Almost eroded but still there: Oldest diatreme volcanoes of pre-Quaternary age in the eastern Bohemian Massif, Czechia

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F25%3A00618252" target="_blank" >RIV/67985891:_____/25:00618252 - isvavai.cz</a>

Alternative codes found

RIV/61989100:27350/25:10257751 RIV/00216208:11310/25:10500460 RIV/00025798:_____/25:10169521

Result on the web

<a href="https://doi.org/10.1016/j.geomorph.2025.109668" target="_blank" >https://doi.org/10.1016/j.geomorph.2025.109668</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.geomorph.2025.109668" target="_blank" >10.1016/j.geomorph.2025.109668</a>

Result language

angličtina

Original language name

Almost eroded but still there: Oldest diatreme volcanoes of pre-Quaternary age in the eastern Bohemian Massif, Czechia

Original language description

Young volcanic forms are often well pronounced in topography and preserve valuable geological record ofnpaleoenvironmental evolution. However, in ancient volcanic fields (Ma old), some volcanic landforms may existnonly as erosional remnants that are completely transformed by long-term denudation. The identification of suchnstructures is challenging owing to their small size and subtle geomorphic signature. Earlier magnetic surveysnfrom the 1960s identified a minor volcanic form of unclear origin at a site within the Brunt´al Volcanic Field, anLate Cenozoic intraplate volcanic province in Central Europe (Czechia). Newly conducted high-resolutionnmagnetic, gravity, and geoelectrical surveys of the site revealed remnants of two deeply eroded diatremes andntheir feeder dykes. Analysis of the collected samples and excavated material from shallow trenches supports thenphreatomagmatic origin of these structures. The two analogous circular diatremes, separated by a distance ofn750 m, exhibit pronounced magnetic and conductive responses. Their small diameters (<100 m), coupled withnminor negative gravity anomalies and the presence of excavated diatreme breccias, suggest the exposure of andeep part of the diatremes, e.g. root-zones, at the current erosional surface. The material buried in the diatremesnalso allows for the deduction of the previous extent of concurrently eroded Neogene sediments in the area.nDespite unsuccessful attempts at Ar–Ar dating, the Neogene age assumed based on the deep erosional level of thenvolcanic vents makes them the oldest known maar-diatreme volcanoes in the eastern Bohemian Massif. Thisnstudy provides very rare information about explosive volcanism in the area of northeastern margin of the Bo-nhemian Massif and is the first-ever study on regional pre-Quaternary phreatomagmatism in the Brunt´al VolcanicnField.

Czech name

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Czech description

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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/GA21-30043S" target="_blank" >GA21-30043S: Petrogenesis and emplacement of deep-marine alkaline basaltoids: a case of Early Cretaceous magmatism in the northern Tethys region</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Geomorphology

ISSN

0169-555X

e-ISSN

1872-695X

Volume of the periodical

475

Issue of the periodical within the volume

April

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

12

Pages from-to

109668

UT code for WoS article

001428866500001

EID of the result in the Scopus database

2-s2.0-85217969265