Clay minerals of sulfur deposits. Part one

In the sulfur deposits of the Pre-Carpathians, clay is marked throughout the entire productive section, ranging from gypsum to limestone deposits. In gypsum and anhydrite, the grain boundaries of these minerals often contain dark gray and dark green intricately curved interlayers of clayey material, squeezed, apparently, from the bulk of anhydrite during secondary processes. In the limestones, the clays form two sharply separated complexes, differing from each other in the form of occurrence, mineral composition and the time of their formation. The clays of the first complex are represented by thin (0.3–1.5 m) interlayers in the sulphurous and non-sulfurized limestone. They are dense, gray to bluish-gray and black. The dark coloring of clays is associated with the presence of pigmenting substances (organic and pyrite), syngenetic clay minerals. On weathered areas, variegated clay (gray with red spots) was found. In the inter-ossum layers, clays of homogeneous horizontally-layered texture with disturbed initial texture (crushed) predominate. The lamination in clays is explained by the presence of layers of sandy material and less often by admixture of plant residues. Clusters of native sulfur are often located along the lamination. These clays are characterized by oriented microtexture, due to the identical arrangement of small flakes of clay minerals. This oriented texture is characteristic of marine and freshwater sediments with quiet sedimentation of particles. The clays of the second complex perform the cavities of the karst craters in Rozdolsk and other fields. The basis of karst executions are dark gray and dark unclearly layered sandy clay, usually with a broken original texture. These are mainly compacted clays with numerous sliding mirrors along the planes of bedding and separation. They are characterized by a comminuted and lumpy separation with acute-angled pieces and fragments of a size of 1–5 cm.


When weathered, the clay easily breaks up into acute debris and forms noticeable debris. After the rains, weathered varieties swell up and turn into a gel-like mass. With the onset of dry weather, they quickly dry out, often on their surface numerous efflorescences of salts form a microscope; these clays are characterized by a monotonous grayish mass, which in crossed nicols reveals a random orientation of clay scales. The disordered clays may have initially had a normal-layered composition, but then in karst cavities they were subjected to stirring up, which disturbed the initial orientation of the clay particles. Among the dark clays in the bottoms of karst cavities are often found layers of dense gray clay, which in the air-dry state is difficult to cut with a knife. SlotV has been surfing through the galaxies of online amusements since 2017 in order to bring you unforgettable gambling experience and help you forget about everyday routine. SlotV Casino has a Curacao license and much more, including space design, cosmic bonuses, and extreme wins.