scholarly journals Mineralogical Search Signs for Assessment of Prospects of Diamond Capacity of Ukraine (by Physiographical and Photoluminescent Data)

2021 ◽  
Vol 43 (1) ◽  
pp. 68-86
Author(s):  
O.Yu. PALKINA ◽  
O.L. FALKOVICH
Keyword(s):  
Physical Properties ◽  
Bearing Capacity ◽  
Large Scale ◽  
Complete Removal ◽  
Economic Feasibility ◽  
The Black Sea ◽  
The North ◽  
Genetic Types ◽  
Low Efficiency ◽  
Indicator Minerals

Some important questions concerning the application of methods of searches of diamond deposits on direct search signs - finds of diamonds are considered and indicator minerals of kimberlites (IMK). The probable reasons for the low efficiency of the dressing-mineralogical method in the search for diamond deposits in Ukraine are named. The article is based on materials of research of diamonds found in different age placers of Ukraine (~1300 crystals); diamonds from kimberlites of the Arkhangelsk province (~6000 crystals); diamonds from metamorphic rocks of the Kazakhstan deposit Kumdy-Kol (~200 crystals); Yakut province (~600 crystals from root springs and ~700 from placers). A physiographic description was made for all these crystals and the intensity and color of photoluminescence (PhL) were recorded. For some crystals, about 600 spectra were taken at a temperature of 77 K. For diamonds of the "Dniester" type and some highly defective diamonds from Ukrainian placers, data from Raman spectroscopy are given. The material on indicator minerals of kimberlites is partly the result of our research, partly attracted from literature sources. Finds of diamonds in terrigenous deposits of Ukraine, their territorial and age, possible sources of income are analyzed. The comparison of diamonds from terrigenous deposits of Ukraine with diamonds of indigenous deposits of different genetic type is performed. For comparison, we studied diamonds that were obtained (with their complete removal from the gross technological samples) from some kimberlite pipes of the Arkhangelsk province. We performed a physiographic description and established the particle size distribution and morphological distribution in these pipes. Based on these studies, convincing conclusions were drawn about the signs of the industrial diamond-bearing capacity of kimberlite bodies in this province. The study of a large number of diamonds extracted from Neogene and other placers of Ukraine allowed usto perform a comparative study not only on the morphology and color of photoluminescence but also on the frequency of photoluminescence centers (spectra were taken at 77K). These diamonds were compared with crystals from the industrial kimberlite bodies of the Arkhangelsk and Yakut provinces. It was established which physical properties of Ukrainian diamonds are close to the properties of kimberlite diamonds and how they differ, contrasting features of diamond sets of different genetic types were determined. It has been established that diamonds found in the deposits of the Bilokorovichi world have signs of kimberlite, and the nature of their surfaces, a set of PhL centers, indicates a long stay in sedimentary reservoirs of different ages. A study of diamonds and IMK, which were found on the territory of the Kirovohrad block of the Ukrainian Shield (USh), revealed that the known area of Gruzka has prospects and is worth further mineral and technological testing. The chemical composition of probable IMK from the kimberlite bodies of the Priazovsky block of the USh indicates their non-diamond-bearing or non-industrial diamond-bearing capacity, which is confirmed by a few (3 crystals) finds of natural diamonds. We found that the green microdiamonds extracted from these rocks turned out to be man-made debris. Numerous diamonds from Poltava-Sarmatian placers have specific morphology and physical properties. The source of diamonds from the Black Sea coast is the Poltava-Sarmatian placers, and the source of a few diamonds with kimberlite features has not been found on the coast of the Sea of Azov. Based on the analysis, it is concluded that the territory of Ukraine has clear prospects for the discovery of diamond deposits. Taking into account the current economic feasibility and the current degree of study of the diamond-bearing territory of Ukraine, the primary search for kimberlite sources of diamonds, in the opinion of the authors should be performed in the north-western (Ovruch-Bilokorovytsia) part, as well as within the Dnieper and Kirovograd blocks. In the course of search operations, it is necessary to abandon the analysis of IMC less than 1 mm in size and pay attention mainly to pyropes as the most informative IMC.A prerequisite for further exploration work for diamond deposits should be a large-scale mineralogical and technological test aimed at detecting diamonds with a size of at least 1.0 mm limiting the size of the studied fractions will allow not only to reduce costs, but also to determine the feasibility of the search.Only based on the results of these works it will be possible to concludethe prospects of the industrial diamond-bearing capacity of the allocated areas.

