Shagrova Alyona
The faculty of Geology
The Major in geological survey, reconnaissance and exploration
The Theme of the thesis work:
Geochemical features of Novoselovskoye appearance of molybdenum in the context of future rare-metal ore in the East Coast of Sea of Azov
The scientific adviser: associate professor, candidate of geologo-mineralogical sciences Victor Alehin
Materials on the theme of master's work: About author
Introduction
Applicability of the subject
At the present stage of science and technology development there is the enlargement of mineral resources base of rare metals as well as the increase of its production and consumption. In the basis of the modern technique, there are rare metals, which are used in many spheres of industry. In the last few years, it’s proved a high prospectiviyy of rare metals and poly metals. The Azov block particularly its east part [6]. The territory of investigation is the biggest industrial region of Ukraine. In spite of the 12 place among the other regions according to the area, it has not only the biggest number of population but has a high home market capacity, high level of scientific-technological progress, powerful industrial capacity, and also a highly qualified labor stuff. The specific feature of this region is fact that it’s characterized by the high concentration of industrial potential oriented to the foreign markets [2]. In connection with the above stated the applicability of the searches of deposit of non-ferrous metals (tungsten and molybdenum) in the described region is evident.
The purpose of the research
The purpose of the research of the ore administration is the examination of the geochemical features of Novoselovskoye appearance of molybdenum in the context of future rare-metal ore in the East Coast of Sea of Azov.
The goals of the researches of Novoselkovskoye ore administration are the following
The research object
Is Novoselovskoye appearance of molybdenum in East Cost of Azov Sea.
The research subjects
Are the geochemical fields of Novoselovskoye ore administration.
The estimated bottom line and expected scientific novelty
In the result of the conducted researches for the first time the elements-indicators were fixed for the object, and also geochemical features of Novoselkovskoye ore administration of molybdenum (the molybdenum is connected by the positive correlations with Cu, Zn, Be, Ag и W, negative correlations with Ba и Nb). The comparison was carried out of the association, that appeared in the result of the researches on Novoselkovskoye section and the elements association that are in elevated concentration on the hydrothermal deposits according to Alekseyenko V.A. The conducted researches and the received data could be used at the estimation of the availability and the further development of the Novoselkovskoye ore administration of molybdenum.
1 The geological structure of the working area
The most promising part of East Cost of Azov Sea is Novoselkovskoye ore administration of molybdenum that was opened in 1989 by geologists of Priazovskyy KGP.
Novoselovskyy sector is dedicated to the block of primordial rocks presented by greenstone-enderbite-gneiss, greenstone-gneiss, plagio migmatite of Tokmakskyy complex, among of which the lines, lenses of crystal shale, gneisses and amphibolites are developed in western part of Azov series. Block is squeezed by two extrusions: from the west – selvedge of Anadolskyy massif of the homonymous complex, from the east – quartz syenite of Kalmiusskyy massif of chlebodarovskyy complex. The crystalline rock is covered by case of quaternary argil sand ground of the capacity from 1 to 7 m. On the sector the system of breaking-down disruptions of north-west direction (dip azimuth 40-450, dip angle 70-850), is represented by crushed zones and cataclasis of capacity from 2 to 4 m, and even more, besides crushed zones of submeridial direction [2].
Picture 1 Schematic geological map of Novoselovskyy sector: 1 – Novoselovskoye appearance of molybdenum; 2 – points of lithochemical well testing; 3 – wells with elevated concentration of molybdenum; PR1an – rocks of anadolskyy complex of paleoproterozoy; PR1hd – rocks of khlebodarovskyy complex of paleoproterozoy; AR3tk – rocks of tokmakskyy neoarkhy.
2 The research methodology
During the investigation, the data of semiquantitative spectrum analysis of 20 chemical elements of top soil were used. The selection of 12 elements is the most informative. The selection volume is 1099 samples. Using the package MS Excel, the statistical characteristics for 12 chemical elements were calculated (W, Be, Mo, Li, Cu, Zr, Yb, Zn, Ag, Pb, Ba, Nb): the arithmetic mean, dispersion, standard deviations. The calculation was carried out according to the selection of the content, from which the hurricane values exceeding the mode more than ten times were excluded. According to the results of statistical processing also the values of variation coefficients (table 1) was fixed for the given elements (W, Pb, Ba, Be, Nb, Mo, Cu, Li, Zr, Zn, Ag). For the tungsten this value is the highest, that’s indicative of its rather no uniform distribution in the rocks, for Mo, Cu, Ag, La this value is less, but exceeds 50%, so the distribution of these elements is also uneven. The high variation coefficients are the evidence of redistribution of the elements in the top soil that is the most important factors of formation of deposits [7]. At the estimation of the availability of the ore administrations, the most important thing is quantity of jointly concentrating elements of typomorphic association, connected by relative positive relations. It is the more their quantity in soil the more their availability in ore body [11].For the given elements, the correlation analysis was carried out, with the result of association of chemical elements selection.
The most interesting chemical element for this sector – is molybdenum that has relative positive connection with Cu, Zn, Be, Ag, W , the relative negative connection the molybdenum has with Ba, Nb. These elements are the elements –indicators that have the signs of search prediction of ore mineralizing of molybdenum in Novoselkovskyy sector of East Cost of Azov Sea. While examination of the type of mineralization of the given ore administration the comparison characteristic was carried out. There were the associations of the elements selected in the results of correlation analysis and that were in high concentration in bedrocks on hydrothermal deposits of quartz paragenesis according to the classification of Alekseyenko V.A. were compared. According to his idea into the association of the elements of the high concentration on hydrothermal deposits of quartz paragenesis the following elements are included: Au, As, Fe, Bi, Mo, W, U, Si, Cu [15].
Table 1 Information of cross-correlation treatment of maintenances of elements in soils on the area of Novoselovskiy.
** Correlation is meaningful at level 0,01
* Correlation is meaningful at level 0,05
After comparison with the own results one could say that there is a concurrence only with three elements: Mo, W и Cu. Owing to this one could state that the type of mineralization is tungsten-copper-molybdenum.
All the above said statements are the basic for the comparison of the chemical description of Novoselovskoye appearance of molybdenum in the context of future rare-metal ore.
Literature
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Materials on the theme of master's work: About author