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Том 33, 3, 2014 |
| A.V. Koloskov, L.I. Gontovaya, S.V.
Popruzhenko. The upper mantle of Kamchatka in
isotopic-geochemical and geophysical anomalies. The role of
astenospheric diapirism 3 S.A. Kasatkin, V.V. Golozubov, Phung Van Phach, Le Duc Anh. Evidences of Cenozoic strike-slip dislocations of the Red River fault system in the Paleozoic carbonate rocks of the Cat Ba Island (Northern Vietnam) 14 A.N. Glukhov. Geochemical specialization of Upper Proterozoic complexes of the Prikolymian Terrane, NE Russia 29 Yu.O. Redin, V.M. Kozlova. Gold-bismuth-telluride mineralization in the ores of the Silver ore deposit (Lugokansky ore zone, East Transbaikalie) 39 V.I. Gvozdev, D.G. Fedoseev, A.V. Gurikov, S.I. Sadkin, B.I. Semenyak, V.V. Ratkin. Mineralogy of accompanying elements of ores of the Kordonny skarn scheelite-sulfide deposit (Primorsky Krai) 53 O.A. Karas’, V.A. Pakhomova, N.I. Ekimova. Granitoid massif of the Dalnegorsk borosilicate deposit, Primorye, Russia: the role of intrusion in the formation of boron mineralization 67 A.S. Prytkov, N.F. Vasilenko, V.V. Ershov. Modeling of the Yuzhno-Sakhalinsk mud volcano eruption in 2011 by GPS data 79 S.E. Sirotskii, G.V. Kharitonova, V.I. Kim, M.A. Klimin, N.P. Chizhikova, Z. Tyugai, N.S. Konovalova, E.V. Utkina. The granulometric and microelemental composition of bottom sediments in the Amur River middle and lower reaches 88 A.V. Koloskov, L.I. Gontovaya, S.V. Popruzhenko The upper mantle of Kamchatka in isotopic-geochemical and geophysical anomalies. The role of astenospheric diapirism Data on the isotopic-geochemical studies, seismic tomography and gravimetric survey of the Kamchatka and Bering Sea regions are correlated. It was shown that the isotopic-geochemical anomalies revealed are in good accordance with the geophysical data. It was suggested that the anomalies in the Central Kamchatka and Bering Sea regions are the result of local diapirs penetration into the lithosphere, the activities of which are associated with the formation of the rocks of intraplate geochemical type. The junction of the Kurile-Kamchatka and Komandor-Aleutian island arc systems is characterized by an elevated portion of the crust material in the composition of volcanic rocks of the mantle genesis and combination of the island and intraplate types. Key words: isotopic-geochemical composition, seismic tomography, gravimetry, lithosphere, mantle diapirs, Kamchatka peninsula, Bering Sea. S.A. Kasatkin, V.V. Golozubov, Phung Van Phach, Le Duc Anh Evidences of Cenozoic strike-slip dislocations of the Red River fault system in the Paleozoic carbonate rocks of the Cat Ba Island (Northern Vietnam) Structural researches of carbonate rocks of the Cat Ba Island in the northeastern flank of the Red River fault system have been carried out. It was established that gently folded strata are cut by the strike-slip fault zones of NW (300–310º) trending. Ductile and brittle dislocations were developed under the dominating influence of left-lateral displacements along fault zones against the background of ENE (80º) regional stress field during the Oligocene-Miocene deformation stage. The latest Pliocene-Quaternary deformations occur under the NNW (330–350º) stress field and are weakly developed here. Seismic monitoring indicates that these dislocations are in progress as yet. Key words: Cenozoic strike-slip dislocations, Paleozoic carbonate rocks, Red River fault system, Cat Ba Island, Northern Vietnam. A.N. Glukhov Geochemical specialization of Upper Proterozoic complexes of the Prikolymian Terrane, NE Russia The paper considers the distribution of the base metal chemical elements in the Upper Proterozoic structural-matter complexes of the Prikolymian Terrane, NE Russia. Their chalcophylic geochemical specialization was established. Based on the sialic type of geochemical specialization, the maturity of the continental crust in the Upper Proterozoic was suggested. It was shown that epigenetic mineralization inherited the geochemical specialization of the enclosing Late Proterozoic complexes. This fact is evidence of active tectono-magmatic evolution of the Prikolymian Terrane in the Phanerozoic time. Key words: Proterozoic, geochemical specialization, mineralization, Prikolymian Terrane, NE Russian. Yu.O.
