a 2016

Geological and geophysical study of basic volcanic bodies. A case study from Říp hill, Czech Republic

SOKOL, Ľuboš; Jan ČERNÝ; Tomáš MARHANSKÝ; Lubomil POSPÍŠIL; Otakar ŠVÁBENSKÝ et al.

Základní údaje

Originální název

Geological and geophysical study of basic volcanic bodies. A case study from Říp hill, Czech Republic

Autoři

SOKOL, Ľuboš; Jan ČERNÝ; Tomáš MARHANSKÝ; Lubomil POSPÍŠIL a Otakar ŠVÁBENSKÝ

Vydání

14th Meeting of the Central European Tectonic Studies Group. 2016

Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Obor

10500 1.5. Earth and related environmental sciences

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Označené pro přenos do RIV

Ne

Organizační jednotka

Přírodovědecká fakulta

ISBN

978-80-223-4071-7

Klíčová slova anglicky

Volcanic rock; nephelinite; geophysics

Příznaky

Mezinárodní význam
Změněno: 13. 5. 2016 14:49, Mgr. Jan Černý, Ph.D.

Anotace

V originále

Geophysical and geological studies of basic volcanic bodies with high contrast of density and magnetic susceptibility in comparison with the hosting environment can help to understand internal structure of such bodies. Říp hill, which forms an isolated volcanic pipe emplaced in Cretaceous sediments, has been selected as an ideal object for such study. Říp hill consists of olivine poor nephelinite (Ulrych et al., 1998). Its high density (almost 3,2 g/cm3) and susceptibility (in order of magnitude X*10-2 SI) significantly contrast with the properties of hosting Cretaceous sedimentary rocks (relatively low density and magnetic susceptibility). In spite of its high density, this isolated volcanic body is depicted by a negative anomaly in the generally available maps of Bouguer anomalies. This is the case also for many other Cenozoic volcanic bodies in Bohemian Massif (Polanský, 1980). For that reason we have made new gravity and magnetic susceptibility measurements on the top of the hill and in the surrounding area. In addition, geological mapping and structural measurements were made to clarify the architecture of the volcanic pipe. All these data lead to better understanding of structure and evolution of Cenozoic volcanic bodies in the Bohemian Massif.