Том 32, 1, 2013 |
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A.S. Byakov. New zonal scheme of the Permian deposits of NE Asia from bivalves. Paper 2. Problems of correlation 3 L.F. Mishin. Formation conditions of hypabyssal granitoid intrusions by the example of the Sizindzhinsky Massif, Okhotsk-Chukotka volcanic belt 18 A.N. Didenko, A.Yu. Peskov, V.A. Guryanov, A.N. Perestoronin, A.V. Kosynkin. Paleomagnetizm of the Ulkan trough (SE of Siberian craton) 31 V.M. Nikiforov, R.G. Kulinich, M.G. Valitov, I.V. Dmitriev, S.S. Starzhinsky, G.N. Shkabarnya. Specific features of the fluid lithospheric regime in the junction zone of South Primorye and Japan Sea from geophysical data 54 A.N. Samchenko, V.N. Karnaukh, K.I. Aksentov. Geological-geophysical studies of the upper sedimentary cover and geoacoustic model for the Posiet Bay shelf (the Sea of Japan 65 E.V. Sasorova, M.Yu. Andreeva, B.W.Levin. Seismic dynamics of the Kuril Arc on the basis of the multidimensional statistical analysis 75 T.A. Fokina, G.V. Shevchenko. Spectral-time analysis of strong earthquakes in the central part of the Kuril Ridge (2006–2009) 85 V.M. Anokhin, M.E. Melnikov. Morphostructural features of the Butakov Guyot (Magellan Mountains, Pacific Ocean) 92 E.A. Vakh, A.S. Vakh, N.A. Kharitonova. The presence of REE in the waters of the hypergenetic zone of the sulfide ores, the Beresitovy deposit (Upper Priamurie) 105 Yu.A. Forina, V.P. Shesterkin, N.M. Shesterkina. Phosphorus in the waters of the taiga rivers of the northern Sikhote-Alin 116 A.S. Byakov New zonal scheme of the Permian deposits of NE Asia from bivalves. Paper 2. Problems of correlation Problems of intraregional and regional correlation of the Permian sequences of NE Asia are considered based on the new zonal biostratigraphic scheme from bivalves. Interregional correlation of the Permian deposits was carried out within the eastern Boreal superregion and some adjacent regions. The possibilities and problems of the Permian correlation from bivalves in the regions outside the Boreal are discussed. Key words: Permian, bivalves, zones, correlation, Northeast Asia. L.F. Mishin Formation conditions of hypabyssal granitoid intrusions by the example of the Sizindzhinsky Massif, Okhotsk-Chukotka volcanic belt The Sizindzhinsky hypabyssal intrusive massif located in the Kuidusunsky volcanic zone of the Okhotsk-Chukotka volcanic belt was mapped and studied in detail. As a result, a complex of structural-petrographic features pointing to formation of granitoids in situ by successive replacement of the enclosed sedimentary rocks of the Upper Verkhoyansk complex and medium-grained diorites (rarely gabbro) by more ancient granites. It was determined that the earliest intermediate fine-grained rocks developed as xenoliths in all granitoids are relicts of the undisplaced remelted substrate. Key words: granitoids, xenoliths, volcanic zone, space problem, Okhotsk-Chukotka volcanic belt. A.N. Didenko, A.Yu. Peskov, V.A. Guryanov, A.N. Perestoronin, A.V. Kosynkin Paleomagnetizm of the Ulkan trough (SE of Siberian craton) The first results of the paleomagnetic study of one of the key Paleoproterozoic objects of the Aldan- Stanovoy shield – Ulkan trough of the Bilyakchan-Ulkan volcanoplutonic belt are presented. The sedimentary-volcanogenic rocks of Elgetei Formation and granites of the Ulkan Complex have been studied. According to these data and their comparison with Paleoproterozoic pole’s apparent wander curve of the Angara-Anabar block, the Ulkan trough: 1) was located in time of the formation of the studied rocks at 18-26o S, and 2) experienced rotation relative to the Angara-Anabar block at -70 ± 8 o in the interval 1732-1720 million years ago. Based on the combined interpretation of paleomagnetic, geochronological and geochemical data published previously, a paleogeodynamic model is proposed. According to this model, the Aldan-Stanovoy and Angara-Anabar provinces of the Siberian craton became a single rigid block about 1720 million years ago. Key words: pole’s apparent wander curve , paleomagnetism, Ulkan Complex, Elgetei Formations, Bilyakchan-Ulkan volcano-plutonic belt , Aldan-Stanovoy province, Siberian craton. V.M. Nikiforov, R.G. Kulinich, M.G. Valitov, I.V. Dmitriev, S.S. Starzhinsky, G.N. Shkabarnya Specific features of the fluid lithospheric regime in the junction zone of South Primorye and Sea of Japan from geophysical data New data on the fluid lithospheric regime in the junction zone of the continent and marginal seas are presented. For the first time a comprehensive interpretation of the geophysical methods has been used to solution of this problem including magnetotelluric and magnetovariation exploration and unique investigations of the variations of the electric field on JASC (Japan Sea Cable), and structural-density modeling, thermometry and thermodynamics. A joint analysis of distribution of electric conductivity, density and temperature in the lithosphere enabled substantiation of participation of mantle fluids in the formation of structural-matter complexes which are quite different beneath the continent and marginal Sea of Japan. Key words: fluid regime, hydration, magneto-telluric exploration, geoelectric profile, structural-density modeling, JASC, Sea of Japan. A.N. Samchenko, V.N. Karnaukh, K.I. Aksentov
