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Discovery of the first Quaternary maar in the Bohemian Massif, Central Europe, based on combined geophysical and geological surveys

SYSNO ASEP	0330220
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Discovery of the first Quaternary maar in the Bohemian Massif, Central Europe, based on combined geophysical and geological surveys
Author(s)	Mrlina, Jan (GFU-E)_{ORCID, RID} Kämpf, H. (DE) Kroner, C. (DE) Mingram, J. (DE) Stebich, M. (DE) Brauer, A. (DE) Geissler, W.H. (DE) Kallmeyer, J. (DE) Matthes, H. (DE) Seidl, Michal (GFU-E)_{ORCID, RID}
Source Title	Journal of Volcanology and Geothermal Research. - : Elsevier - ISSN 0377-0273 Roč. 182, č. 1-2 (2009), s. 97-112
Number of pages	16 s.
Language	eng - English
Country	NL - Netherlands
Keywords	Eger Rift ; Quaternary maar volcanism ; geophysical survey ; Saalian lake sediments ; volcanic hazard potential
Subject RIV	DC - Siesmology, Volcanology, Earth Structure
R&D Projects	IAA300460602 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
CEZ	AV0Z30120515 - GFU-E (2005-2011)
UT WOS	000265900500009
DOI	10.1016/j.jvolgeores.2009.01.027
Annotation	Based on results of previous investigations of tephra-tuff volcaniclastic deposits and a geophysical survey in the surroundings of the Železná hůrka Quaternary volcano, West Bohemia, we performed detailed geophysical surveys using gravimetry, magnetometry and electrical conductivity techniques. Striking anomalies were revealed in a morphological depression near Mýtina,West Bohemia, as a strong evidence of the assumed maar-diatreme structure. The sharp isometric gravity low of−2.30 mGal, aswell as the corresponding positive magnetic anomaly of 200 nT with a negative rim on its northern side indicate a steeply dipping geological body of low density and containing magnetic rocks/minerals. Magnetic survey also showed pronounced local anomalies outside the depression that can reflect relicts of the tephra rim of the maar.
Workplace	Geophysical Institute
Contact	Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028
Year of Publishing	2010

Number of the records: 1