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Magnetic fabric and mineralogy of cave deposits in Botovskaya Cave (Eastern Siberia, Russian Federation)
Kadlec, Jaroslav ; Hercman, H. ; Chadima, Martin ; Lisá, Lenka ; Oberhänsli, H. ; Osintsev, A.
The Botovskaya Cave is a typical example of a two-dimensional maze with a total length of explored passages exceeding 60 km, which represents the longest limestone cave system in the Russian Federation. The clastic cave sediments filling the cave passages differ in both mineral and mineral magnetic properties and were deposited under different hydrological conditions. The older portion of the clastic cave fills was derived from overlying sandstones, whereas the properties of younger cave sediments show closer affinity to the soils and weathering products originating on the sandstone plateau above the cave. The cave sediments underwent repeated periods of deposition and erosion during the Tertiary and Pleistocene.
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Obnova krajiny postižené dlouhodobou těžbou nerostů a intenzivním osidlováním: Nerostné suroviny
Janeček, O. ; Malý, T. ; Dvořák, Z. ; Rückl, Pavel
IV. část hodnotící zprávy tvoří tyto dílčí studie: IV.B.1 - Doprovodné suroviny severovýchodní části hnědouhelné pánve, IV.B.2 - Sběratelsky zajímavé lokality pánve a okolí (stav mineralogických nálezů SHP, významné paleontologické lokality SHP, mineralogické lokality Krušných hor, DNT, Údlice), IV.B.3 - Poddolovaná území - přehled, IV.B.4 - Sesuvy v pánvi - přehled.
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Mineral composition of agricultural soils developed on loess
Žigová, Anna ; Šťastný, Martin
The study is focused on the comparison of mineral composition of different soil types formed on loess. The soil types were classified according to the World reference base for soil resources. Samples were collected from individual soil horizons. Basic soil properties such as the particle-size distribution, pH values, CaCO3 contents, base saturation, cation exchange capacity, soil organic carbon and nitrogen were analysed using routine pedological methods. Mineral composition was evaluated on the basis of XRD analyses of the fraction < 0.001 mm. Semiquantitative mineral composition was calculated from the areas of basal peaks. The studied soils were found to be dominated by quartz, kaolinite and illite. Semiquantitative analyses of mineral composition of the Greyic Phaeozem, Haplic Chernozem and Haplic Luvisol revealed differences in the association and proportion of individual minerals.
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