Jerzy Żaba
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View article: Natural radioactivity in select metamorphic and sedimentary rocks of the Opava Mountains (Poland): A comparison between laboratory and in situ measurements of 232Th, 238U, and 40K activities
Natural radioactivity in select metamorphic and sedimentary rocks of the Opava Mountains (Poland): A comparison between laboratory and in situ measurements of 232Th, 238U, and 40K activities Open
rocks from the Opava Mountains region (Eastern Sudetes, Poland) as measured in the laboratory and under in situ field conditions. Activity concentrations for 232Th, 238U, and 40K were obtained using an HPGe gamma-ray spectrometry system. A…
View article: Clustering has a meaning: optimization of angular similarity to detect 3D geometric anomalies in geological terrains
Clustering has a meaning: optimization of angular similarity to detect 3D geometric anomalies in geological terrains Open
The geological potential of sparse subsurface data is not being fully exploited since the available workflows are not specifically designed to detect and interpret 3D geometric anomalies hidden in the data. We develop a new unsupervised ma…
View article: Clustering has a meaning: optimization of angular similarity to detect 3D geometric anomalies in geological terrains
Clustering has a meaning: optimization of angular similarity to detect 3D geometric anomalies in geological terrains Open
The geological potential of sparse subsurface data is not being fully exploited since the available workflows are not specifically designed to detect and interpret 3D geometric anomalies hidden in the data. We develop a new unsupervised ma…
View article: Data from: Thermal springs and active fault network of the central Colca River basin, Western Cordillera, Peru, published in Journal of Volcanology and Geothermal Research
Data from: Thermal springs and active fault network of the central Colca River basin, Western Cordillera, Peru, published in Journal of Volcanology and Geothermal Research Open
We used hydrogeochemical analysis of 35 water samples from springs and geysers, together with isotopic (δ18O and δD) analysis, chemical and mineral studies of precipitates collected in the field around these outflows, and field observation…
View article: Data from: Thermal springs and active fault network of the central Colca River basin, Western Cordillera, Peru, published in Journal of Volcanology and Geothermal Research
Data from: Thermal springs and active fault network of the central Colca River basin, Western Cordillera, Peru, published in Journal of Volcanology and Geothermal Research Open
We used hydrogeochemical analysis of 35 water samples from springs and geysers, together with isotopic (δ18O and δD) analysis, chemical and mineral studies of precipitates collected in the field around these outflows, and field observation…
View article: Thermal springs and active fault network of the central Colca River basin, Western Cordillera, Peru
Thermal springs and active fault network of the central Colca River basin, Western Cordillera, Peru Open
Thermal waters and vapor discharges (hot springs, geysers, solfataras, and fumaroles) are common phenomena in volcanic regions at active plate boundaries, and the Central Andes are no exception. The Colca River basin in S Peru is a highly …
View article: Tectonic control on slow-moving Andean landslides in the Colca Valley, Peru
Tectonic control on slow-moving Andean landslides in the Colca Valley, Peru Open
The Colca Valley in the Central Andes is a region characterized by the occurrence of large slow-moving landslides and a high level of seismic activity. In this study, we aimed to determine passive and active tectonic control on the formati…
View article: The shape of the Variscan Belt in Central Europe: Strike-slip tectonics versus oroclinal bending
The shape of the Variscan Belt in Central Europe: Strike-slip tectonics versus oroclinal bending Open
<p>The European Variscan belt sharply changes its trend in easternmost Germany and western Poland, where the ENE- to NE-striking structures are replaced by the ESE- to SE-trending ones. The structures of still another, NNE-SSW strike…
View article: Late Palaeozoic strike-slip tectonics versus oroclinal bending at the SW outskirts of Baltica: case of the Variscan belt’s eastern end in Poland
Late Palaeozoic strike-slip tectonics versus oroclinal bending at the SW outskirts of Baltica: case of the Variscan belt’s eastern end in Poland Open
Geophysical and geological data from the eastern sector of the Central European Variscan belt are presented and reviewed in the regional tectonic context. Matched filtering of isostatic gravity, guided by results of spectral analysis, alon…
View article: In situ gamma-ray measurements of 40K, 232Th and 238U in high-grade metamorphic rocks from the Sowie Mountains (Sudetes, SW Poland)
In situ gamma-ray measurements of 40K, 232Th and 238U in high-grade metamorphic rocks from the Sowie Mountains (Sudetes, SW Poland) Open
This paper reports on the abundance of primordial radionuclides ( 40 K, 232 Th and 238 U) in characteristic lithologies from the Sowie Mountains (SW Poland). In situ gamma-ray measurements were conducted at 12 localities hosting exposed au…
View article: Depositional architecture of marginal multiple-source ramp of the Magura Basin (Eocene Flysch formation, Outer Western Carpathians)
Depositional architecture of marginal multiple-source ramp of the Magura Basin (Eocene Flysch formation, Outer Western Carpathians) Open
The Zembrzyce Beds were studied to interpret the environments and facies in the western part of the Siary Subunit. New sedimentological data were obtained for the reconstruction of the depositional architecture of the Zembrzyce Beds. Based…
View article: 222Rn and 220Rn concentrations in soil gas of the Izera Massif (Sudetes, Poland) as a function of sampling depth
222Rn and 220Rn concentrations in soil gas of the Izera Massif (Sudetes, Poland) as a function of sampling depth Open
This research presents soil gas 222 Rn and 220 Rn concentrations measured at 17 locations in the Izera Massif of southwest Poland. The average 222 Rn concentrations at sampling depths of 10, 40 and 80 cm were 8, 78 and 224 kBq m –3 , re…
View article: Identification of iron-bearing minerals in basalts and pillow lavas of the Kaczawa Mountains using <sup>57</sup>Fe Mössbauer spectroscopy
Identification of iron-bearing minerals in basalts and pillow lavas of the Kaczawa Mountains using <sup>57</sup>Fe Mössbauer spectroscopy Open
The Kaczawa Mountains along with the Kaczawa foothill comprise a complicated geological unit that is called the Kaczawa metamorphic (Sudetes, SW Poland). The aim of our work was to identify the iron-bearing minerals in samples of basalts a…
View article: Epigenetic silicification of the Upper Oxfordian limestones in the Sokole Hills (Kraków-Częstochowa Upland): relationship to facies development and tectonics
Epigenetic silicification of the Upper Oxfordian limestones in the Sokole Hills (Kraków-Częstochowa Upland): relationship to facies development and tectonics Open
A spectacular epigenetic silicification was encountered in the Oxfordian bedded limestones exposed in the Sokole Hills situated in the Krakow-Częstochowa Upland. The main epigenetic mineral is microcrystalline quartz accompanied by minor g…
View article: Laboratory measurements of natural radioactivity in selected igneous rocks of the Opava Mountains region
Laboratory measurements of natural radioactivity in selected igneous rocks of the Opava Mountains region Open
The paper presents results of laboratory gamma–ray measurements of six igneous rocks from the Opava Mountains. The Opava Mountains are located in the Eastern Sudetes and represent their furthest eastern range. They run almost latitudinal…