The Statistical Forecasting Models of a Hail for the Western Part of the North Caucasus and the Black Sea Coast Constructed on Output Production of Global System of Forecasts (GFS NCEP)

2018 ◽  
Vol 931 ◽  
pp. 1037-1041
Author(s):  
Arthur Kh. Kagermazov
Keyword(s):  
Large Scale ◽  
Convective Cloud ◽  
The Black Sea ◽  
Model Data ◽  
North Caucasus ◽  
Independent Variables ◽  
The North ◽  
Black Sea Coast ◽  
Cloud Development ◽  
Gfs Model

Statistical models of the hail forecast are proposed for the two regions of the North Caucasus, developed from the output of the global atmosphere model GFS NCEP. Statistical schemes are obtained as a result of discriminant analysis conducted using statistical software package SPSS. Independent variables in these schemes are the most informative predictors of strong convective cloud development, calculated on the basis of the global GFS model data related to local atmospheric instability and large-scale synoptic processes. Based on the results of the operational audit, the estimates of the success of the hail forecasts according to existing criteria are given, the high values of which assume a reduction in damage from hailstorms, when using them.

scholarly journals EXPERIENCE IN DETAILED LANDSCAPE MAPPING OF THE BLACK SEA ABRASION COAST AT THE NORTH-WESTERN CAUCASUS

2021 ◽  
Vol 7 (17) (2) ◽  
pp. 108-116
Author(s):  
A.M. Aleynikova ◽  
A.P. Andreeva ◽  
O.N. Lipka ◽  
M.V. Krylenko
Keyword(s):  
Black Sea ◽  
Large Scale ◽  
Remote Sensing Data ◽  
Field Research ◽  
The Black Sea ◽  
Western Caucasus ◽  
Coastal Mapping ◽  
The North ◽  
Landscape Unit ◽  
North Western

The landscape units of the Black Sea coast of the North-Western Caucasus have complex and dynamic structures. Mapping of such systems is possible only on a large scale, by superimposing remote sensing data on field research materials. The detailed landscape maps of the marine abrasive coasts of this region were produced for the first time. The landscape structure includes identified hierarchic units: stows, substows, narrow stretched belts, and land facies. A substow was selected as the main unit of analysis for the coastal mapping. The landscape unit map exposes the activity of slope processes and the potential danger areas in the coastal zone.

scholarly journals Comparative analysis of European wide marine ecosystem shifts: a large-scale approach for developing the basis for ecosystem-based management

2011 ◽  
Vol 7 (4) ◽  
pp. 484-486 ◽  
Author(s):  
Christian Möllmann ◽  
Alessandra Conversi ◽  
Martin Edwards
Keyword(s):  
Large Scale ◽  
Marine Ecosystem ◽  
Management Strategies ◽  
Marine Ecosystems ◽  
Regime Shifts ◽  
Comparative Approach ◽  
The Black Sea ◽  
Ecosystem Structure ◽  
Ecosystem Based Management ◽  
The North

Abrupt and rapid ecosystem shifts (where major reorganizations of food-web and community structures occur), commonly termed regime shifts, are changes between contrasting and persisting states of ecosystem structure and function. These shifts have been increasingly reported for exploited marine ecosystems around the world from the North Pacific to the North Atlantic. Understanding the drivers and mechanisms leading to marine ecosystem shifts is crucial in developing adaptive management strategies to achieve sustainable exploitation of marine ecosystems. An international workshop on a comparative approach to analysing these marine ecosystem shifts was held at Hamburg University, Institute for Hydrobiology and Fisheries Science, Germany on 1–3 November 2010. Twenty-seven scientists from 14 countries attended the meeting, representing specialists from seven marine regions, including the Baltic Sea, the North Sea, the Barents Sea, the Black Sea, the Mediterranean Sea, the Bay of Biscay and the Scotian Shelf off the Canadian East coast. The goal of the workshop was to conduct the first large-scale comparison of marine ecosystem regime shifts across multiple regional areas, in order to support the development of ecosystem-based management strategies.

scholarly journals Risk assessment in the North Caucasus ski resorts

2016 ◽  
Vol 16 (10) ◽  
pp. 2227-2234 ◽  
Author(s):  
Anton Y. Komarov ◽  
Yury G. Seliverstov ◽  
Tatyana G. Glazovskaya ◽  
Alla S. Turchaninova
Keyword(s):  
Risk Assessment ◽  
Quantitative Data ◽  
Large Scale ◽  
Economic Feasibility ◽  
Individual Risk ◽  
Federal Law ◽  
North Caucasus ◽  
Protection Measures ◽  
The North ◽  
Avalanche Risk

