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1
Content available Biostratigraphy, geochemistry and sedimentology of Middle to Late Jurassic strata in the Strážovce section (Strážovské vrchy Mts), Krížna Nappe of the Central Carpathians, Slovakia
Michalík J., Bąk M., Lintnerová O., Méres Š
Volumina Jurassica
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2017
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Vol. 15, no 1
161--178
EN
The Jurassic / Lower Cretaceous sequence of the Strážovce section has been deposited in the central, axial part of the Zliechov Basin. Its most characteristic part – the Ždiar Formation consists of bedded siliceous radiolarian limestones and radiolarites. The radiolar¬ian assemblage typical of the North Tethyan Bioprovince lived during mid Oxfordian – Early Kimmeridgian in a warm upper part of the well stratified water column, partially near to the thermocline. Radiolarian abundance decreases upwards. Productivity decrease is quanti¬fied by the share of biogenic SiO2 as well as by high EFSi values during sedimentation of both the Ždiar and Jasenina formations. The geochemical data indicate relatively stable volume of the siliciclastic component of the rocks and a felsic character comparable to the Average Shale. The chemically homogeneous sedimentary signal indicates values of both CPA and EF ≤ 1 of Ti, Zr, Fe, Na, K, Rb, V and U. The values of EF > 1 signal enrichment of elements with affinity to carbonate minerals (Sr, Mn, P, Y, and Mg). Metal enrichment (Cu, Zn and Ni) indicates metal mobilization from other sources or due to carbonate diagenesis. In comparison to the Average Shale, decreased ΣREE´s and negative Cech and Euch anomalies could be regarded as a typical deep sea water signal. The differentiated REE record of higher calcareous beds of the Jasenina Fm. suggests basinal dysoxic conditions. The “bell-shape” of curves (normalized to shale) indicate that REEs were slightly affected by carbonate diagenesis. The Oxfordian / Kimmeridgian siliceous sedimentation in the Zliechov Basin was influenced probably more by monsoon-controlled input of land derived weathered material than by hydrothermal fluids from the bottom rifts.
2
Content available Identification of failure transformers 22/0,4 KV and 110/23 KV using SFRA method
Brandt M., Michalík J.
TTS Technika Transportu Szynowego
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2013
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R. 20, nr 10
3505--3512
EN
The article deals with the identification type of faults in power transformer using the method SFRA. The results taken from this transformer are compared with the results taken from experimental distribution transformer.
3
Content available remote Palynomorph assemblages of Triassic/Jurassic boundary key sections of the NW Tethyan realm: evidence for climatic change
Ruckwied K., Götz A., Pálfy J., Michalík J.
Volumina Jurassica
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2006
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Vol. 4, no. 1
297-297
EN
The composition and diversity of Late Rhaetian/Hettangian microfloras of the NW Tethyan realm are investigated with respect to the Triassic/Jurassic mass extinction and the processes that may have caused this crisis. Key locations for detailed palynological studies are selected in the Tatra Mountains (Slovakia) and the Mecsek Mountains (Hungary). The Furkaska section (Tatra Mts., Slovakia) exposes a complete succession of a proximal marine setting. The Upper Triassic Fatra Formation is characterized by bioclastic limestones and fine-grained clastics overlain by dark claystones with intercalated sandstones of the lowermost Jurassic Kopieniec Formation. Based on geochemical data and microfacies analyses, the boundary interval is placed near the transition of the two formations. In the area of Pécs and Komló (Mecsek Mts., Hungary) outcrops and core material reveal a fluvial-lacustrine succession continued by paralic coal deposits. The Upper Triassic Karolinavölgy Sandstone Formation is built up by arcosic sandstones and siltstones overlain by the coal-bearing uppermost Triassic to Lower Liassic Mecsek Coal Formation. The palynomorph assemblages of both settings display typical Rhaetian/Liassic microfloras, dominated by bisaccate pollen grains, trilete spores and Circumpolles. Striking quantitative changes in the composition of the palynomorph assemblages are interpreted with respect to climatic changes within this period. Palynology has been proven as a powerful tool for terrestrial to marine correlation. The floral turnover on land can be directly read from changes in the palynomorph assemblages in the investigated marine and terrestrial sections.
4
Content available remote Palynology, T/J boundary microfacies, clay mineralogy, C and O isotopes and other palaeoclimatic indicators from the Tatra Mts.
Götz A., Ruckwied K., Biroń A., Lintnerová O., Michalík J.
