From Magma Formation to Eruption: Temperature Path of Two Late Carboniferous Post‐Collisional Calderas (Bohemian Massif)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F25%3A00635575" target="_blank" >RIV/67985831:_____/25:00635575 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/25:10500319

Výsledek na webu

<a href="https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025GC012217" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025GC012217</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2025GC012217" target="_blank" >10.1029/2025GC012217</a>

Jazyk výsledku

angličtina

Název v původním jazyce

From Magma Formation to Eruption: Temperature Path of Two Late Carboniferous Post‐Collisional Calderas (Bohemian Massif)

Popis výsledku v původním jazyce

The thermal evolution of magmatic systems of the Altenberg‐Teplice and Tharandter Wald calderas, which erupted during the terminal post‐collisional phase of the Variscan orogeny in the Bohemian Massif, was investigated. The zircon saturation temperatures and Ti‐in‐zircon thermometer indicate that the intrusive and extrusive units of the two calderas were sourced from medium‐ to high‐temperature (∼770–930°C) felsic lower crustal magma. Using an integrated rock‐magnetic and paleomagnetic approach through thermal demagnetization and stepwise thermomagnetic curves, it was estimated that intracaldera ignimbrites reached temperatures of 550–600°C. The low‐temperature component (350–450°C) likely corresponds to the alteration of magnetic minerals during cooling or late‐stage magmatic/hydrothermal events. Placing these findings in the broader context of Variscan post‐collisional magmatism might suggest a trend of decreasing magma temperatures from 330 Ma to 302 Ma within the two lower‐to mid‐crustal (Moldanubian) and upper‐crustal (Saxothuringian) units of the Bohemian Massif, possibly reflecting the cooling of the hot collisional orogen. Lastly, we suggest that a combination of zircon temperature estimates with the rock‐magnetic methods may provide a comprehensive framework for further research on the thermal evolution of felsic magmatic systems.

Název v anglickém jazyce

From Magma Formation to Eruption: Temperature Path of Two Late Carboniferous Post‐Collisional Calderas (Bohemian Massif)

Popis výsledku anglicky

The thermal evolution of magmatic systems of the Altenberg‐Teplice and Tharandter Wald calderas, which erupted during the terminal post‐collisional phase of the Variscan orogeny in the Bohemian Massif, was investigated. The zircon saturation temperatures and Ti‐in‐zircon thermometer indicate that the intrusive and extrusive units of the two calderas were sourced from medium‐ to high‐temperature (∼770–930°C) felsic lower crustal magma. Using an integrated rock‐magnetic and paleomagnetic approach through thermal demagnetization and stepwise thermomagnetic curves, it was estimated that intracaldera ignimbrites reached temperatures of 550–600°C. The low‐temperature component (350–450°C) likely corresponds to the alteration of magnetic minerals during cooling or late‐stage magmatic/hydrothermal events. Placing these findings in the broader context of Variscan post‐collisional magmatism might suggest a trend of decreasing magma temperatures from 330 Ma to 302 Ma within the two lower‐to mid‐crustal (Moldanubian) and upper‐crustal (Saxothuringian) units of the Bohemian Massif, possibly reflecting the cooling of the hot collisional orogen. Lastly, we suggest that a combination of zircon temperature estimates with the rock‐magnetic methods may provide a comprehensive framework for further research on the thermal evolution of felsic magmatic systems.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GJ19-02177Y" target="_blank" >GJ19-02177Y: Procesy transferu a vmístění magmatu v kolabujících orogenech</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

Geochemistry, Geophysics, Geosystems

ISSN

1525-2027

e-ISSN

1525-2027

Svazek periodika

26

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

24

Strana od-do

e2025GC012217

Kód UT WoS článku

001493072500001

EID výsledku v databázi Scopus

2-s2.0-105006761804