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@article{801684,
author = {Švancara, Jan and Havíř, Josef and Conrad, Werner and Havíř, Josef},
article_location = {Praha},
article_number = {4},
doi = {http://dx.doi.org/10.1007/s11200-008-0038-7},
keywords = {Bouguer gravity; seismicity; reduced stress tensor; fault reactivation potential; Mariánské Lázně Fault Zone; Gera-Jáchymov Fault Zone; Eger Graben; Rostock-Leipzig-Regensburg Zone},
language = {eng},
issn = {0039-3169},
journal = {STUDIA GEOPHYSICA ET GEODETICA},
title = {Derived gravity field of the seismogenic upper crust of SE Germany and West Bohemia and its comparison with seismicity},
url = {http://www.ipe.muni.cz/newweb/cesky/index.php?main=publikace/publikace.php&open=1&menu=8000},
volume = {52},
year = {2008}
}
TY - JOUR
ID - 801684
AU - Švancara, Jan - Havíř, Josef - Conrad, Werner - Havíř, Josef
PY - 2008
TI - Derived gravity field of the seismogenic upper crust of SE Germany and West Bohemia and its comparison with seismicity
JF - STUDIA GEOPHYSICA ET GEODETICA
VL - 52
IS - 4
SP - 567-588
EP - 567-588
PB - StudiaGeo Praha
SN - 00393169
KW - Bouguer gravity
KW - seismicity
KW - reduced stress tensor
KW - fault reactivation potential
KW - Mariánské Lázně Fault Zone
KW - Gera-Jáchymov Fault Zone
KW - Eger Graben
KW - Rostock-Leipzig-Regensburg Zone
UR - http://www.ipe.muni.cz/newweb/cesky/index.php?main=publikace/publikace.php&open=1&menu=8000
L2 - http://www.ipe.muni.cz/newweb/cesky/index.php?main=publikace/publikace.php&open=1&menu=8000
N2 - The gravity field of the seismogenic upper crust was derived from the Bouguer gravity map by applying the Butterworth high-pass filter in the wave-number domain. The cutoff wavelength of the filter was 110 km, to pass the gravity signals of structures within the 18 km thick seismogenic layer. The derived residual gravity map reveals potential stress concentrating structures, which may cause seismicity provided they lie within the existing zones of weakness. Furthermore we derived a shaded relief map of the horizontal gravity gradient, which highlighted the tectonic lines accompanied by density contrast. The directional analysis of this map shows three dominant strike directions. The most prominent one is the Hercynian NW-SE strike direction represented by the Franconian Line, the Gera-Jáchymov Fault Zone and the Elbe Zone. The second dominant strike is the Rhenisch NNE-SSW trending represented by the Upper Rhine Graben Zone, Rheinsberg- Heldburg Line and several Proterozoic volcanic belts in the Teplá-Barrandien Unit. The third pronounced trending of the ENE-WSW direction is represented by the Erzgebirge and Eger Graben gravity low. The N-S trending Rostock-Leipzig-Regensburg Zone(Pritzwalk-Naab Lineament) is not distinctly reflected in the derived gravity maps, although many fault segments have a meridian direction. The relative reactivation potential of some pre-existing fault systems identified in the gravity map was studied with respect to the wide range of the recent stress configuration determined in the West Bohemia/Vogtland region. The resulting diagrams show that the steep NNW-SSE to N-S faults (represented by some segments of the Mariánské Lázně Fault Zone) are oriented favourably for reactivation. On the contrary, the orientation of the ENE-WSW faults limiting the Eger Graben (Litoměřice Fault, etc.) is unfavourable for reactivation for all dip values
ER -
ŠVANCARA, Jan, Josef HAVÍŘ a Werner CONRAD. Derived gravity field of the seismogenic upper crust of SE Germany and West Bohemia and its comparison with seismicity. \textit{STUDIA GEOPHYSICA ET GEODETICA}. Praha: StudiaGeo Praha, 2008, roč.~52, č.~4, s.~567-588. ISSN~0039-3169. Dostupné z: https://dx.doi.org/10.1007/s11200-008-0038-7.
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