Agate samples collected from the vicinity of Asni and Agouim (Western Atlas, Morocco) were investigated using microscopic observations supported by Raman micro-spectroscopy. The agates are marked presence various microtextures typical epithermal vein deposits, including jigsaw-puzzle, feathery, lattice-bladed. first two indicate that formation was likely recrystallization metastable silica phases (i.e., opaline or massive chalcedony). lattice-bladed (after barite calcite) quartz may be, in...

Outcrops of natural blue and purple halite crystals have been found in Kłodawa (Poland) salt deposit originating from the Permian (Zechstein) formation within tectonic zones. Field works carried out on various levels Salt Mine indicated differences both intensity hue size outcrops. Their occurrence was connected with presence epigenetic sediments rich potassium. For samples halite, an optical anisotropy (birefringence) observed for standard mineralogical thin sections thick plates,...

Diatomites belonging to a list of raw materials used in the EU criticality assessment are essential many industrial applications due unique combination their physical properties, i.e. porous and permeable structure, high specific surface area adsorption capacity, low density thermal conductivity, chemical inertness.The present study was undertaken analyse relationships between pore network characteristics, petrophysical parameters, mineralogical variability Lower Miocene diatomites from...

The Lotsberg Salt Formation (LSF) of the Lower Devonian age occupies a large area in Alberta (Canada). It has been used for brine production, disposal, and storage purposes since 1950s. Its petrological geochemical features remain poorly understood up to now. Previous studies showed that these salt rocks are crystalline distinguishable by very low bromine content (2–5 ppm). Our reveal main impurity is dolomite with an addition haematite. showed, also, lack sulphate minerals (anhydrite)....

Analysis of archive and published geological, geochemical petrological data on composition potash-bearing units (Older Potash [K2] Younger [K3]) the Polish Zechstein (Late Permian) sections (mainly sampled pro les form three salt diapirs located in central Poland: Góra, K odawa, Mogilno, additionally for petrology from Inowroc aw diapir as well some stratiform potash occurrences Foresudetic area SW Poland) enabled to de ne content intervals statistic main chemical components both a type...

The diapiric structures of the Polish Lowlands are tectonically deeply seated down to autochthonous Zechstein strata at a depth ca. 6 km. In process deep burial and halokinetic diapirism, salt rocks were subjected diagenetic metamorphic transformations, with temperature being an essential factor. Considering thermal gradient, up 200°C can be achieved in dome within range from several hundred metres km, which may lead transformations majority minerals. Phase transitions two borate minerals –...

The Oldest Halite (Na1) (Zechstein, Upper Permian) played a significant role in the development of geological structure Fore-Sudetic Monocline (SW Poland) because its different rheological properties comparison to adjacent rocks. Intercalations anhydrite and anhydrite-halite occurring within Na1 show lot features tectonically disturbed Macroscopic petrological observations revealed that rocks represent four rock types with structural textural properties. On microscopic scale, five crystals...

The occurrence of both the blue and violet halites is one most interesting phenomena in nature. Despite numerous laboratory field works, their origin natural evaporitic environments has not been satisfactorily explained. In Kłodawa Salt Dome (Zechstein, Central Poland), or occur relatively frequently. Their accumulations differ size intensity colours. this paper, petrological features anhydrite crystals derived from largest outcrops halite at Mine are presented. Anhydrite solid inclusions...

Raman microspectroscopy of organic matter, vitrinite reflectance and fluid inclusion data were used to reconstruct the thermal history in lower Carboniferous accretionary prism Culm Basin Nízký Jeseník Mts. (NE Bohemian Massif). The model involves Variscan (mid–late Carboniferous) burial diagenesis, which was overprinted by a post-Variscan, probably Permian and/or early Mesozoic, pulse(s) its central western parts. latter may have been related advective heat transport circulation hot fluids....

Occurrences of borate minerals in the Zechstein salt-bearing deposits Kłodawa salt dome (central Poland), and manner their development, suggest that were formed at high temperatures, considerably exceed temperature estimated from thermal gradient (~180°C). Research on rock potassium-magnesium salts containing congolite boracite, respectively, are consistent with high-temperature processes transformations affecting rocks certain sections dome. The chemical composition of, daughter occurring...

The paper presents the attempt to find a correlation between content of impurities and mechanical parameters rock salt from LGOM. Research was carried out in three steps: uniaxial compressive strength tests, determination insoluble minerals (impurities), observations under microscope Raman microspectroscopy. research results reveal that which is characterized by low (0.13–2.11% wt.) shows no properties impurities. However, it found depend on both distribution halite crystals presence fluid...

Raman spectroscopy and vitrinite reflectance measurements of dispersed organic matter from Carboniferous shales in boreholes the northern part Intra-Sudetic Basin were used for thermal history reconstruction. Microscopic investigations have shown that is dominated by maceral group. In analysed samples, shows a varied degree alteration determined mean random (VRo) ranging 0.72% to 3.80%. Mean apparent maximum (R’max) values reached 4.98%. The full width at half D1 G bands spectra are...

A b s t r a c t. Based on the hitherto existing problems understanding and interpretation of fluid inclusion microthermometric results relatively uncomplicated access to Raman microspectrometry, both methods have been explained applied several samples from Carpathians one sample borehole in central Poland (Katarzynin 2).The types analytical are different temperature values T h -homogenization temperature, e -eutectic m -ice melting coalification organic matter (MO).They interpreted together,...