Abstract. Avalanches pose a significant problem in most mountain regions of Russia. The constant growth of economic activity, and therefore the increased avalanche hazard, in the North Caucasus region lead to demand for the development of large-scale avalanche risk assessment methods. Such methods are needed for the determination of appropriate avalanche protection measures as well as for economic assessments.The requirement of natural hazard risk assessments is determined by the Federal Law of the Russian Federation (Federal Law 21.12.1994 N 68-FZ, 2016). However, Russian guidelines (SNIP 11-02-96, 2013; SNIP 22-02-2003, 2012) are not clearly presented concerning avalanche risk assessment calculations. Thus, we discuss these problems by presenting a new avalanche risk assessment approach, with the example of developing but poorly researched ski resort areas. The suggested method includes the formulas to calculate collective and individual avalanche risk. The results of risk analysis are shown in quantitative data that can be used to determine levels of avalanche risk (appropriate, acceptable and inappropriate) and to suggest methods to decrease the individual risk to an acceptable level or better. The analysis makes it possible to compare risk quantitative data obtained from different regions, analyze them and evaluate the economic feasibility of protection measures.

scholarly journals Tectonolinament framework of the Black Sea region and the surrounding areas

2021 ◽  
Vol 8 (1) ◽  
pp. 26-44
Author(s):  
Vladimir Pokalyuk ◽  
Igor Lomakin ◽  
Valentyn Verkhovtsev ◽  
Vladimir Kochelab
Keyword(s):  
Black Sea ◽  
Large Scale ◽  
The Black Sea ◽  
Mobile Belt ◽  
Black Sea Region ◽  
North West ◽  
North East ◽  
The North ◽  
Lateral Displacements ◽  
Surrounding Areas

Modern high-precision global digital 3-d models of the relief of the continents and the ocean floor (SRTM, GEBCO) are the objective basis to clarify the structure and features of the organization of the planetary fault network of of the Black Sea region and adjacent areas of the Mediterranean mobile belt and surrounding platform areas, to find out the location of the main transregional supermegalineaments forming the deep structural-tectonic framework of the territory. A complete consistency of the structural plan of faults and fault zones within the sea areas and continental surroundings is established. The structural position of the Black Sea basin as a whole is determined by its location at the intersection area (superposition, interference) of the diagonal (subdiagonal) transcontinental tectonolinament belts: the north-west – Elba-Zagros, Caucasus-Kopetdag, and the north-east – Atlas- Black Sea. The absence of large-scale lateral displacements at the intersection nodes of differently oriented supermegalineament systems indicates the relative autonomous stationarity and inheritance of the formation of the lyneament framework during the entire Mezozoic-Cenozoic and relatively low-shear nature of its implementation. This feature of the Black Sea region structural pattern significantly limits the possibility of using neomobilistic geodynamic models to explain the history of the geological development of the region. The strict consistency and orderliness of the lineament framework can be ensured only by global planetary factors associated with the influence of the rotational regime of the Earth's shells on the stress distribution in the lithosphere.

Why Has There Been No People’s Power Rebellion in North Korea?

2018 ◽  
pp. 1-34
Author(s):  
Andrew Jackson
Keyword(s):  
Rural Areas ◽  
North Korea ◽  
Large Scale ◽  
Political Elite ◽  
Information Control ◽  
Al Jazeera ◽  
The North ◽  
New Information ◽  
Effective System ◽  
The Right

One scenario put forward by researchers, political commentators and journalists for the collapse of North Korea has been a People’s Power (or popular) rebellion. This paper analyses why no popular rebellion has occurred in the DPRK under Kim Jong Un. It challenges the assumption that popular rebellion would happen because of widespread anger caused by a greater awareness of superior economic conditions outside the DPRK. Using Jack Goldstone’s theoretical expla-nations for the outbreak of popular rebellion, and comparisons with the 1989 Romanian and 2010–11 Tunisian transitions, this paper argues that marketi-zation has led to a loosening of state ideological control and to an influx of infor-mation about conditions in the outside world. However, unlike the Tunisian transitions—in which a new information context shaped by social media, the Al-Jazeera network and an experience of protest helped create a sense of pan-Arab solidarity amongst Tunisians resisting their government—there has been no similar ideology unifying North Koreans against their regime. There is evidence of discontent in market unrest in the DPRK, although protests between 2011 and the present have mostly been in defense of the right of people to support themselves through private trade. North Koreans believe this right has been guaranteed, or at least tacitly condoned, by the Kim Jong Un government. There has not been any large-scale explosion of popular anger because the state has not attempted to crush market activities outright under Kim Jong Un. There are other reasons why no popular rebellion has occurred in the North. Unlike Tunisia, the DPRK lacks a dissident political elite capable of leading an opposition movement, and unlike Romania, the DPRK authorities have shown some flexibility in their anti-dissent strategies, taking a more tolerant approach to protests against economic issues. Reduced levels of violence during periods of unrest and an effective system of information control may have helped restrict the expansion of unrest beyond rural areas.

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