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Vol. 17 (2014 year), No. 2

Yu.L. Voytekhovsky
Definition, classification and matrix description of rock texture transformations

For the first time the system of definitions and mathematical approaches has been proposed to describe a crystalline rock as a topological, tolerant, measurable, metric and correlated (partly ordered) space. It has been also defined as a realization of a spatially distributed random function in which a mineral species of any grain can be calculated from its neighborhood. A petrographic texture has been defined as a rock invariant fixed by the diagonal form of an intergrain contact probability matrix. A petrographic textures classification has been given by means of quadratic forms theory while their transformations have been described in terms of matrix algebra.

(in Russian, стр.5, fig. 1, tables. 0, ref 11, Adobe PDF, Adobe PDF 0 Kb)

Vol. 17 (2014 year), No. 2

Yu.L. Voytekhovsky, Yu.N. Neradovsky, N.N. Grishin, E.Yu. Rakitina, A.G. Kasikov
Kolvitsa field (geology, material composition of ores)

Findings on the geological structure, texture, mineral and chemical structure of the Kolvitsa titanomagnetite ore deposit have been reported with a history of discovery and exploration attached. For the first time, a full composition of minerals and enclosing rocks of the deposit has been presented. It has been shown that the titanomagnetite mineralization is accompanied by a copper-nickel sulfide mineralization where the principal minerals are pyrrhotine, pentlandite, bornite, cubanite, walleriite, and makinavite. High contents of nickel, copper and cobalt impurities are caused by sulfides of the titanomagnetite ore. On this basis the Kolvitsa iron-titanium-vanadium ore field has been proposed to be considered a complex Fe-Ti-V-Ni-Cu-Co deposit.

(in Russian, стр.8, fig. 5, tables. 1, ref 11, Adobe PDF, Adobe PDF 0 Kb)

Vol. 17 (2014 year), No. 2

D.G. Stepenshchikov, Yu.L. Voytekhovsky
On the structural defects of graphene

The problem of improving the defects in graphene and fullerenes (which are nothing but the graphene fragment closed in the quasispherical cages) is of big interest for nano-technologies. The most known method to do this is the Stone-Wales transformation. A generalization of the method which allows improving a bigger variety of defects has been proposed in the paper.

(in Russian, стр.5, fig. 8, tables. 0, ref 17, Adobe PDF, Adobe PDF 0 Kb)