GEOLOGICAL MONUMENTS OF NATURE OF AMUR REGION

The brief analysis of guards and rational usage of geologic monuments to Russia is conducted. On the main(basic) value the geologic monuments of the nature are parted into seven types: stratigrafo-geokhronological, paleontological, mineral-petrographical, tectonical, geomorphological, hydrological and picturesque. The exposures of rocks and form(shape) of a surfaces having scientific or aesthetic value, permitting concern most typical to them to understand a geologic history of territory of the Amur area.

New data on distribution of basic phylogenetic lines of the Korean field mice Apodemus Peninsulae in the East of Russia

On basis of the variability data of the cytochrome b sites (992 bp), the authors analyzed a distribution of the Apodemus peninsulae phylogenetic lines in the Russian Far East and Transbaikal unexplored regions. Where studied 42 individuals from 9 localities. All species of the Apodemus peninsulae from the considered localities were assigned to the 2 phylogenetic lines of «Korea» and «Amur». It was shown that the «Korea» haplotype species are common in the southern Altai and eastern Transbaikalia, and that they inhabit the northern regions of Transbaikalia (Taksimo vicinity) as well. An assumption was made that the «Amur» group formation took place in the middle and / or lower Amur area.

Minerals of the Pb-As-Sb-S и Cu-Pb-As-Sb-S systems in the ores of berezitovoe gold-polymetallic deposit (Upper Amur region, Russia)

Composition and genesis of arsenium-antimony sulfosalts of lead from the gold-bearing ores of the Berezitovoe deposit located in the eastern part of Mongol-Okhotsk orogenic belt (Upper Amur Area) were considered. Lead sulfosalts (Cu and Pb) are presented by tsugaruite, dufrenoysite, boulangerite, menehinite, bismuthic menehinite (with Bi up to 11.5 mass%), as well as minerals of jordanite-geocronite and bournonite-seligmannite series. The studies have revealed basic features of the lead sulfosalts relationship with ore and silicate minerals in different mineral association of vain ores and regularities in their composition variations. It was found that the composite arsenium-antimony sulfosalts form quasicontinuous series of solid compounds strongly differing from each other by the rate of semimetals as well as semimetals-Pb ratio in their composition. The suggestion has been made that the main typomorphic features of composition of the arsenium-antimony sulfosalts of lead from ores of the Berezitovoe deposit were determined by the specific processes of partial melting of sulfides under the high temperature metamorphism of primary polymetallic ores.