Geologia
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ISSN 0138-0974
e-ISSN: 2353-0782
Issue Date
2008
Volume
T. 34
Number
Nr 1
Description
Journal Volume
Geologia
T. 34 (2008)
Projects
Pages
Articles
Zmieniony anhydryt z Kopalni Soli Bochnia
(Wydawnictwa AGH, 2008) Pitera, Helena; Cyran, Katarzyna
Salt deposit is located in the northern limb of Bochnia antycline. We can distinguish the following sediments in lithostratigraphic profile: basal anhydrite, lower zuber, southern salts, shaley marly claystone, anhydritic claystone, upper zuber, anhydritic shale with beds of crystal salt, middle salts, anhydritic claystone, northern salts, shaley marly claystone, top anhydrite. Samples were taken from baren intercalations of enterolithic anhydrites within humid grey claystones. They were studied under polarizing light and electron microscope. Semi-quantitative chemical analysis and analysis for trace elements were also made. All research revealed that anhydrite had been partly altered in gipsum. This process occurs under the influence of mine's air humidity or water which migrates from the surface or surrounding beds. Moreover anhydrite is impured by clayey minerals.
Żelazowo-żelazawe odmiany sepiolitu i saponitu z diabazów z Niedźwiedziej Góry koło Krakowa
(Wydawnictwa AGH, 2008) Gaweł, Adam; Muszyński, Marek; Pieczka, Adam; Skowroński, Andrzej; Stoch, Paweł
In fracture veins found in the so-called diabases of Niedźwiedzia Góra near Cracow the authors have identified ferriferrous varieties of sepiolite: $Ca_{0.09}(Mg_{2.35}Fe^{3+} _{0.82}Fe^{2+} _{0.33}Mn_{0.05})_{\Sigma 3.55}[(Si_{5.92}Al_{0.07}Fe^{3+} _{0.02})O_{15}](OH)_{2} \cdot 6H_{2}O$ and saponite: $(Ca_{0.018}K_{<0.01})(Mg_{1.55}Fe^{3+} _{0.61}Fe^{2+} _{0.38}Al_{0.16}Ti_{0.01})_{\Sigma 2.71}[(Si_{3.46}Al_{0.37}Fe^{3+} _{0.17})O_{10}] (OH)_{2} \cdot 4H_{2}0$, two minerals rarely occurring in the nature. They are accompanied mainly by quartz (sometimes with chalcedony) and calcite, whereas less frequently by pyrite, marcasite, sphalerite, barite, fluorapatite and Ti-Fe oxides (ilmenite?). The veins represent a distinct system that must be interpreted as a result of epithermal postmagmatic activity. The sepiolite rich in iron, the minerals of the $SiO_2$ group, calcite, barite and Fe and Zn sulphides crystallized directly from solutions in rock fractures. The iron-rich saponite is, in turn, a product of alteration of the diabase rubble present initially in the fractures (apatite and Ti-Fe oxides are its relicts), affected by these solutions. The saponite must have originated as a ferrous variety in a reducing environment. Its current, ferriferrous character is an effect of later changes imparted by descending, oxygen-rich waters, percolating through the fractures after the erosion removed overlaying Carboniferous rocks and an upper part of the diabase sill.
Zastosowanie metody magnetotellurycznych profilowań ciągłych w badaniach strukturalnych
(Wydawnictwa AGH, 2008) Stefaniuk, Michał; Czerwiński, Tomasz; Klityński, Wojciech; Wojdyła, Marek
The paper presents case studies of the continuous magnetotelluric profiling applied to structural studies under varied geological conditions. Two applications refer to identifying of allochthonous flysch structure and its basement in the Polish Outer Carpathians. The case studies from the Sudetes Mts. present the application of the continuous magnetotelluric profiling to identify tectonic zones in crystalline rock complexes and accompanying filtration zones of mineral and thermal waters. A case of a salt dome that was identified by means of the MT investigations in the central part of the Mid-Polish Ridge is also presented. At the platform-type zone of the East Pomerania, the MT investigations were carried out to recognize geological complexes resting beneath the evaporate Zechstein horizon that screened the elastic energy. The methodology of the MT investigations and results of geophysical interpretation and some aspects of geological interpretation of MT data are presented.
Osiadanie gruntów zwałowanych w poeksploatacyjnym wyrobisku odkrywkowym w wyniku odbudowy zwierciadła wody gruntowej
(Wydawnictwa AGH, 2008) Woźniak, Henryk; Borecka, Aleksandra ; Kaczmarczyk, Robert
Common remediation method of inactive open pits is a partial or complete infilling with dump soil derived from removed overburden. A problems which rises during such remediation is a significant settlement of soils caused by its high compressibility. Recognition of compressibility and settlement enables the proper design of both required and final depths of the fill and allows to balance the required and existing volumes of dumped material. Authors proposed a calculation method for settlement of dumped fill deposited in an inactive open pit, which includes self-weight settlement and collapse settlement caused by recovery of groundwater table. The proposed calculation is based upon solution given by Nwabuokei & Lovell (1985) for settlement of fills composed of compacted soil. Examples of calculations are presented in which both the compressibility and collapse potential parameters were determined from authors' own studies.
Metale w osadach dennych jeziora Wigry
(Wydawnictwa AGH, 2008) Prosowicz, Dorota
Concentrations of metals (Cd, Cr, Cu, Fe, Mg, Mn, Zn) were analyzed in main types of the bottom sediments of Wigry Lake. The concentrations of metals depend strongly on the lithological type of the sediment (carbonate gyttja, lacustrine chalk, detritous gyttja, clastic sediments). Results of the study were compared to geochemical backround and bottom sediments of different lakes. The highest concentrations of metals were found in detritous gyttja from Hańczańska Bay - the most polluted part of investigated area. Correlations between metals were presented. Most of presented metals in recent sediments of Wigry Lake occur bellow maximum allowable levels determined for unpolluted sediments. Concentrations of many elements in the recent sediments of Wigry Lake are much lower compared to those in many lakes in Poland and in the world.