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Том 33, 4, 2014 |
| N.V. Tsukanov, T.N. Palechek, A.V. Colovyev,
D.P. Saveliev. Tectono-stratigraphic
complexes of the southern segment of the Kronotsky paleoarc
(East Kamchatka): their structure, age, and
composition 3 S.V. Trofimenko, V. G. Bykov. The model of crustal block movement in the South Yakutia geodynamic testing area based on GPS data 18 B.I. Semenyak. Textural-structural features of ores of the Pravourmiisky deposit as reflection of its genesis conditions (Khabarovsk Region, Russia) 28 N.V. Berdnikov, T.G. Shumilova, S.A. Pyachin, M.A. Pugachevsky, A.A. Cherepanov, S.I. Isaenko, N.F. Karpovich, V.S. Kopmarova. Phase state of the carboniferous matter in metalliferous shales of Russian Far East 42 V.Y. Fridovsky, G.N. Gamyanin, I. P. Lolufuntikova. Gold-quartz and antimony mineralization of the Maltan deposit (NE Russian) 50 M.V. Ivanov. Mercury in the bottom sediments of the North Asia marginal seas 63 I.Yu. Rasskazov, M.A. Gurman, T.N. Aleksandrova, L.I. Scherbak. Mineralogical-technological peculiarities and prospects of processing of the Uchaminsky deposit resistant gold-arsenical ore (Khabarovsk Region) 75 S.A. Medvedeva. Mesozoic sandstones and reconstruction of tectonic depositional environments in the Bureya Basin (Far East) 83 Yu. P. Yushmanov. Structural-tectonic patterns of gold distribution in the Pilda-Limuriysky ore district, Lower Priamurie 99 N.I. Belyanina, P.S. Belyanin. Paleovegetation of the accumulative plain of Tumen River (Tumangan) in the Middle Neopleistocene time 110 Jubilees Sherman S. I. 117 N.V. Tsukanov, T.N. Palechek, A.V. Coloviev, D.P. Saveliev Tectono-stratigraphic complexes of the southern segment of the Kronotsky paleoarc (East Kamchatka): their structure, age, and composition Eastern Kamchatka peninsulas are mostly composed of tectono-stratigraphic complexes in the limits of the Late Cretaceous to Eocene Kronotsky paleoarc. The Kronotsky-Komandor paleoarc was accreted to the Kamchatka margin of the Northeast Asia in the Late Cenozoic, indicating the last collision event in the formation of the present-day structure of Kamchatka. New evidence on the age, composition and structure of the southern Kronotsky-Komandor paleoarc tectono-stratigraphic complexes are presented. The earliest formations constituting these complexes are demonstrated to be Campanian volcanic and sedimentary rocks, which were formed under different geodynamic conditions. The magmatic formations studied belong to mid-ocean ridge tholeiitic series (the Vetlovsky complex) and island arc tholeiitic and calc-alkali series (the Shipunsky suite and Kronotsky series). Key words: volcanic arcs, magmatic complexes, radiolarian analysis, geochemistry, Late Cretaceous, basalts, andesites, rhyodacites, Kamchatka. S.V. Trofimenko, V. G. Bykov The model of crustal block movement in the South Yakutia geodynamic testing area based on GPS data Results of the analysis of the crustal block movement obtained from GPS data in the South Yakutia geodynamic testing area, located at the junction of two major tectonic structures, namely, the Aldan Shield of the Siberian Platform and the Stanovoy fold-block area, are shown. The drift of the block in the southeastern direction corresponds to the main azimuth of the strike of the activated fault systems and is consistent with the results of geodetic measurements carried out in the 70s and 80s of the 20th century. Based on periodic components of the complete displacement vector, the hinge-type movements along faults are established. It is shown that in the annual cycles the rotational, oscillational and translational movements of the block are of nonlinear character, and the formation of strain solitary waves is possible in the zones of activated faults. Key words: recent geodynamics, GPS data, block movement, nonlinear model, the Aldan Shield, South Yakutia testing, South Yakutia testing area. B.I. Semenyak Textural-structural features of ores of the Pravourmiisky deposit as reflection of its genesis conditions (Khabarovsk Region, Russia) The textural-structural features of ores and ore-enclosing metasomatites of the Pravourmiisky tungsten-tin deposit are discussed. The zonation elements in the distribution of different genetic types and morphological kinds of textures and structures have been revealed in the ore zone vertical section. It was established that the greatest diversity with prevalent cataclastic textures is characteristic of the middle (along the section) interval of the ore zone where the main industrial tin mineralization of greisen type is concentrated. Upwards the section, this mineralization is replaced by the quartz-tourmaline one dominated by the copper ore charge with a wide development of structures (microstructures) of the solid solution decay, testifying to the high-temperature conditions of ore emplacement. The diversity of the ore textural-structural features is caused by a long history of development of the deposit structure that was formed under conditions of the small-amplitude fault-thrust fault when the periods of compression were repeatedly changed by the periods of a comparative quiet or a weak tension. Key words: tungsten-tin mineralization, textures, structures, genesis, Pravourmiisky deposit, Khabarovsk Region. N.V.
