This article presents karstological prospecting of selected areas in Ras Al-Khaimah Emirate, UAE. Several locations in Musandam Mountains have been explored for caves, karst springs and surface karst ...features. Two karst springs, Khatt and MeBreda, were analyzed for basic physical, chemical and microbiological parameters. Although they are both recharged from karst aquifers, they differ significantly. The first one is a thermal spring in which infiltrated rain water is mixed with more saline and mineralized water from greater depths. The location of the second one at the high altitude of 710 m a. s. l. is conditioned by the existence of a less permeable zone within a carbonate aquifer with a larger share of dolomite. There were increased concentrations of nitrates probably due to grazing goats around the spring but on the other hand there was surprisingly low number of total bacterial counts; however detected Escherichia coli indicated probable fecal contamination.
This article presents karstological prospecting of selected areas in Ras Al-Khaimah Emirate, UAE. Several locations in Musandam Mountains have been explored for caves, karst springs and surface karst ...features. Two karst springs, Khatt and MeBreda, were analyzed for basic physical, chemical and microbiological parameters. Although they are both recharged from karst aquifers, they differ significantly. The first one is a thermal spring in which infiltrated rain water is mixed with more saline and mineralized water from greater depths. The location of the second one at the high altitude of 710 m a. s. l. is conditioned by the existence of a less permeable zone within a carbonate aquifer with a larger share of dolomite. There were increased concentrations of nitrates probably due to grazing goats around the spring but on the other hand there was surprisingly low number of total bacterial counts; however detected Escherichia coli indicated probable fecal contamination.
In last 30th years in Slovenia study and interpretations of the cave sediments and sediments on karst surfaces went through different stages in accordance with then prevailing various theoretical ...models, knowledges about karst processes and especially the development of dating methods. Clastic sediments on the surface and in the caves are different in e.g. size, shape, color, texture and have various proveniences. One of the characteristics of the Kras is red soil although the surface sediments color in Kras comprehends all varieties from yellow to red. The color of unconsolidated clastic sediments was in the past defined by climate; the yellow color reflected the sedimentation in cold climate. The study of the mineral composition showed that yellow color is usually an indicator of sediments of Eocene flysch origin, which were weathered in different degree. In contact with percolating water those sediments can become reddish due to rubification (oxidation). In sediments from caves close to the surface and from unroofed caves sediments no minerals indicating loess origin were found. In opened fissures and fault zones were studied infiltrated loam and tectonic clays. By mineral composition studies of cave alluvial sediments was also noticed that in many cases high amount of carbonate clasts is significant originated from incomplete solution of cave walls.
The second book in the new collection Karstology in Development Challenges in the Karst brings together the findings obtained in planning and construction of motorways in the Karst. More than 350 new ...caves were opened up in the final wave of construction. This was followed by studies on arranging karstic features for tourism and their management. We also selected studies on karstic ecology, in which we made use of biological and microbiological research. At the end there is a summary of everything we need to take into account in planning different encroachments in karstic areas.
South China Karst 1 Chuxing, Huang; Gabrovšek, Franci; Zupan Hajna, Nadja ...
1998
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The book is a results of the scientific co-operation between the Karst Research Institute at ZRC SAZU, the Yunnan Institute of Geography and Institute of Geology of the Chinese Academy of Sciences. ...The researches were carried out near Liupanshui, the western part of Guizhou, in karst between the mountains in Guizhou and Yunnan Plateau, in the area of Lunan stone forests and in cone-karst at Xichou, Yunnan. General characteristics of the areas, lithological and structural properties, geomorphological, speleological and hydrogeological characteristics are presented, as well as various types of land use and their environmental impacts.
Research represent in this monograph (Incomplete Solution Of Carbonate Rocks In Karst Caves Of Slovenia) was dedicated to incomplete solution of limestones and dolomites in karst caves~that is to ...occurrence of thick, soft weathered zones of “soluble” residue of carbonate rocks. With field and laboratory analyses I have tried to find out what is happening within the carbonate rocks during weathering and why they do not dissolve completely. Solution penetrates into the rock along various textures and structures. Results of analysis have shown that during weathering limestones and dolomites become purer~Mg, Sr and U are leached out, structure of the rock becomes more porous. In the cases when surface of weathered rock come in contact with flowing water, the water tears exposed particles and transports them away. If water does not flow over the exposed particles fast enough, they remain attached to the wall of the cave. The ratio between corrosion and the mechanical erosion of carbonate rocks on cave passages walls is more significant for the formation of roughness and rocky relief on the wall than for the growth of the passage. Microorganisms are present in the processes, but it is not yet known if they contribute to the weathering. From research follows that zones of white porous rock on cave walls are a product of weathering and are not precipitated secondary minerals.
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