Lithospheric temperature response to asthenosphere updoming and the upper mantle-crustal magmatic underplating in the Western Ohre (Eger) Rift area, Czechia
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F25%3A00638133" target="_blank" >RIV/67985530:_____/25:00638133 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/25:10500469 RIV/00025798:_____/25:10169522
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0040195125002227?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0040195125002227?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.tecto.2025.230836" target="_blank" >10.1016/j.tecto.2025.230836</a>
Alternative languages
Result language
angličtina
Original language name
Lithospheric temperature response to asthenosphere updoming and the upper mantle-crustal magmatic underplating in the Western Ohre (Eger) Rift area, Czechia
Original language description
The Western Ohre (Eger) Rift is characterized by frequent earthquake swarms, elevated CO2 emissions, and Pleistocene volcanism. Understanding the lithospheric temperature is an essential for integrating these phenomena within a broader geodynamic context. In order to contribute to these research goals, we modelled thermal evolution of the region using an axisymmetric geothermal model and numerically solved the transient heat conduction equation. The simulation begins at 35 Ma, when the asthenosphere uplifted from 100 km to 75 km depth within a 90-km diameter-wide region. This updoming was followed by two episodes of basaltic underplating at depths of 30-33 km during 15-10 Ma and 5-1 Ma. We modelled the underplating as a sequence of similar to 100 m thick intrusions, 30 km in diameter, emplaced at 1 Myr intervals. Each intrusion released latent heat of crystallization between the liquidus (1,387 degrees C) and solidus (720 degrees C) temperatures. The modelled lithospheric temperatures indicate that the 300 degrees C isotherm, often marking the brittle-ductile transition, is located at similar to 11 km depth, consistent with the lower extent of the local swarm seismicity range (6.5-11 km). The base of the magmatic underplating remains just above the solidus, suggesting the presence of partially molten material. The residual melt may contribute to the ongoing CO2 emissions observed in the area.
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
<a href="/en/project/GF23-07490K" target="_blank" >GF23-07490K: MUSE: Magmatic Underplating and Swarm Earthquakes</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Tectonophysics
ISSN
0040-1951
e-ISSN
1879-3266
Volume of the periodical
911
Issue of the periodical within the volume
Aug.
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
12
Pages from-to
230836
UT code for WoS article
001532249800001
EID of the result in the Scopus database
2-s2.0-105009282828