Emplacement History of the Miocene Zebín Tuff Cone (Czech Republic) Revealed From Ground Geophysics, Anisotropy of Magnetic Susceptibility, Paleomagnetic, and 40Ar/39Ar Geochronology Data

Petronis, M.; Valenta, Jan; Rapprich, V.; Lindline, J.; Heizler, M.; Wyk de Vries, van, B.; Shields, S.; Balek, Jan; Fojtíková, Lucia; Tábořík, Petr

doi:https://dx.doi.org/10.1029/2017GC007324

Number of the records: 1

Emplacement History of the Miocene Zebín Tuff Cone (Czech Republic) Revealed From Ground Geophysics, Anisotropy of Magnetic Susceptibility, Paleomagnetic, and 40Ar/39Ar Geochronology Data

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SYSNO ASEP	0502730
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Emplacement History of the Miocene Zebín Tuff Cone (Czech Republic) Revealed From Ground Geophysics, Anisotropy of Magnetic Susceptibility, Paleomagnetic, and 40Ar/39Ar Geochronology Data
Author(s)	Petronis, M. (US) Valenta, Jan (USMH-B)_{RID, ORCID} Rapprich, V. (CZ) Lindline, J. (US) Heizler, M. (US) Wyk de Vries, van, B. (FR) Shields, S. (US) Balek, Jan (USMH-B)_ORCID Fojtíková, Lucia (USMH-B)_{RID, ORCID} Tábořík, Petr (USMH-B)_{RID, ORCID}
Source Title	Geochemistry, Geophysics, Geosystems. - : Wiley Roč. 19, č. 10 (2018), s. 3764-3792
Number of pages	29 s.
Publication form	Print - P
Language	eng - English
Country	US - United States
Keywords	monogenetic volcanoes ; geophysics ; paleomagnetism ; geochronology ; Tertiary
Subject RIV	DC - Siesmology, Volcanology, Earth Structure
OECD category	Volcanology
Institutional support	USMH-B - RVO:67985891
UT WOS	000450640800010
DOI	10.1029/2017GC007324
Annotation	The Zebin Volcano, Czech Republic, is a quarried tuff cone that offers the opportunity to understand emplacement processes responsible for magma transport through a pyroclastic cone and magmatic processes involved in its development. A high-resolution ground magnetometry survey, electrical resistivity tomography, and refraction seismic were conducted to supplement field mapping of the size, shape, and inner structure of the volcanic system. The Zebin Volcano yields normal polarity rocks, and the cone is underlain by a complex and branching magma feeder system with several diverging dikes. Samples were collected at 24 sites from feeder dikes and the main conduit for anisotropy of magnetic susceptibility and paleomagnetic analysis. Anisotropy of magnetic susceptibility results yield inferred magma flow directions indicating subhorizontal magma flow toward and away from the axial conduit as well as both upward and downward flow. Paleomagnetic data from all sites are normal polarity with statistically distinct remanence directions between some sites that indicate that significant time passed or deformation occurred during the growth of this volcanic system. Ar-40/Ar-39 isochron ages of groundmass provide emplacement ages of 18.380.03 and 18.450.03Ma, whereas a weighted mean date of 18.520.03Ma for hornblende provides an eruption age. We argue that the Zebin Volcano evolved from a polyphase feeding system and through a complex feeder network. This detailed study shows that many monogenetic volcanoes deserve highly detailed study, as their subtleties can provide insight into broader crustal and magmatic environment during magmatism.
Workplace	Institute of Rock Structure and Mechanics
Contact	Iva Švihálková, svihalkova@irsm.cas.cz, Tel.: 266 009 216
Year of Publishing	2019

Number of the records: 1