Gurbanov A.G., Tuayev O.P., Gazeev V.M., Lexin A.B., Gurbanova O.A., Lolaev A.B. Polymetallic and gold-sulfide-quartz with epg mineralization, in the toar-aalen carbon-terrigenousflyschoid (black shale) strata of the fiagdon-terekmetallogenic subzone of the samuro-belorechensk metallogenic zone (North Caucasus)
Abstract. Recently, in the field of Geology of gold deposits, a fundamental problem is to identify the nature and causes of platinum and palladium - bearing gold deposits established for a number of fields in the Far East, Chukotka, North-East Asia, the Urals, and the TienShan. Central Russia (ferruginous quartzites of the giant reserves of the KMA and BMA deposits), and in the last 15 years, the North Caucasus, where Au-Pt-Pd mineralization associated with the Devonian black shale was detected. In 2018, we have identified a new source of noble metal (Au-Pt-Pd) mineralization, associated with the early-medium-Jurassic black slates in the territory of Mountain Ossetia. The article provides information about the evolution of metal genetics in this part of the North Caucasus in the Kimmeria era. The main results of the search for gold-silver and gold-sulfide types of mineralization in Mountain Ossetia, conducted by JSC “Sevosegologorazvedka” and JSC “North-Caucasian PGO" within the Kakadur-Lamardon ore zone, which is part of the Avsandur-Lamardon ore field, are presented.
It was conducted that the Toar-Aalen carbon-terrigenousflisoid (black-shale) strata, which holds the Kakadur-Hanikom and Kadat-Hampaladagpolymetallic core deposits, as well as perspective ore bodies with vein and stockwork gold-containing lead-zinc and gold-sulphide-quartz types of mineralization, has increased (for S, Fe2O3, Cr, Ni, Cu, Zn, As, Zr, Pb, Sb, Rb, Ag, Au, Pd, Pt, Ru) metal content. A comprehensive analysis of the obtained data suggests that convection was the main mechanism for the formation of noble metal mineralization. The" trigger " for its launch could be zones of active faults, dissimilar movements which led, due to friction, to the heating of black shale stratum.As a result, there was a convection of heated in tectonically active zones vadose waters, located in the black shale strata, and their movement to the front part of the emerging hydrothermal-metasomatic column. This tectonic activity was observed in the studied area and was associated with the pre-Kelleway phase of folding
Keywords polymetallic and gold-sulfide-quartz mineralization with EPG; metallogenic zone; gold_platinous black-shale type of mineralization, North Caucasus
Gazeev V.M., Gurbanov A.G., Gurbanova O.A. Industrial stones of the Northern Caucasus (onyx marble)
Abstract. Based on a study of geological reports, scientific publications and our own field investigation the list of industrial stones which are occurring at the Northern Caucasus have been established. Briefly geological description of the most typical manifestations and deposits of popularity industrial stones - onyx marble have been done. It was shown that in the region there are several morphological types of it manifestations 1 - in surfacial bed bodies of travertines; 2 - in a karst cavity in a limestone and gypsum of the Tithonian stage; 3 - separate veins and lenticular bodies. Colourgamma of onyx marble from northern Caucasus have been revealed. It is note, that their colour is vary from yellow with a shades of honey, amber and red up to saturated broun and dark-brown colour.. Probable age of this onyxmarble have been consider
Keywords industrial stones, onyx marble, travertines, karst cavity, calcite,aragonite
Certain parameters of the demographic forecast for the regions of the NC FD and methods of their calculation
Abstract. The article examines the main parameters of the demographic forecast of the population of the regions of the North Caucasus until 2036. The expected parameters of the population size, its structure and demographic processes are analyzed. Economic and mathematical forecasting methods are characterized.
Keywords demographic forecast, forecast options, population size, fertility, mortality, forecasting methods.