Lithospheric temperature response to asthenosphere updoming and the upper mantle-crustal magmatic underplating in the Western Ohre (Eger) Rift area, Czechia

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/00216208:11310/25:10500469 RIV/00025798:_____/25:10169522

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Lithospheric temperature response to asthenosphere updoming and the upper mantle-crustal magmatic underplating in the Western Ohre (Eger) Rift area, Czechia

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Lithospheric temperature response to asthenosphere updoming and the upper mantle-crustal magmatic underplating in the Western Ohre (Eger) Rift area, Czechia

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GF23-07490K" target="_blank" >GF23-07490K: MUSE: vmísťování magmatu a zemětřesné roje</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Tectonophysics

ISSN

0040-1951

e-ISSN

1879-3266

Svazek periodika

911

Číslo periodika v rámci svazku

Aug.

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

230836

Kód UT WoS článku

001532249800001

EID výsledku v databázi Scopus

2-s2.0-105009282828