INFLUENCE OF PLASTIC DEFORMATION ON THE PHYSICAL PROPERTIES OF GRANULAR QUARTZ

Author(s):  
Alexander Polyashov ◽  
◽  
Andrey Zaporozhets ◽  
Ivan Nazarov

Purpose. To study traces of plastic deformation in quartz of crystalline rocks of the Sea of Azov. Methodology. Work was done in the field to observe the crystallinity of the crystalline rocks of the Sea of ​​Azov. In laboratory conditions, samples were made from samples taken of rocks and quartz, in which traces of plastic deformation were observed qualitatively by visual and optical methods by transmission and reflection. In natural and ultraviolet light, the physical properties of quartz were quantified, and the effects of luminescence in quartz samples and quartz sandstone material were studied and analyzed. Results. The forms of manifestation of quartzity in crystalline rocks of the Azov Sea were studied, geological bodies composed of quartz were tested, samples were taken from samples taken to observe traces of plastic deformation. The fact of luminescence of granular quartz was established, in which traces of plastic deformation act as luminescence centers. The luminescence of Donbass Carboniferous sandstones is shown, in which quartz grains, which bear traces of plastic deformations, serve as luminescence centers. Scientific novelty. A scientific fact has been established that traces of plastic deformation serve as centers of luminescence of quartz. Practical significance. The established effect of the relationship between quartz luminescence and traces of plastic deformation can be used in the field as a diagnostic sign of plastic deformation of quartz and in mine ones for qualitative control of the impact hazard of Donbass sandstones. Keywords: quartz content, granular quartz, luminescence, luminescence center, traces of plastic deformation, impact hazard of sandstones.

Author(s):  
Yuri Fedorov ◽  
Yuri Fedorov ◽  
Irina Dotsenko ◽  
Irina Dotsenko ◽  
Leonid Dmitrik ◽  
...  

The distribution and behavior of certain of trace elements in sea water is greatly affected by both physical, chemical and hydrometeorological conditions that are showed in the scientific works of prof. Yu.A. Fedorov with coauthors (1999-2015). Due to the shallow waters last factor is one of the dominant, during the different wind situation changes significantly the dynamics of water masses and interaction in the system “water – suspended matter – bottom sediments”.Therefore, the study of the behavior of the total iron in the water of the sea at different wind situation is relevant. The content of dissolved iron forms migration in The Sea of Azov water (open area) varies from 0.017 to 0.21 mg /dm3 (mean 0.053 mg /dm3) and in Taganrog Bay from 0.035 to 0.58 mg /dm3 (mean 0.11 mg /dm3) and it is not depending on weather conditions.The reduction in the overall iron concentration in the direction of the Taganrog Bay → The Sea of Azov (open area) is observed on average more than twice. The dissolved iron content exceeding TLV levels and their frequency of occurrence in the estuary, respectively, were higher compared with The Sea of Azov (open area).There is an increase in the overall iron concentration in the water of the Azov Sea on average 1.5 times during the storm conditions, due to the destruction of the structure of the upper layer and resuspension of bottom sediments, intensifying the transition of iron compounds in the solution.


Author(s):  
Olga Arkhipova ◽  
Elena Chernogubova ◽  
Tamara Tarasova

Coastal zones are integral natural and socio-economic territorial-water system, combined by a complex structure of interactions. Coastal geosystems are unique, rich in natural resources, which determines their attractiveness for industrial and residential, recreational, transport and other activities, but also makes them environmentally vulnerable. Sustainable development of the coastal zone is determined by the economic, social, and environmental components. The research area of interest is the coastal zone of the Sea of Azov (Rostov Region). The subject of the study is the state of medical and environmental safety of the territories. The purpose of the study is the analysis of medical-ecological and socio-demographic factors as the basis for sustainable development of the coastal zone of the Sea of Azov. A systematic approach has been implemented to assess the sustainable development of the coastal zone and to develop methods for analyzing and integrating heterogeneous data. Changes in the coastal zone were evaluated based on a comparative analysis of multizone satellite imagery with ground-based studies, data from thematic maps. For the analysis of medical and environmental safety, an author’s technique was used, combining traditional methods and geoinformation technologies based on ArcGis Desktop*. The environmental quality indicator was considered in terms of the impact on human health. Assessment of demographic security was carried out based on the coefficient of demographic well-being / prosperity of the territory. The incidence rate of malignant neoplasms was considered as a highly informative and socially significant indicator of the health status of the population. For analysis, we used the SSC RAS database for 2006-2016. A comprehensive analysis of the development factors of the coastal zone of the Sea of Azov showed significant problems in the studied region. The most attractive areas of the coastal zone of the Sea of Azov from the point of view of infrastructure development are at the same time subject to changes due to dangerous natural phenomena. Analysis of demographic indicators confirmed the presence of adverse demographic processes.


