Altenberg–Teplice Caldera sourced Westphalian fall tuffs in the central and western Bohemian Carboniferous basins (eastern Variscan belt)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F22%3A00554669" target="_blank" >RIV/67985831:_____/22:00554669 - isvavai.cz</a>

Alternative codes found

RIV/00025798:_____/22:00000007 RIV/00216208:11310/22:10441082

Result on the web

<a href="https://www.tandfonline.com/doi/full/10.1080/00206814.2020.1858357?scroll=top&needAccess=true" target="_blank" >https://www.tandfonline.com/doi/full/10.1080/00206814.2020.1858357?scroll=top&needAccess=true</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/00206814.2020.1858357" target="_blank" >10.1080/00206814.2020.1858357</a>

Result language

angličtina

Original language name

Altenberg–Teplice Caldera sourced Westphalian fall tuffs in the central and western Bohemian Carboniferous basins (eastern Variscan belt)

Original language description

Timing of magmatic activity of the late-Variscan Altenberg–Teplice Caldera was rather vaguely constrained. In this paper, we present five new laser ablation inductively coupled plasma mass spectrometry (LA–ICP–MS) U–Pb zircon ages, which along with published data indicate ~13 Myr lifetime. Formation of the Altenberg–Teplice Caldera commenced with the emplacement of the pre-caldera pluton at ~325–319 Ma, and terminated with the intrusion of the syn-collapse ring dykes and post-collapse granites at ~312 Ma. The main ignimbrite volcanism in the area of the ATC occurred at ~318–313 Ma and peaked at ~314–313 Ma. The latter corresponds to the age of the caldera-forming eruptions, which sourced the extra-caldera pyroclastic deposits. The same age yielded the rhyolite dyke swarm that fed the ignimbrite eruptions. Some pyroclastic fall deposits preserved in adjacent Carboniferous basins indicate similar ages of ~314–312 Ma including the widespread ~314 Ma Bělka tuff, which represents the main chronostratigraphic marker of this area. Its thickness and grain size progressively degrease from the ATC towards S and SW. This, together with the isopach map distribution and the available geochronological data suggest that the Bělka tuff was sourced from the Altenberg–Teplice Caldera. The Bělka tuff distribution and its association with the extra-caldera ignimbrites of the Altenberg–Teplice Caldera imply that this tuff is a co-ignimbrite fall deposit that accompanied pyroclastic density currents sourced from the caldera. The calculated minimum volume of fallout ash-tuffs and extra-caldera ignimbrite facies contribute 30 km3 to the 350 km3 (dense rock equivalent) estimates of the total Altenberg–Teplice Caldera products. Such volumes correspond well to similar modern analogues of collapse calderas of intermediate size.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

10507 - Volcanology

Project

<a href="/en/project/GJ19-02177Y" target="_blank" >GJ19-02177Y: Magma transfer and emplacement processes in collapsing orogens</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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

Name of the periodical

International Geology Review

ISSN

0020-6814

e-ISSN

1938-2839

Volume of the periodical

64

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

28

Pages from-to

441-468

UT code for WoS article

000606699600001

EID of the result in the Scopus database

2-s2.0-85099375183