Vol. 37 No. 2 (201) (2003)

The analysis of the data of deposits exploration and exploitation of the marked industrial types allows to group and to define possible limits of various errors committed at realization of prospecting works - mistakes of analogy, technical and errors connected to wrong treatment of a deposits geological structure. The questions of reduction of the typical mistakes committed at exploration of non-ferrous metals deposits are consecrated.

The article gives a brief review of principles of archaeomagnetic dating method. Presented curves of secular variations of geomagnetic field parameters in a historical period of time for the territory of Armenia, obtained on the hypothesis dipole of Earth's magnetic field. A new method of sample splitting from ovens and hearths is presented. Archaeomagnetic dating of archaeological sites of Armenia is done.

Desertification, as a natural phenomenon, is stipulated by interaction of numerous factors. The article undertakes the attempt of defining the upper border of the desertification territory by hydrological methods. For desertification upper borders the altitude of precipitation and total vaporization crossing is admitted, and for the upper territory border, which is under the desertification danger is the altitude of precipitation and evaporation crossing. The above mentioned climatic and hydrologic methods not only highlight the regularities of spatial time of desertification allocation, but also give forecast possibilities.