Author(s):  
A.E. Tsygankova ◽  
L.A. Bespalova ◽  
A.A. Magaeva ◽  
E.V. Bespalova ◽  
D.A. Podkolzina

The purpose of this work is to comprehensively study the ecological and geological conditions and the results of monitoring studies of the coastal territories of the Taganrog Bay and the Sea of Azov to identify the degree of manifestation of dangerous coastal processes (DCP). The subject of the study is to assess the degree of manifestation of DCP under the influence of various natural factors, both constant in time (geological structure, height of the coastal cliff), and changing (dynamics of the level, waves, wind regime) and the impact of man-made causes. The performed factor analysis allows us to assert that the main natural factor of the intensification of DCP is the extreme surge levels (adverse end dangerous events: AE and DE). The types of shores are constant, but with different degrees of manifestation of DCP, they change significantly. As a result, according to these studies, maps were constructed for the average long-term (1980), intensive manifestation (2013–2014) and the period with a relatively calm manifestation of the intensity of DCP (2018–2020). According to the activity, the manifestations of DCP are divided into 4 types: type I – with a very high c (>4 m/year), type II – with a high (2–4 m/year), type III – with an average (1–2 m/year), type IV – with a weak rate (<1 m/year) of abrasions, which include subtypes of banks formed by exogenous processes (abrasive, abrasive-landslide, accumulative), indicating the conditions of their formation and the reasons for the isolation of the danger of coastal processes.


Author(s):  
Yuri Fedorov ◽  
Yuri Fedorov ◽  
Irina Dotsenko ◽  
Irina Dotsenko ◽  
Leonid Dmitrik ◽  
...  

The distribution and behavior of certain of trace elements in sea water is greatly affected by both physical, chemical and hydrometeorological conditions that are showed in the scientific works of prof. Yu.A. Fedorov with coauthors (1999-2015). Due to the shallow waters last factor is one of the dominant, during the different wind situation changes significantly the dynamics of water masses and interaction in the system “water – suspended matter – bottom sediments”.Therefore, the study of the behavior of the total iron in the water of the sea at different wind situation is relevant. The content of dissolved iron forms migration in The Sea of Azov water (open area) varies from 0.017 to 0.21 mg /dm3 (mean 0.053 mg /dm3) and in Taganrog Bay from 0.035 to 0.58 mg /dm3 (mean 0.11 mg /dm3) and it is not depending on weather conditions.The reduction in the overall iron concentration in the direction of the Taganrog Bay → The Sea of Azov (open area) is observed on average more than twice. The dissolved iron content exceeding TLV levels and their frequency of occurrence in the estuary, respectively, were higher compared with The Sea of Azov (open area).There is an increase in the overall iron concentration in the water of the Azov Sea on average 1.5 times during the storm conditions, due to the destruction of the structure of the upper layer and resuspension of bottom sediments, intensifying the transition of iron compounds in the solution.


Author(s):  
Olga Arkhipova

The methodology for developing a web version of the Electronic Ecological Atlas of the Sea of Azov is based on the use of “cloud” technology of the geoportal — an open platform that is completely built on world industry standards and supports various types of data and services. In 2019, the static part of the Ecological Atlas of the Sea of Azov (Atlas) was completed and posted on the organization’s website, based on the use of standard website creation methods. The objective of the study is to expand the standard means of presenting Atlas data by introducing interactive web applications into it. Web applications are developed on the ArcGis Online platform using Esri standards. As part of the development of the dynamic part of the Atlas, two interactive web applications were created: “Ecological study of the seas of the south of Russia” and “Water Protection Zone of the Sea of Azov”. The application “Ecological study of the seas of the south of Russia” includes thematic maps built on the basis of interactive queries, including maps of the distribution of observation stations by year, by executors and type of observation, as well as infographics and data tables. The web application allows you to create maps that clearly show the results of field research and measurements in the Azov Sea region, as well as allow visual analysis of data from different years, add your own tabular relationships. The purpose of the application developed “Water protection zone of the Azov Sea” is the empowerment of the Atlas through the introduction of interactive web applications tightly themed. One of the objectives is to assess the impact of economic activity on the coastal zone of the Sea of Azov within the water protection zone.


AMBIO ◽  
2004 ◽  
Vol 33 (1) ◽  
pp. 63-67 ◽  
Author(s):  
Gennady G. Matishov ◽  
Vladimir V. Denisov ◽  
Sergey L. Dzhenyuk ◽  
Oleg V. Karamushko ◽  
Dag Daler

TAPPI Journal ◽  
2016 ◽  
Vol 15 (10) ◽  
pp. 643-651 ◽  
Author(s):  
ROBERT J. OGLESBY ◽  
HUMPHREY J. MOYNIHAN ◽  
RICARDO B. SANTOS ◽  
ASHOK GHOSH ◽  
PETER W. HART

The impact of commercially prepared, fully bleached pulp viscosity variation on handsheet physical properties was evaluated at different levels of pulp refining. Hardwood pulps from the same brownstock species mix, cooking parameters, and kappa numbers were processed through two different commercial bleach plants: one with a D0(EP)D1D2 sequence and the second with an OD0(EOP)D1 sequence. Additionally, a commercial softwood (predominately Scotts pine) brownstock pulp bleached by an OD0(EP)D1D2 sequence was employed in this study. Pulps with viscosities ranging from 14 to 21 mPa∙s were refined in a Valley beater to two freeness levels, and the associated handsheet physical properties were measured in this study. Over the pulp viscosity range of 14 to 21 mPa∙s, no clear correlation was found to exist between pulp viscosity and related paper physical properties. Finally, a series of laboratory prepared bleached pulps were purposely prepared under non-ideal conditions to reduce their final viscosities to lower values. Handsheets made from these pulps were tested in their unbeaten condition for physical strength properties. Significant and rapid strength loss occurred when the measured pulp viscosity dropped below 12 mPa∙s; overall strength properties showed no correlation to viscosity above the critical 12 mPa∙s value.


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