Jerzy Żaba

Jerzy Żaba
University of Silesia in Katowice · Faculty of Natural Sciences

Prof.

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61
Publications
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473
Citations

Publications

Publications (61)
Article
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 diversified and complex thermal region with unresolved questions on the origin of thermal fluids, reservoir tem...
Chapter
A significant part of the detailed structural analysis can be done in the field. However, in many cases, especially in studies on ductile shear zones, further in-depth microstructural analysis is needed. For this purpose, correct collection of oriented rock samples with various tectonic structures is crucial for legitimate structural analysis. Samp...
Article
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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 formation of selected five large landslides in the Colca Valley and to assess geohazard associated with these features...
Article
Full-text available
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, along with other derivatives of gravity and magnetic fields reveal a dominant WNW-ESE-trending pre-Permian structur...
Article
We aimed to determine variations in stress regimes during the youngest Variscan deformations in the northern part of the Bohemian Massif. For this purpose, we calculated the orientation of the principal stress and strain axes for kink folds observed in the metamorphic envelope of the Karkonosze Granite, using two methods: 1) the traditional method,...
Conference Paper
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The presence of numerous alkali feldspars in Cretaceous carbonate-evaporitic Ashua Formation, southern Peru, was announced by Ciesielczuk et al. (2016). They occur most frequently in the Ashua limestones of Coniacian – early Santonian age, representing middle to inner carbonate ramp facies. Their frequency depends, however, on the distance from a d...
Article
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The natural radioactivities of five characteristic igneous rocks of the eastern foreland of the Opava Mountains (Eastern Sudetes, Poland), obtained in the laboratory and under in situ conditions, are presented. The activity concentrations of ²³²Th, ²³⁸U, and ⁴⁰K were measured using an HPGe gamma-ray spectrometry system. The ranges of the activity c...
Article
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We applied the detailed structural analysis to 394 outcrops in the southern and northern metamorphic cover of the Karkonosze Intrusion. We recognised five generations of fold structures: F1 – poorly preserved tight intrafoliation folds; F2 – themost common generation, with the whole variety of fold geometries,W–E andWSW–ENE-oriented fold axes in th...
Article
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This research presents soil gas ²²²Rn and ²²⁰Rn concentrations measured at 17 locations in the Izera Massif of southwest Poland. The average ²²²Rn concentrations at sampling depths of 10, 40 and 80 cm were 8, 78 and 224 kBq m⁻³, respectively. The average ²²⁰Rn concentrations for the same depths (10, 40 and 80 cm) were 6, 10 and 13 kBq m⁻³, respecti...
Article
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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 and pillow lavas from the Kaczawa metamorphic using
Article
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This study presents the preliminary results of 222Rn (radon) and 220Rn (thoron) concentrations that were measured in the soils developed on igneous rocks including mafic (pillow lavas, basalts and melaphyre) and acid (keratophyre, rhyolite and rhyolitic tuff) rocks at ten locations in the Kaczawa Mountains (SW Poland). The measurements were carried...
Book
Full-text available
The presented new geological map of the crystalline basement covers the north-eastern part of Poland, whose geological past is almost 2 billion years old. The mapped basement structurally belongs to the East European Craton formed by three initially independent crustal segments i.e. Fennoscandia to the northwest, Sarmatia to the south, and Volgo-Ur...
Conference Paper
Full-text available
Authigenic feldspars seem to be frequent in Ashua limestones of different stratigraphic position. In this preliminary study only the most euhedral grains (0.1-0.5 mm) from a site adjacent to a dacite stock were studied in detail. They are of albitic composition with few percent anorthite, randomly distributed within the coarse-grained limestone com...
Conference Paper
Full-text available
Authigenic feldspars seem to be frequent in Ashua limestones of different stratigraphic position. In this preliminary study only the most euhedral grains (0.1-0.5 mm) from a site adjacent to a dacite stock were studied in detail. They are of albitic composition with few percent anorthite, randomly distributed within the coarse-grained limestone com...
Conference Paper
Full-text available
An interesting mineral assemblage has been identified in the contact zone of a dacite stock intruding the Late Cretaceous red-bed Ashua Formation in the Huambo district, south Peru. It is tentatively ascribed to metasomatic, thermal alteration. The intricate geometry of the contact, and parageneses, reflects mylonitization which accompanied and pos...
Article
Full-text available
Mineral assemblage of paleosomes and neosomes of a dacite stock and hosting siliciclastic-carbonate-evaporitic red-bed formation are described. Estimated temperatures of metasomatic alterations range from 500 to 150 centigrades and pH is ca 8. The main cations involved are Na, K, Mg and Ca.
Conference Paper
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El Cañón del Colca y el Valle de los Volcanes poseen valores sobresalientes del entorno natural y algunos sitios arqueológicos. Ellos son estudiados por científicos polacos con el fin de proteger esta área mediante el establecimiento de un nuevo Parque Nacional. La delimitación de la zona y los principios de protección deben conciliar los aspectos...
Article
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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 goethite, hematite, barite, galena and sphalerite. Locally, the mineralized limestones reveal Pb and Cu contents...
Article
The Precambrain basement and Lower Paleozoic (Cambrian–Ordovicuna) sedimentary cover in the eastern part of the Upper Silesian Block (Brunovistulicum), known only in boreholes, is presented, and their palaeogeographic, fancies and palaeotectonic development is discussed. The former is characterized by a heterogenous structure that consists of Archi...