Berdnikov, T.G. Shumilova, S.A. Pyachin, M.A.
Pugachevsky, A.A. Cherepanov, S.I. Isaenko, N.F.
Karpovich, V.S. Kopmarova
Phase state of the carboniferous matter in metalliferous shales of Russian Far East Results of examination of carboniferous matter in shales of some deposits and shows of Russian Far East are considered by different methods such as scanning and transmission electron microscopy, Raman scatter spectroscopy, X-ray phase and differential thermal analysis. It has been shown that the carboniferous matter of high-temperature (amphibolite facies) shales from the Soyuznoe deposit is composed of complete crystalline graphite, while low-temperature (greenshist facies) shales are dominated by nanocrystalline graphite.At the natural material it was substantiated that at high temperatures of the system development platinum is assimilated by the graphite. This should be taken into account when prospecting works are planned and developing techniques of carboniferous ore enrichment because in contrast to low-temperature carbonaceous shales with nanocrystalline graphite in their high-temperature analogues complete crystalline graphite can be platinum-bearing. Key words: graphite, phase state, carboniferous shales, platinum, Russian Far East. V.Yu.
Fridovsky, G.N. Gamyanin, L. I. Polufuntikova
Gold-quartz and antimony mineralization of the Maltan deposit (NE Russian) The relationships between gold-quartz and antimony mineralization of the Maltan Deposit was considered in long-developing tectonic zones. It is shown that orogenic gold-quartz mineralization is localized in the interlayer longitudinal thrusts, feathering its zones, quartz veins and veinlets. Just as gold mineralization, antimony mineralization was formed in the same but reactivated structures, in the shear field of tectonic stresses. The paper describes indicator microstructural markers typical of multi-stage deformation processes which have been expressed in antimony ores and enclosing rocks. Mineral associations and the typomorphic features of the minerals of gold and antimony mineralization stages are analyzed. It has been established that the Maltan deposit is similar to the classic large gold-antimony objects of the Adycha-Tarynskaya zone, the extensive and intensive influence of the mineral-forming fluid of antimony mineralization stage on the early mineral matrix of low-sulfide gold-quartz mineralization. Key words: structural analysis, deformation, ore zones, Gold-quartz and antimony mineralization, mineral associations, mineralization stages, localization conditions, NE Russian. M.V. Ivanov Mercury in the bottom sediments of the North Asia marginal seas The content and distribution of mercury in the bottom sediments of the Northeast Asia marginal seas was studied. Maximum mercury contents are found in the areas with active geodynamic conditions and anthropogenic areas of the Amur Bay, the Sea of Japan. Geochemical association of mercury and other chemical elements were identified. Hg background contents have been determined in the superficial bottom sediments of the studied seas. Key words: mercury, heavy metals, bottom sediments, geochemistry, geoecology, Arctic, Okhotsk Sea, Sea of Japan. I.Yu. Rasskazov, M.A. Gurman, T.N. Aleksandrova, L.I. Scherbak Mineralogical-technological peculiarities and prospects of processing of the Uchaminsky deposit resistant gold-arsenical ore (Khabarovsk Region) Results of mineralogical research of resistant gold-arsenical ores of the Uchaminsky deposit are presented. The research was carried out by a complex of modern complementary physicochemical methods. The revealed mineralogo-technological peculiarities of the pyrite-arsenopyrite concentrates served as a foundation for examination of the