Výsledky vyhľadávania
Názov Chromian spinels from the Magura Unit (Western Carpathians, Eastern Slovakia) - their petrogenetic and palaeogeographic implications Aut.údaje Katarína Bónová ... [et al.] Autor Bónová Katarína (60%)
Spoluautori Spišiak Ján 1953- (16%) UMBFP01 - Katedra geografie a geológie
Bóna Ján (12%)
Kováčik Martin (12%)
Zdroj.dok. Geological Quarterly. Vol. 61, no. 1 (2017), pp. 3-17. - Warszaw : Polish Geological Institute - National Research Institute, 2017 Kľúč.slová provenance detrital chromian spinel geochémia - geochemistry Heslá geogr. Západné Karpaty (pohorie) Magura Basin Jazyk dok. angličtina Krajina Poľsko Systematika 550.4 Anotácia Detrital chromian spinels in sedimentary rocks provide much information concerning the tectonics of their parental ultrabasic rocks. Chromian spinels occurring in the Eocene to Oligocene deposits from the Magura Nappe were examined to provide some constraints on the history of the Magura Basin. The Magura Nappe is a part of the Flysch Belt belonging to the External Western Carpathians. The Magura Nappe is separated by a narrow zone associated with the Pieniny Klippen Belt and is divided into three principal tectono-lithofacies units (from the S to N): the Krynica, Bystrica and Rata units. Cr-spinel is a common accessory mineral (2.3-5.9 vol% of heavy mineral spectra) in the siliciclastic rocks of the Raca and Krynica units. In terms of texture and chemical composition, two types of Cr-spinels were recognized: unaltered and altered. Unaltered spinels were found to contain silicate inclusions such as chromio-pargasite, enstatite, diopside, pargasite, plagioclase and olivine (forsterite). The chromian spinels show wide variations in compositional parameters such as Cr# (0.3-0.7), Mg# (0.3-0.7), TiO2 (<0.03-1.9 wt.%) and Fe2+/Fe3+ (2.5-13) whereas the differences between the Raca and Krynica units are insignificant. These parameters suggest a peridotitic and volcanic origin of the spinels, respectively. The ophiolite source consisting of harzburgitic mantle peridotites was developed mainly in a supra-subduction zone setting; volcanic spinels indicate an origin in mid-ocean ridge basalts, back-arc basin basalts and sporadically in ocean-island basalts. Concerning their geo-chemical features, we propose that during the Eocene to Early Oligocene, the ophiolitic detritus in the eastern part of the Magura Basin deposits may have been derived from a source area located in the Fore-Marmarosh Suture Zone (Eastern Carpathians) that is considered an equivalent of the Black Flysch and Ceahlau units. Some Cr-spinels found in the Eocene sedimentary successions may have resedimented from older Late Cretaceous-Paleocene formations of the Magura Unit, which are considered as reworked sedimentary material from the Pieniny Klippen Belt. URL Link na plný text Kategória publikačnej činnosti ADC Číslo archívnej kópie 41743 Kategória ohlasu MADZIN, Jozef - PLAŠIENKA, Dušan - MÉRES, Štefan. Provenance of synorogenic deposits of the Upper Cretaceous-Lower Palaeogene Jarmuta-Proc Formation (Pieniny Klippen Belt, Western Carpathians). In Geologica Carpathica. ISSN 1335-0552, 2019, vol. 70, no. 1, pp. 15-34.
Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika 
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Názov Morphometric and geological conditions for sediment accumulation in the Udava River, Outer Carpathians, Slovakia Aut.údaje Dušan Barabas, Ján Bóna ... [et al.] Autor Barabas Dušan (52%)
Spoluautori Bóna Ján (23%)
Klein Daniel (11%)
Balážovičová Lenka 1982- (14%) UMBFP01 - Katedra geografie a geológie
Zdroj.dok. Journal of Geographical Sciences. Vol. 27, no. 8 (2017), pp. 981-998. - Peking : Science China Press, 2017 Kľúč.slová river channel channel bar accumulation Heslá geogr. Karpaty (pohorie) Jazyk dok. angličtina Krajina Nemecko Systematika 55 Anotácia The accumulation of sediment in river channels is a phenomenon that is not only influenced by the channel morphology, but also by the physical and geographical characteristics and the endogenous and exogenous processes taking place in the catchment. This paper presents an analysis of the impact the changes in lithological conditions have on the morphological and morphometric parameters of the Udava River channel and their relation to the channel accumulation forms representative of the river’s longitudinal profile as well as of its planform. Results document when accumulation forms occur and what is their spatial distribution within the longitudinal and cross-sectional river profiles. More resistant structures created sections with a lower degree of sedimentation, while in depression segments the degree of sedimentation was higher. With the increase in longitudinal slope, the impact of channel width on the average channel bar size increased. Also a difference in the accumulation was observed between the left and right bank which could be possibly explained by the impact of Coriolis force URL Link na plný text Kategória publikačnej činnosti ADM Číslo archívnej kópie 42115 Kategória ohlasu RUSNÁK, Miloš - SLÁDEK, Ján - KIDOVÁ, Anna. Using UAV technology for landscape classification and mapping in fluvial geomorphology. In Geografický časopis. ISSN 0016-7193, 2018, vol. 70, no. 2, pp. 141-160.
KURNIANTO, F. A. - NURDIN, E. A. - YUSHARDI. Analysis of stratigraphy and lithology in forming gold minerals in East Java with digital elevation model and medium format photo. In 2nd international conference on environmental geography and geography education, ICEGE 2019, East Java, Indonesia, 28th-29th September 2019. Bristol : Institute of physics publishing, 2020. ISSN 1755-1307, vol. 485, no. 1.
GU, Zhenkui - SHI, Changxing - PENG, Jie. Evolutionary dynamics of the main-stem longitudinal profiles of Ten Kongdui basins within Inner Mongolia, China. In Journal of geographical sciences. ISSN 1009-637X, 2019, vol. 29, no. 3, pp. 417-431.
DAS, Sumit. Geomorphic characteristics of a bedrock river inferred from drainage quantification, longitudinal profile, knickzone identification and concavity analysis : a DEM-based study. In Arabian journal of geosciences. ISSN 1866-7511, 2018, vol. 11, no. 21.
BARABAS, Dusan - BONA, Jan - KLEIN, Daniel - BALAOVICOVA, Lenka. Morphometric and geological conditions for sediment accumulation in the Udava River, Outer Carpathians, Slovakia. In Journal of geographical sciences. ISSN 1009-637X, 2017, vol. 27, no. 8, pp. 981-998.
Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika nerozpoznaný