Acceleration of Late Pleistocene activity of a Central European fault driven by ice loading
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F22%3A00559743" target="_blank" >RIV/67985891:_____/22:00559743 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14310/22:00129110
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0012821X22002321" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0012821X22002321</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.epsl.2022.117596" target="_blank" >10.1016/j.epsl.2022.117596</a>
Alternative languages
Result language
angličtina
Original language name
Acceleration of Late Pleistocene activity of a Central European fault driven by ice loading
Original language description
We studied the southern part of the NW-SE trending Sudetic Marginal fault (SMF), situated at the northeastern limit of the Bohemian Massif in central Europe, to assess its Quaternary activity. Eighteen trenches and thirty-four electric resistivity profiles were performed at Bila Voda to study the fault zone and 3-dimensional distribution of a beheaded alluvial fan on the NE side of the fault. We interpret a small drainage, located about 29-45 m to the SE of the fan apex, as the only plausible source channel implying a similar amount of left-lateral offset. The alluvial fan deposits' radiometric ages range between about 24 and 63 ka, but postglacial deposits younger than 11 ka are not displaced, indicating that all motion occurred in the late Pleistocene. The site lies similar to 150 km south of the late Pleistocene Weichselian maximum (similar to 20 ka) ice sheet front. We model the effects of the ice load on lithospheric flexure and resolved fault stresses, and show that slip on the SMF was promoted by the presence of the ice sheet, resulting in a late Pleistocene slip rate of similar to 1.1(+2.3)/(-0.6) mm/yr. As the most favorable time for glacial loading-induced slip would be during the glacial maximum between about 24 and 12 ka, it is doubtful that the slip rate remained constant during the entire period of activity, and if most slip occurred during this period, the short-term rate may have been even higher. Considering that the modern maximum principal stress (sigma(1)) is oriented nearly parallel to the Sudetic Marginal fault (NNW-SSE) and is thus unfavorable for fault motion, our observations suggest that the likelihood of continued motion and earthquake production is much lower in the absence of an ice sheet.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Earth and Planetary Science Letters
ISSN
0012-821X
e-ISSN
1385-013X
Volume of the periodical
591
Issue of the periodical within the volume
AUG 1
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
12
Pages from-to
117596
UT code for WoS article
000812307000004
EID of the result in the Scopus database
2-s2.0-85130610322