Volumina Jurassica
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2006
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Vol. 4, no. 1
282-283
EN
The Furkaska and Kardolina sections expose a complete succesion of the uppermost Fatra Formation and the lowermost Kopienec Formation. The Upper Triassic Fatra Fm. is characterized by bioclastic limestones and fine-grained clastics overlain by dark claystones with intercalated sandstones (Cardinia Sandstein) of the Kopienec Formation. Due to lack of age-diagnostic index fossils, the precise position of the Triassic/Jurassic boundary is not yet known. Based on negative excursion of the δ ¹ ³C carbonate isotopic curve and microfacies analyses the boundary interval was placed near the transition of two formations. Palynological analysis was focused on palaeoenvironmental and stratigraphical aspects. Generally, the continental fraction shows a high amount of phytoclasts. The few marine organic depositional environment indicate a very shallow marine depositional environment. The palynomorph assemblage of the Fatra Fm. is characterized by numerous Ricciisporites tuberculatus. The marine fraction of this part of the sections is dominated by dinoflagellate cyst Rhaetogonyaulax rhaetica. Microflora of the Upper Fatra Formation is very similar to the Ricciisporites tuberculatus Zone of the Polish zonation and Ricciisporites-Polzdiisporites Zone of the SE Nord Sea Basin, both indicating a Middle to Late Rhaetian age. The palynomorph assemblage of the Kopienec Formation is characterized by a significant increase of trilete laevigate spores, mainly Deltoidospora spp. and Concavisporites spp. The dinoflagellate cyst Dapcodinium priscum replaces Rhaetogonyaulax rhaetica in the marine fraction. These changes may be caused by a regression at the Triassic/Jurassic boundary. Quantitative clay minerals analyses documented palaeoclimatic, palaeogeographic and postsedimentary changes in the boundary event and integrated palynological results. Mixed layer illite/smectite (I/S) smectite interlayers take about 80% of the clay fraction and their low content of smectite (10-20%) indicate relatively high diagenetic overprint of the Fatra and Kopienec formations claystones corresponding with burial temperature of 150oC. Varied contents of detrital illite, chlorite and kaolinite were used to demonstrate climatic changes in the hinterland and indicated depositional condition in this semi-restricted basin. Kaolinite and low illite/kaolinite ration indicate more humid climate during earliest Jurassic in comparison with the Rhaetian condition of illite/chlorite dominance. Peak occurrence of kaolinite at the base of the Kopienec Formation recorded different source and strong input of material from weathered and eroded land into proximal part of deltaic plain in comparison with the Fatra Formation.
5
Content available remote Faunal and floral distribution, biostratigraphy, cyclostratigraphy and magnetostratigraphy of the T/J boundary
Michalík J., Soták J., Ruckwied K., Götz A., Grabowski J.
Volumina Jurassica
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2006
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Vol. 4, no. 1
292-292
EN
The Rhaetian and Hettangian sequence in the Zliechov Basin, Western Carpathians, comprises records of several environmental crises which could contributed to the global Triassic/Jurassic Boundary Events. The Upper Triassic Fatra Formation is characterized by bioclastic limestones and fine-grained clastics overlain by dark claystones with intercalated sandstones (Cardinia Sandstein) of the Kopieniec Formation. The diversity of benthic fauna decreased at the base of the "Transition Beds" - the uppermost member of the Fatra Formation. The fauna comprises important index forms of bivalve molluscs (Chlamys valoniensis), corals, brachiopods (Austrirhynchia cornigera) and foraminifers (Triasina hantkeni, etc.). The palynofacies of the entire succession is dominated by terrestrial components and by high amount of phytoclasts. The few marine organic particles indicate a very shallow marine depositional environment. The palynomorph assemblage of the Fatra Formation is characterized by numerous specimens of Ricciisporites tuberculatus. The marine fraction of the lower part of the section is dominated by the dinoflagellate cyst Rhaetogonyaulax rhaetica. The palynomorph assemblage of the Kopieniec Formation is characterized by a significant increase of trilete laevigate spores, mainly Deltoispora spp. and Concavisporites spp. The dinoflagellate cyst Dapcodinium priscum replaces Rhaetogonyaulax rhaetica in the marine fraction. These changes may be caused by a regression at the Triassic/Jurassic boundary and by an important fresh water input. The boundary between the Fatra and the Kopieniec formations is sharp, denoted by sudden termination of carbonate sedimentation followed by non-carbonate Boundary Clay of the Kopieniec Formation. Magnetostratigraphic record is in procession, it is hampered by complicated pattern of geomagnetic reversals at the end of the Triassic and at the beginning of the Jurassic period.
6
Content available remote Hybride Untertagebergbaulokomotive und ihr Einfluss an die Arbeitsumgebung.
Michalík J., Kučera S., Broška J.
Zeszyty Naukowe. Transport / Politechnika Śląska
|
1998
|
z. 31
215-221
PL
Jednym ze szkodliwych czynników w górnictwie podziemnym są spaliny pochodzące z silników spalinowych. Wartykule przedstawiono możliwość ograniczenia emisji spalin poprzez przebudowę lokomotywy spalinowej LZH-50 na lokomotywę spalinowo-akumulatorową LZDEA.
EN
One from harmful factors in underground mining are exhaust gases from internal combustion engines. In this paper one possibility of reduction of exhaust gases emission by reconstruction of diesel locomotive LZH-50 has been presented. After reconstruction this locomotive is a diesel-storage-battery locomotive LZDEA.
7
Content available remote Hybride Untertagebergbaulokomotive und ihr Einfluss an die Arbeitsumgebung
Michalík J., Kučera S., Boroška J.
Zeszyty Naukowe. Transport / Politechnika Śląska
|
1998
|
z. 34
193-199
PL
Jednym ze szkodliwych czynników w górnictwie podziemnym są spaliny pochodzące z silników spalinowych. W artykule przedstawiono możliwość ograniczenia emisji spalin poprzez przebudowę lokomotywy spalinowej LZH-50 na lokomotywę spalinowo-akumulatorową LZDEA.
EN
One from harmful factors in underground mining are exhaust gases from internal combustion engines. In this paper one possibility of reduction of exhaust gases emission by reconstruction of diesel locomotive LZH-50 has been presented. After reconstruction this locomotive is a diesel-storage-battery locomotive LZDEA.Ä?&‰]&‰
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