Wyniki wyszukiwania - BazTech

1

Landslide susceptibility mapping in the Beskid Niski Mts., Western Carpathians (Dukla commune, Poland)

Bronowski B., Chybiorz R., Jura D.

Geological Quarterly

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2016

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Vol. 60, No. 3

586--596

EN

Landslides are one of the most prominent processes degrading the Beskidy Mts. slopes. Susceptibility assessment is based on the detailed mapping of the Dukla commune (235 km2) at the scale 1: 10,000 in frames of the project Landslide Counteracting System. The terrain affected by landslides is 19.59 km2, which is 8.34% of the researched area. The largest number of landslides can be found in the Beskid Dukielski Mts. area, where nearly 78% of all landslide areas are concentrated. Analysis of landslide-causing factors was performed using the index of entropy method. The following five factors were considered: lithology, slope inclination, slope aspect, distance to faults, and distance to drainage. The most important role in the development of mass movements in the study area is played by slope inclination (0.0079) and lithology of siliciclastic flysch (0.0066). The method applied also contributed to devising a landslide susceptibility map of considerable accuracy at 90.5%. The analyses of the landslide factors have proven that understanding of geology and landforms is not only of cognitive significance, but adds to practical applications in spatial management. The studies confirmed usefulness of large-scale mapping of landslides and applying statistical methods and GIS techniques in the spatial analysis of landform transformations. The obtained landslide susceptibility map can be a basis for assessing landslide risk. High and very high landslide susceptibility classes cover nearly 50% of the study area.

2

Method of thermal derivative gradient analysis (TDGA)

Cholewa M., Suchoń J., Kondracki M., Jura D.

Archives of Foundry Engineering

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2009

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Vol. 9, iss. 4

241-245

EN

In this work a concept of thermal analysis was shown, using for crystallization kinetics description the temperature derivatives after time and direction. Method of thermal derivative gradient analysis (TDGA) is assigned for alloys and metals investigation as well as cast composites in range of solidification. The construction and operation characteristics were presented for the test stand including processing modules and probes together with thermocouples location. Authors presented examples of results interpretation for AlSi11 alloy castings with diversified wall thickness and at different pouring temperature.

3

Fold-and-thrust shortening in the western part of the Upper Silesian Coal Basin

Jura D., Kuzak R.

Polish Geological Institute Special Papers

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2002

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Vol. 7

133-142

EN

The western frame-margin of the Upper Silesian Coal Basin provides good case studies for structural evolution of the fold-and-thrust belt. This study is concerned with tectonic junctions taking place on the Late Variscan front of the Moravosilesian Fold Zone and coal basin. Clues of evolution of fold-and-thrust belt were reconstructed on the base of six cross-sections and using balancing procedure to calculate the shortening. These structural cross-sections illustrated the two principal positive and negative inversion processes of Upper Silesian Coal Basin. The fold shortening varies in range of 25 up to 30% and in low range of 4 up to 18%. The thrust shortening is contrary to fold shortening and changed range of about 10% up to 50%. In the central part of fold-and-thrust belt summarised shortening is 55%, which gradually decreases northward up to 35% and southward up to 30%.

4

Discordances of the top surface of carboniferous deposits of the Upper Silesian Coal Basin

Jura D.

Polish Geological Institute Special Papers

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2002

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Vol. 7

125-132

EN

Geological boundaries of the structural stages between Late Variscan Moravian-Silesian-Cracow orogene and Saalian Sławków Graben taphrogene, Early and Late Kimmerian epeirogene, Middle Alpine Silesian-Cracow Monocline, and Late Alpine Carpathian Foredeep are defined as discordances. These structural surfaces of different age, present in the top surface of Carboniferous deposits of the Upper Silesian Coal Basin, were investigated in morphotectonic research. Discordances in the morphotectonical record separate older faulted and folded Carboniferous deposits from younger, nearly subhorizontal rocks of epi-Variscan cover. This polychronic and polygenetic geological heterochronous boundary of the top surface of Carboniferous deposit consists of the following coeval discordances: sub-Permian, sub-Triassic, sub-Jurassic, sub-Cretaceous, sub-Miocene and sub-Quaternary. Those buried erosional surfaces with ancient landforms were some formed by terrestrial, others by marine planation. The repeated erosion of Carboniferous deposits and sedimentation of covers as well as fault, monocline and fold-flexure deformations are reflected in differentiated configuration of discordances in the height range from about 400 m a.s.l. to 6000 m b.s.l.

5

Young-Alpine Kłodnica fault scarps of the Metacarpathian high in the Silesian Upland

Jura D.

Technika Poszukiwań Geologicznych

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1999

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R. 38, nr 1

52-56

EN

The research results of paleogeomorphology, Alpine tectonics and analysis of mining seismicity suggest that in the Silesian Upland the relaxation of remnant stresses of the Metacarpathian High is active. Young faults are reflected in the morphology, producing escarpments, a pull-apart basins, half-grabens, pushup swells and half-horsts. The horsts are incised in tension zones and hills are in compression zones.

PL

Wyniki badań paleogeomorfologii, alpejskiej tektoniki i analiza wstrząsów górniczych wskazują, że na Wyżynie Śląskiej występuje relaksacja resztkowych naprężeń na wale metakarpackim. Młode uskoki są odzwierciedlone w rzeźbie jako: skarpy, półrowy typu pull-apart i półzręby typu wzniesień popychanych. Półzręby są rozcinane w strefach tensji a w strefach kompresji tworzą się garby.