conditions of their high-temperature oxidation. The possibility of application of stage oxidation-sulfided and oxidative roasting for uncovering of fine-impregnated gold and removal of 92.14 - 95.6 % of low–toxic arsenic out of pyrite–arsenopyrite concentrates for the following cyanidation has been found experimentally. Principle combined flow diagram for gold extraction is proposed, which includes gravitation and flotation processing with metallurgical extraction of resistant gold-arsenic concentrates, providing exclusion of environment pollution by toxic arsenic compounds. Key words: resistant ore, flotation, pyrite-arsenopyrite concentrates, stage oxidation-sulfided and oxidative roasting, gold extraction, combined flow diagram, Khabarovsk Region. S.A. Medvedeva Mesozoic sandstones and reconstruction of tectonic depositional environments in the Bureya Basin (Far East) Early Jurassic to Early Cretaceous tectonic depositional environments were reconstructed for the first time based on the investigation of matter composition of sandstones from Soloni-Urgal interfluve, Bureya sedimentary basin, Far East. Mineralogo-petrographic and lithochemical studies revealed that the sandstones are mostly quartz-feldspathic and feldspathic graywacke of acid composition and lithites, graywacke arkose, arkoses in limited distribution. In the process of Lower/Middle Jurassic sediment deposition are reconstructed active continental margin and continental volcanic arc environments, and during accumulation of the Upper Jurassic to Lower Cretaceous deposits – more quiet environments of the passive continental margin. In the Late Toarcian-Aalenian, Late Bajocian, Late Oxfordian-Kimmeridgian orogenic events occurred that led to the breaks in sedimentation. Key words: sandstones, Jurassic, Cretaceous, continental margin, volcanic arc, Bureya sedimentary basin, Far East Russian. Yu. P. Yushmanov Structural-tectonic patterns of gold distribution in the Pilda-Limuriysky ore district, Lower Priamurie The important role of shift tectonics in localization of gold mineralization in Lower Priamurye has been determined. The Pilda-Limuriysky gold-bearing zone is controlled by a S-shaped flexure which consists of Jurassic and Cretaceous terrigenous rocks as a result of the left strike-slip faults with an amplitude of 200 km along the Limurchansky and those parallel to it faults forming a wide meridional zone of viscous displacement. The shift zone displays a number of lithological, structural and magmatic features favorable for searching gold and platinum in the black shale carbonaceous and terrigenous sediments. Agnie-Afanasevsky, Pocrovka-Troitsk, Uchaminsky, Dyappe, Martemyanovsky, and Delken ore fields and flank ore deposits are potentially large-tonnage gold ore objects of the Pilda-Limuriysky gold-bearing zone. Key words: left strike-slip faults, structural paragenesis, pull-apart, gold-bearing zones, black shales, Lower Priamurie. N.I. Belyanina, P.S. Belyanin Paleovegetation of the accumulative plain of Tumen River (Tumangan) in the Middle Neopleistocene time New analytical data on the climatic changes and landscapes reconstruction during the Middle Neopleistocene (marine isotope stages 11-6) are obtained on the basis of biostratigraphic division of lacustrine sediments of the accumulative plain in the lower part of the Tumen River. Six phases of paleovegetation evolution of the extreme southern of the Russian Far East are determined. A number of major climatic warming and cooling events during this period were identified which are reflected in the lithology of sediments and spore-pollen spectra. Key words: lacustrine deposits, Middle Neopleistocene, paleovegetation, the Pritumangan river depression, Southern Russian Far East. |