Faults of the Bohemian Massif

Source of Analytical Data on Main Faults and Faulted Areas with Seismic Potential

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dbz:diendorf-boskovice_fault

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dbz:diendorf-boskovice_fault [2024/05/29 16:39]
petrs [Diendorf - Boskovice fault system] 		dbz:diendorf-boskovice_fault [2025/10/16 11:39] (current)
petrs [Fault structure and dip]
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   *At BF, steep dip to the west (Zapletal 1924, 1929, Polák 1959) or east (Suess 1907; Zapletal 1924; Jaroš 1958) were observed. In case of the latter, observations of overturned Permian strata were reported from the fault neighborhood (Jaroš 1958). In the Miroslav horst and further south (BF_1 and 2) a steep western dip is indicated by natural outcrop in an erosional gully, observations in trenches and shallow geophysical profiles (**[[dbz:diendorf-boskovice_fault#Lesonice: Eroded fault scarp, Timing of last dip-slip|Lesonice]]**, **[[dbz:diendorf-boskovice_fault#Kadov: Observed sealing strata|Kadov]]** and **[[dbz:diendorf-boskovice_fault#Hostěradice: Observed sealing strata|Hostěradice]]**; Špaček et al. 2015a, 2017, 2018).   *At BF, steep dip to the west (Zapletal 1924, 1929, Polák 1959) or east (Suess 1907; Zapletal 1924; Jaroš 1958) were observed. In case of the latter, observations of overturned Permian strata were reported from the fault neighborhood (Jaroš 1958). In the Miroslav horst and further south (BF_1 and 2) a steep western dip is indicated by natural outcrop in an erosional gully, observations in trenches and shallow geophysical profiles (**[[dbz:diendorf-boskovice_fault#Lesonice: Eroded fault scarp, Timing of last dip-slip|Lesonice]]**, **[[dbz:diendorf-boskovice_fault#Kadov: Observed sealing strata|Kadov]]** and **[[dbz:diendorf-boskovice_fault#Hostěradice: Observed sealing strata|Hostěradice]]**; Špaček et al. 2015a, 2017, 2018).
   *In the commonly adopted models of the Boskovice graben (Jaroš 1961a; Malý 1993; Jaroš & Malý 2001) the BF is shown as a steeply east-dipping fault. However, it must be stressed that clear evidence for deeper geometry is missing and these models should be taken as the authors' concepts. The seismic reflection profile referred to by the authors was made at a short line south of Rosice  (Štelcl et al. 1985). Primary data is unavailable but generally low quality is expected considering the technical setting of the survey and the published line-drawing of the profile.    *In the commonly adopted models of the Boskovice graben (Jaroš 1961a; Malý 1993; Jaroš & Malý 2001) the BF is shown as a steeply east-dipping fault. However, it must be stressed that clear evidence for deeper geometry is missing and these models should be taken as the authors' concepts. The seismic reflection profile referred to by the authors was made at a short line south of Rosice  (Štelcl et al. 1985). Primary data is unavailable but generally low quality is expected considering the technical setting of the survey and the published line-drawing of the profile. 
-  *The importance of thrust component repeated in literature seems to me overrated. Local variations observed near the surface could partly represent flower structures related to the expected prevailing strike-slip kinematics of the post-Stephanian fault displacements.+  *The importance of reverse component repeated in literature seems to me overrated. Local variations observed near the surface could partly represent flower structures related to the expected prevailing strike-slip kinematics of the post-Stephanian fault displacements.
   *At DF, rare observations were reported from excavation near Maissau (DF_4; Posch-Trotzmüller and Peresson 2012) and quarry **[[dbz:diendorf-boskovice_fault#Limberg: Secondary faults|Limberg]]** (DF_4 to 5; secondary faults; Decker 1999). In both cases the faults are close to vertical.   *At DF, rare observations were reported from excavation near Maissau (DF_4; Posch-Trotzmüller and Peresson 2012) and quarry **[[dbz:diendorf-boskovice_fault#Limberg: Secondary faults|Limberg]]** (DF_4 to 5; secondary faults; Decker 1999). In both cases the faults are close to vertical.
  
dbz/diendorf-boskovice_fault.txt · Last modified: 2025/10/16 11:39 by petrs

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