Geological-geophysical studies of the upper sedimentary cover and geoacoustic model for the Posiet Bay shelf (the Sea of Japan). The paper presents the results of seismic and acoustic works and geological testing of the bottom sediments in the Posiet Bay carried out by the authors in 2007-2009. A cluster analysis of the acoustic features of the bottom sediments has been fulfilled and a geoacoustic model for the upper part of the sedimentary layer has been constructed in digital format. An example of application of GIS-medium for model visualization is demonstrated. Key words: continuous seismic profiling, seismic facies, bottom sediments, geoacoustic model, Posiet Bay, Japan Sea. E.V. Sasorova, M.Yu. Andreeva, B.W.Levin
Seismic dynamics of the Kuril Island on the basis of the multidimensional statistical analysis The present paper considers spatial-temporal distributions of the earthquakes in the Kuril-Okhotsk region. Events: with Ms 4 for the time interval from1980 to 2009 and with Ms 7 from 1910 to 2009 (20576 and 76 earthquakes, respectively) have been investigated. The specialized complex of programs prepared by the authors enabled to get four-dimensional distributions of the seismic events (in sections, depths, time intervals and power levels). A clear spatial clustering of the seismic events is traced both in sections and depths. The spatial-temporal analysis of the earthquakes with Ms 4 in six five year intervals for the period 1980-2009 has revealed a cyclic increasing and decreasing of the seismic activity in various time intervals and cyclic migration of the activity between South and North Kuril Islands. The study of strong earthquakes with Ms 7 in twenty-five years for the period 1910-2009 demonstrated that a number of great seismic events substantially reduced in the last 30 years. The distribution of these events in depths also was also considerably changed. The peaks of seismic activity which fall on 1915-1919, 1955-1969, and 2005-2009, are separated by 35 years intervals of decrease in seismic activity. Key words: hypocenter spatial-temporal distributions, seismic event clustering, time cycles, Kuril Islands. T.A. Fokina, G.V. Shevchenko Spectral-time analysis of strong earthquakes in the central part of the Kuril Ridge (2006-2009) The method of spectral-time analysis (STAN) was used for analysis of records of seismic signals of three broadband seismic stations IRIS (in the Petropavlovsk-Kamchatsky, Yuzhno-Sakhalinsk and Yakutsk) of strong earthquakes in the central part of the Kuril Trench in 2006 2009 (three of them have caused tsunamis of varying intensity). It was revealed that low-frequency limit of seismic oscillations manifestation associated with the Rayleigh surface waves depends on the magnitude of the earthquake, and in the future it can be used as an additional criterion of tsunamigenic earthquakes, although this problem requires significant additional research. According to the manifestations of P-and S-waves in the STAN diagrams, such a link could not be detected. Key words: earthquake, magnitude, seismic waves, surface waves, spectral-time analysis, dispersion, tsunamigeneity, Kuril Islands. V.M. Anokhin, M.E. Melnikov Morphostructural features of the Butakov Guyot (Magellan Mountains, Pacific Ocean) Structural features of the Butakov Guyot are investigated based on comparison of phototelevision profiling (approximately eight thousands photos of the oceanic floor) and multibeam data. The network of linear structures of the guyot is revealed, and regularities of their orientation are visualized in rose-charts. Several structural steps have been identified which complicate slopes and peak plateau of the guyot, and a possible version of its history is suggested. The data point to an increased tectonic activity of the Butakov Guyot relative to other guyots, an existing division of the guyot into the northern and southern blocks, and correspondence of the main directions of its linear structures to four global systems of planetary fracture network. Key words: guyots, phototeleprofiling, steps, faults, blocks, Magellan Mountains, Pacific Ocean. E.A. Vakh, A.S. Vakh, N.A. Kharitonova The presence of REE in the waters of the hypergenetic zone of the sulfide ores, the Beresitovy deposit (Upper Priamurie) The contents and distribution of REE in the ground and surface waters in the zones of gold-sulfide ores hepergenesis of the Beresitovy deposit, Upper Priamurie, have been studied for the first time. Anomalous high REE concentrations have been revealed in the ore waters of the deposit and surface waters of the Konstantinovsky Stream as well. The obtained results have been correlated with the background REE concentrations in the surface waters of the ore field and data on concentration of these elements in granites and ore-bearing metasomatites of the deposit. It was demonstrated that the content and specific features of REE accumulation in aqueous medium are determined by physical- chemical processes in the hypergenetic zone of the sulfide ores rather than by the presence of high REE concentrations in granites. It was established that in the course of the ore waters formation a selective accumulation of lanthanoids of middle group occurs. In addition, in the line La-Lu a degree of migration abilities of lanthanoids is increased from light to heavy. Key words: REE, hepergenesis, surface and ground waters, Beresitovy deposit, Upper Priamurie. Yu.A. Forina, V.P. Shesterkin, N.M. Shesterkina Phosphorus in the waters of the taiga rivers of the northern Sikhote-Alin Phosphorus concentrations and its seasonal dynamics in the river waters of North Sikhote-Alin have been defined. Differences in phosphorus content in river waters caused by specific features of the underlying rocks, wildfires, and spawning of the Pacific Ocean salmons are shown. Keywords: phosphorous, mountain-taiga rivers, North Sikhote-Alin. |