

2013

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“…Their neotectonic importance is supported by earthquake focal mechanisms, which predominantly illustrate a strike-slip stress regime with a NNW-SSE directed s 1 axis (POLJAK et al, 2000;KASTELIC et al, 2008;HERAK et al, 2009;KASTELIC et al, 2013). Recent NNW-SSE oriented contraction is also evident from regional GPS data analysis (WEBER et al, 2006;WE-BER et al, 2010), analysis of geomorphic markers (JAMŠEK RUPNIK et al, 2014;MOULIN et al, 2014;ŽIBRET & ŽIBRET, 2014), and geophysical investigations (GOSAR, 1998;BAVEC et al, 2012;ZAJC et al, 2015). Spatial analysis of earthquake events demonstrates complex interactions in the fault zones, likely controlled by their complex geometry originating in their polyphase tectonic evolution (e.g.…”

Section: Palaeostress and Kinematic Evolution Of The Orogen-parallel mentioning

confidence: 99%

Paleostress and kinematic evolution of the orogen-parallel NW-SE striking faults in the NW External Dinarides of Slovenia unraveled by mesoscale fault-slip data anaysis

Žibret¹,

Vrabec²

2016

Geol Cro

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The late Eocene to Recent dynamics of the NW External Dinarides in Slovenia are described. The study is focused on the orogen-parallel NW-SE striking family of faults, which represent the main source of seismic hazard in the NW External Dinarides today. Approximately 1700 faultslip datasets were collected at 70 locations and used for palaeostress analysis. Structural relationships observed in the field, allowed the construction of a relative chronology between the documented fault and shear joint sets, facilitating the reconstruction of their kinematic evolution and the chronology of palaeostress phases. Four post-Palaeocene stress tensor groups are documented corresponding to four distinct tectonic phases. The first phase is marked by NE-SW directed compression attributed to Late Eocene top-to-SW thrusting of External Dinarides. The second phase is characterized by NE-SW oriented tension, documented by normal slips recorded on NW-SE striking faults. This tension is interpreted as an expression of the Early to Middle Miocene back-arc extension in the Pannonian basin system that also affected the studied part of the External Dinarides. The third phase is manifested by approximately E-W oriented compression with approximately N-S oriented tension in a strike-slip stress regime, causing sinistral reactivation of NW-SE trending faults. Geodynamically, this phase can be correlated with the Late Miocene short pulse of E-W directed compression, documented in parts of the Pannonian basin system. The youngest phase is characterized by approximately N-S oriented compression and approximately E-W oriented tension in a strike-slip stress regime, which caused dextral reactivation of NW-SE striking faults. This phase correlates with the recent inversive/transpressive phase, well-established from seismological data.

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“…To improve the geologic model of the Krško basin, a high-resolution seismic reflection method was used in an earthquake hazard assessment study of the Krško NPP site in 1995 (Gosar, 1998). A 13 km long profile was recorded in two segments (P-3/95 and P-4/95) across the Krško basin (seismic profile I-II in Fig.…”

Section: Previous Seismic Reflection Profiling Across the Eastern Parmentioning

confidence: 99%

Untitled

2020

Geologija

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Seismic reflection surveys of the Krško basin structure: implications for earthquake hazard at the Krško nuclear power plant, southeast Slovenia

Cited by 10 publications

References 15 publications

Identification of tectonically active areas using DEM: a quantitative morphometric analysis of Mt. Medvednica, NW Croatia

Identification of tectonically active areas using DEM: a quantitative morphometric analysis of Mt. Medvednica, NW Croatia

Paleostress and kinematic evolution of the orogen-parallel NW-SE striking faults in the NW External Dinarides of Slovenia unraveled by mesoscale fault-slip data anaysis

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