Concerning the principles of development of mineral resources in the polar zone of Russia by small enterprises

Increasing the efficiency of developing deposits of solid minerals in the polar zone of the northeast of Russia is an objective necessity. Unlike traditional territories, the peculiarities of the region predetermine the use of new approaches and methods in studying the feasibility of developing various deposits, including the widely represented relatively small deposits. Compared to large ones, medium and small mining enterprises operating or created on their basis have fewer opportunities to protect their interests. Their design and actual technical and economic indicators are generally worse than those of more powerful economic entities. The decrease in the scale effect can be achieved in various ways. Reduction of risks in the implementation of investment projects is possible through more thorough study and subsequent additional training, as a rule, complex in structure and heterogeneous in quality deposits involved in operation. A set of basic and private principles of different levels and values has been formed, which should guide small and medium-sized enterprises in the planning, design and development of deposits in the polar zone of Russia. Its use in the preparation and decisionmaking allows at least partially to reduce the impact of complicating and costly production factors.

Reversal of Sun’s polar magnetic field in solar cycle

The connection of solar activity expressed by international sunspot (Wolf) numbers in the northern and southern hemispheres of the Sun in the current 24th cycle with the time of polar magnetic field reversal in the corresponding hemisphere is investigated. It was obtained that: – The change of the sign of the polar magnetic field at the southern pole occurs almost a year later than in the north. – The polar magnetic field reversals do not coincide with the maximum activity in each of the hemispheres. In the northern hemisphere, the activity maximum was observed almost one and a half years earlier than the first polar field reversal and two and a half years earlier than the third or final one. In the southern hemisphere, the activity maximum was observed almost a year earlier from the change of the field sign at the pole. – The maximum of the 24th cycle almost coincides with the time of the change of the sign of the magnetic field at the northern pole. – In each of the hemispheres, the change in the sign of a magnetic field in the polar zone above 55 degrees occurred almost two years earlier than the final polar field reversal. The second and third changes of the sign of the total field in the polar zone above 55 degrees occurred shortly after the corresponding polar field reversal. – In the northern hemisphere, the polar field reversals occur at the time of maximum values of the inclination of the heliospheric current sheet, and in the south – almost two years after the maximum inclination of the HCS. – Three-fold polar field reversal at the northern pole occurs at small values of polar magnetic field measured at the Wilcox Solar Observatory while single reversal at the southern pole occurs at sufficiently high value of the corresponding measured polar field.