Acta Geodynamica et Geomaterialia

Title: THE NEWLY DISCOVERED NEOGENE MAAR VOLCANO NEAR THE MARIANSKE LAZNE, WESTERN BOHEMIA
Authors: Valenta Jan, Rapprich Vladislav, Skácelová Zuzana, Gaždová Renata and Fojtíková Lucia
DOI: 10.13168/AGG.2013.0061
Journal: Acta Geodynamica et Geomaterialia, Vol. 11, No. 2 (174), Prague 2014
Full Text: PDF file (5.7 MB)
Keywords: Maar, Diatreme, Gravity survey, Magnetic survey, Neogene volcanism
Abstract: The local magnetic maxima near the village Rájov (NE of Mariánské Lázně) revealed by airborne magnetometry was further surveyed using ground gravimetry and magnetometry. The measured magnetic data revealed a positive magnetic anomaly in the centre of the surveyed area. The measured gravity data showed two small-scale gravity minima. The geophysical data are interpreted by a presence of the maar-diatreme volcano, basic intrusions, and a lava flow filling the maar crater. The overall interpretation suggests, that volcanism in this area probably started with the phreatomagmatic eruption of the Rájov maar and then continued with the Strombolian eruption of the nearby Podhorní vrch volcano.