Article
Full-text available
In situ gamma-ray measurements of four igneous rocks were taken in the Opava Mountains (Eastern Sudetes, Poland). The activity of naturally occurring radionuclides was measured using a portable GX3020 gamma-ray spectrometry workstation. The activity concentrations of 40K varied from 914 ± 17 Bqkg-1 (gneiss, Kamienna Góra) to 2019 ± 37 Bqkg-1 (weath...
Conference Paper
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Tectonic background to the thermal activity manifestations and mass movements (volcanic debris avalanche, landslides) is presented
Article
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The network of faults and joints within the Mesozoic, Miocene and Pleistocene-Holocene formations was studied in the Rio Colca valley in the Pinchollo–Lari–Maca area (Central Andes, Southern Peru). A complex, multi-phase development of these structures was revealed. The results show that the structural framework of the Rio Colca valley consists of...
Article
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W artykule przedstawiono proces opracowania cyfrowego, trójwymiarowego modelu złoża węgla kamiennego wraz z nadkładem, na przykładzie KWK "Knurów-Szczygłowice", położonej w zachodniej części Górnośląskiego Zagłębia Węglowego. Model przygotowano jako podstawę do numerycznego przewidywania deformacji terenu pod wpływem postępującej podziemnej eksploa...
Article
Full-text available
The activity concentrations of 40K, 232Th, and 238U in the characteristic rocks of the Modane-Aussois region (Western Alps, France) were determined using an HPGe gamma-ray spectrometry system. The activity concentrations of 40K varied from 18Bqkg−1 (limestone dolomite) to 392Bqkg−1 (calcschist), while those of 232Th varied from 0.7Bqkg−1 (limestone...
Conference Paper
Full-text available
The network of faults and joints within the Mesozoic, Miocene and Pleistocene–Holocene formations was studied in the Rio Colca valley, in the Pinchollo–Lari–Maca area. A complex, multi-phase develop-ment of these structures was revealed. The structural framework of the Rio Colca valley consists of WNW–ESE and NE–SW faults, and a few W–E faults. The...
Article
Full-text available
The caldera of an extinct Ngorongoro volcano is the largest unflooded and not destroyed type of this form on Earth. The depression itself occupies an area of nearly 300 km 2 , while the Crater walls tower a few hundred metres (400–610 m) above the floor of the caldera. Almost all typical for East Africa plants and animals, as well as rare, endemic...
Article
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In the Kraków–Lubliniec Fault Zone (KLFZ) late Carbonifereous–Permian volcanic rocks mark the boundary between the Małopolska Block (thinned marginal sector of Baltica) and the Upper Silesian Block (a sector of the Brunovistulia composite Terrane). The Zone is a part of the major Hamburg–Kraków–Dobrogea transcontinental strike–slip tectonic zone se...
Article
New geological, geochemical and U-Pb SHRIMP zircon age data brought more information about basement units in subsurface of Southern Poland and SE Romania, which allows to revise and refine some earlier models in the framework of the break-up of the Rodinia/Pannotia supercontinent. In the Brno Block, Moravia, and in the Upper Silesia Block, three di...
Article
Full-text available
Fault/fracture network within Mesozoic and Quaternary formations has been studied in Rio Colca Valley in Pinchollo – Lari – Maca area (Peruvian Andes). The results show structural framework of the Rio Colca Valley based on nearly all tectonic discontinuities observed in the area; mostly on WNW-ESE and NE-SW faults, and on few WE faults. Displacemen...
Article
The attempt to divide the Upper Silesian Block and the Małopolska Block into tectonic units has been based on a general map at scale of 1:1000000, without Permian-Mesozoic and Cenozoic strata. Cartographic, general and monographic works regarding formation of Precambrian basement of both of the blocks have been discussed and presented, and data con...
Article
Full-text available
The results of tectonic studies in the Rio Colca Valley, Peru, are presented in the paper. Field data were gathered in 2006 during a scientific expedition working on intensive and catastrophic geo-hazards of the area in relation to tectonic settings of the valley. Influence of recent seismic activity, volcanic eruptions and tectonic faulting on the...
Article
Two large, regional tectonic units, represented by Malopolska and Brunovistulicum blocks (terrains) can be distinguished in the southern Poland. The Cracow-Lubliniec fault zone forms their border. They vary both in the structures of the Precambrian basement and the Paleozoic rock cover, which shows different paleogeographic-facies and paleotectonic...
Article
Full-text available
The Kraków-Wieluń Upland in southern Poland bears numerous complexes of carbonate buildups which developed in Late Jurassic times upon the stable, northern shelf of the Tethys Ocean. Intensive growth of these structures was strongly controlled by structural properties of their bedrock. The Proterozoic and Palaeozoic bedrock of the Kraków-Wieluń Upl...
Article
The Upper Silesian and Małopolska blocks are situated near the southwestern boundary of the East European Platform within the Trans-European Suture Zone. The Lower Palaeozoic lithologies of the blocks reveal different stratigraphic and diastrophic development. In the Upper Silesian Block, unmetamorphosed and gently folded Lower Cambrian to Ordovici...

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Projects (4)
Archived project
Producing a reference book on Geotourism (2021) Sadry, B.N. (Ed.) (2021) The Geotourism Industry in the 21st Century: the Origin, Principles, and Futuristic Approach; APPLE Academic Press:Palm Bay, Florida, USA.
Project
Polish Scientific Expedition to Peru (PSEP) conducts interdisciplinary research in Colca Canyon and Valley of the Volcanoes in Peru. The AGH Student Paddler Expedition Canoandes who pioneered in flowing down Rio Colca Canyon, proclaiming worldwide that it is the deepest canyon of our planet and I effect made popular target of visits of many tourists. The Tourist is the one of most important sector of the Peruvian economy. The PSEP’s work is aimed at laying foundations for project of Canyon Colca and Valey of the Volcanoes National Park.