Seismic model and geological interpretation of the basement beneath the Doupovské Hory Volcanic Complex (NW Czech Republic)

Valenta, J.; Brož, Milan; Málek, Jiří; Mlčoch, Bedřich; Rapprich, Vladislav; Skácelová, Zuzana

doi:10.2478/s11600-011-0009-1

Cited by 3 publications

(4 citation statements)

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“…The original steeply inclined planes were affected by erosion and transformed to set of parallel channels and ridges running down the slopes. The fault-scarps observed in the morphology correspond well to important regional faults described for the DHVC basement (e.g., Valenta et al 2011). The fault scarps are locally associated with areas dominated with large boulders -diastrophic blocks (VI), resulting from local gravity instabilities along the fault scarps.…”

Section: Conchagua Volcanosupporting

confidence: 60%

“…Later, lithospheric folding in the Alpine-Carpathian foreland and stretching along the crest of a growing regional-scale anticlinal feature resulted in an orthogonal extensional phase (Dèzes et al 2004; Bourgeois et al 2007;Rajchl et al 2009). Several geological units meet in the basement of the DHVC in the form of a heterogeneous crustal mosaic (Mlčoch & Konopásek, 2010;Valenta et al, 2011). Paragneisses, felsic granulites, orthogneisses, mica schists, and phyllites of the Saxothuringian Unit extend from the north in the basement of the DHVC.…”

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confidence: 99%

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Slope Dependent Morphometric Analysis as a Tool Contributing to Reconstruction of Volcano Evolution

Kopačková¹,

Rapprich²,

Šebesta³

et al. 2011

Earth and Environmental Sciences

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IntroductionPeople have been fascinated by volcanoes since time immemorial. This is mainly due to the serious consequences that volcanic eruptions represent for human society. Volcanic activity develops in various ways. Therefore, evolutionary trends and the history of the volcanic system should be well understood when future hazards must be predicted and their impact on human society reduced. A volcano's history can be reconstructed from its deposits, their superposition and spatial relationships. Geological mapping is the crucial method for acquiring this information. Unfortunately, large areas in volcanic zones are inaccessible for research directly in the field. In these areas, the geological setting must be investigated by a combination of remote sensing methods and field observations from accessible outcrops. Surface methods such as remote sensing and morphological analysis provide fast and relatively cheap information, complementary to classical field geology for studying the subsurface geology. These methods can be beneficial, especially for areas with poor accessibility and/or dense vegetation cover. Volcanoes or volcanic complexes quite often represent such areas. Land forms are a result of geologic and geomorphologic processes that occur on the earth's surface thus land forms are not chaotic, but have been structured by geologic and geomorphologic processes over time. The geomorphology of volcanic formations as a whole seems to be a reflection of the underlying geology with steep-sided land forms occurring at each of the "strong" rock units and long, with gentle slopes and topographic breaks found on "soft" rocks. To support this theory, we employed and tested new methodology combining information arising from field surveys together with visual interpretation and statistical spatial analysis of morphometric slope-depending classes to define the spatial extent of various volcanic formations and to identify major tectonic phenomena from features derived from the geomorphology in more accurate way. Study areasMorphometric analysis was applied to two case study areas, two volcanic complexes of distinct geotectonic setting, age and volcanic evolution. Selected volcanic areas encompass a www.intechopen.com Earth and Environmental Sciences 220 number of features and rock types associated with volcanic activity. The first case study was carried out in the Conchagua Volcanic Complex, El Salvador (Central America), while the second one was performed in the Doupovské hory Volcanic Complex, Czech Republic (Central Europe). Conchagua VolcanoThe Pacific coast of Central America is bordered by a chain of active subduction-related volcanoes. This chain is called the Central American Volcanic Arc (CAVA) and extends from Guatemala via El Salvador, southern Honduras, Nicaragua and Costa Rica to western Panama (e.g., Carr et al., 2003). The volcanic arc is associated with the subduction of the Cocos plate beneath the Caribbean plate and it is divided into several segments by traverse faults. Conchagua Volcano is located ...

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Section: Conchagua Volcanosupporting

confidence: 60%

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confidence: 99%

Slope Dependent Morphometric Analysis as a Tool Contributing to Reconstruction of Volcano Evolution

Kopačková¹,

Rapprich²,

Šebesta³

et al. 2011

Earth and Environmental Sciences

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“…Despite more than a hundred years of intensive geological studies new researches still alter the view. New data on setting of volcanoes and volcanic complexes in the Bohemian Massif can be provided also by geophysical surveys (e.g., Skácelová et al, 2009;Skácelová et al, 2010;Valenta et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

The newly discovered Neogene maar volcano near the Marianske Lazne, western Bohemia

Valenta¹

2013

Acta Geodynamica Et Geomaterialia

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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.

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“…2. Location of the Doupovské hory Volcanic Complex within the ECRIS (after Dézes et al, 2004)Several geological units meet in the basement of the DHVC in the form of a heterogeneous crustal mosaic(Mlčoch & Konopásek, 2010;Valenta et al, 2011). Paragneisses, felsic granulites, orthogneisses, mica schists, and phyllites of the Saxothuringian Unit extend from the north in the basement of the DHVC.…”

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confidence: 99%

Earth and environmental sciences

Thomas¹

Handbook of Laser Technology and Applications

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Seismic model and geological interpretation of the basement beneath the Doupovské Hory Volcanic Complex (NW Czech Republic)

Cited by 3 publications

References 21 publications

Slope Dependent Morphometric Analysis as a Tool Contributing to Reconstruction of Volcano Evolution

Slope Dependent Morphometric Analysis as a Tool Contributing to Reconstruction of Volcano Evolution

The newly discovered Neogene maar volcano near the Marianske Lazne, western Bohemia

Earth and environmental sciences

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