Geophysical evidence of the Eastern Marginal Fault of the Cheb Basin (Czech Republic)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10389337" target="_blank" >RIV/00216208:11310/18:10389337 - isvavai.cz</a>

Alternative codes found

RIV/67985530:_____/18:00489016 RIV/67985891:_____/18:00489016

Result on the web

<a href="https://doi.org/10.1007/s11200-017-0452-9" target="_blank" >https://doi.org/10.1007/s11200-017-0452-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11200-017-0452-9" target="_blank" >10.1007/s11200-017-0452-9</a>

Result language

angličtina

Original language name

Geophysical evidence of the Eastern Marginal Fault of the Cheb Basin (Czech Republic)

Original language description

The western part of the Bohemian Massif hosts an intersection of two regional fault zones, the SW-NE trending Ohe/Eger Graben and the NNW-SSE trending Marianske Lazne Fault, which has been reactivated several times in the geological history and controlled the formation of the Tertiary Cheb Basin. The broader area of the Cheb Basin is also related to permanent seismic activity of M-L 3+ earthquake swarms. The Eastern Marginal Fault of the Cheb Basin (northern segment of the Marianske Lazne Fault) separates the basin sediments and underlying granites in the SW from the Krune Hory/Erzgebirge Mts. crystalline unit in the NE. We describe a detailed geophysical survey targeted to locating the Eastern Marginal Fault and determining its geometry in the depth. The survey was conducted at the Kopanina site near the Novy Kostel focal zone, which shows the strongest seismic activity of the whole Western Bohemia earthquake swarm region. Complex geophysical survey included gravimetry, electrical resistivity tomography, audiomagnetotellurics and seismic refraction. We found that the rocks within the Eastern Marginal Fault show low resistivity, low seismic velocity and density, which indicates their deep fracturing, weathering and higher water content. The dip of the fault in shallow depths is about 60 degrees towards SW. At greater depths, the slope turns to subvertical with dip angle of about 80 degrees. Results of geoelectrical methods show blocky fabric of the Cheb Basin and deep weathering of the granite bedrock, which is consistent with geologic models based on borehole surveys.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

<a href="/en/project/GC16-10116J" target="_blank" >GC16-10116J: Late Cenozoic to present tectonic activity of the western Eger Rift</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Studia Geophysica et Geodaetica

ISSN

0039-3169

e-ISSN

—

Volume of the periodical

62

Issue of the periodical within the volume

4

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

21

Pages from-to

660-680

UT code for WoS article

000450595100007

EID of the result in the Scopus database

2-s2.0-85048258047