Record details

Title
    Saxothuringian-Moldanubian suture and prediposition of seismicity in the western Bohemian Massif
Statement of responsibility
    Vladislav Babuška, Jaroslava Plomerová
Author
    Babuška, Vladislav
    Plomerová, Jaroslava
Language
    anglicky
Source title - serial
    Studia geophysica et geodaetica
Vol./nr.
    Roč. 44, č. 2
Pages
    s. 292-306
Year
    2000
Notes
    4 obr., 5 s.bibl.
    il.
    Zkr. název ser.: Stud. geophys. geod. (Praha)
Subject group
    anizotropie
    kůra kontinentální
    litosféra
    měření seizmické
    moldanubikum
    saxothuringikum
    seizmicita
    tektonika bloková
    tepelské krystalinikum
    zemětřesný roj
    zóna suturová
Geographical name
    ČR-Čechy
Keyword
    Bohemian
    Massif
    Prediposition
    Saxothuringian-Moldanubian
    Seismicity
    Suture
    Western
Abstract (in english)
   We modelled the thickness and seismic anisotrophy of the subcrustal lithosphere from the variations of P-wave delay times and the shear-wave splitting observed at seismological observatories and portable stations in the western part of the Bohemian Massif. The Saxothuringian lithosphere is characterized by a total thickness between 90 and 120 km, the Moldanubian lithosphere is generally thicker - 120-140 km, on the average. The subcrustal lithosphere of both units is characterised by divergently dipping anisotrophic structures and the suture between them is marked by a lithosphere thinning to about 80 km. Within the subcrustal lithosphere a complex structure of the transition of both units extends to about 150 km toward the south. We suggest that the Saxothuringian-Moldanubian suture has created a zone of mechanical predisposition for the Tertiary Ohře (Eger) Graben, as well as for the occurrence of earthquake swarms in the region.
   Most earthquakes occur within the brittle part of the upper crust above the crossing of the suture between the Saxothuringian in the north and the Moldanubian and the Teplá-Barrandian in the south, with the tectonically active Mariánské Lázně fault
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    25. 3. 2008
Import date
    8. 8. 2012