Redin, V.M. Kozlova
Gold-bismuth-telluride mineralization in the ores of the Silver ore deposit (Lugokansky ore zone, East Transbaikalie) Au-Bi-Te (gold-bismuth-telluride) mineralization of the Silver ore deposit was established and studied. X-ray spectral analysis of native gold and sulfide minerals and data on their isotopic composition of sulfur are presented. Two mineral associations comprising native gold were distinguished: early gold- pyrite-arsenopyrite, and later gold – polymetallic ones. As part of the latter association gold-bismuth-telluride mineralization was determined. It contains bismuth sulfides, sulfotellurides and tellurides, native bismuth and native gold, and also intermetallic gold and bismuth. A theory of genetic link between gold-bismuth-telluride mineralization and monzonite porphyry of the Shakhtama complex was suggested. In addition, results of 40Ar/39Ar dating are given. Key words: gold-bismuth-telluride mineralization, Eastern Transbaikalia. V.I.
Gvozdev, D.G. Fedoseev, A.V. Gurikov, S.I. Sadkin,
B.I. Semenyak, V.V. Ratkin
Mineralogy of accompanying elements of ores of the Kordonny skarn scheelite-sulfide deposit (Primorsky Krai) Using the drill core we have studied the ores of the Kordonny skarn scheelite-sulfide deposit located in the Malinovsky ore zone, Primorsky Krai. We considered the mineralogy of sulfide ores and distinguished two associations of the accompanying elements (Pb-Bi and Ag-Pb-Bi) characterizing the tungsten and tin mineralization, accordingly. A short description of rare minerals is given, their correlations are shown, and typomorphic features of minerals are described. The problems of ore genesis are discussed, and their mineralization is compared with that of the reference objects of the region. Key words: skarns, mineralogy, tungsten deposits, genesis, Primorsky Krai. O.A. Karas’, V.A. Pakhomova, N.I. Ekimova Granitoid massif of the Dalnegorsk borosilicate deposit, Primorye, Russia: the role of intrusion in the formation of boron mineralization Granitoids of the Dalnegorsk borosilicate deposit are the rocks of calcic and alkali-calcic series with predominantly high-potassic and metaluminous composition. The thermobarogeochemical studies reveal that the granitiods originated from low-aqueous melts (H2O < 3.5 %), at a minor part of carbonic acid and under crystallization temperature and pressure interval of 800–850 °C and 65–90 MPa, respectively. Findings on the average elements content in the rock-forming minerals and the initial water content of magma testify that there is no genetic affinity between intrusion and boron mineralization. The granitic melts which formed the Dalnegorsky massif participated in skarns formation, boron mobilization and its redeposition in the accumulation positive medium. K/Ar datings (51.0 ± 1.0 Ma), geochemical typification (characteristics of intraplate, subduction- and collision-related granitoids) and the low water content of primary granitic melts, in accordance with a scheme of the geodynamic evolution of the region, testify to their formation in the lithospheric plates sliding environment. Key wards: granitoids, melt inclusions, geochemistry, lithospheric plates sliding, Eocene, Primorye. A.S. Prytkov, N.F. Vasilenko, V.V. Ershov Modeling of the Yuzhno-Sakhalinsk mud volcano eruption in 2011 by GPS data Sakhalin Island is a unique region of the Far East of Russia where mud volcanoes exist. The Yuzhno-Sakhalinsk mud volcano is situated in the south of the island in the zone of the Central-Sakhalin thrust. Horizontal and vertical surface displacements caused by the 2011 eruption were revealed for the first time by GPS data. The model of a finite spherical eruption source in an elastic half-space was constructed using the inversion method of the surface displacements. The location of the eruption source (latitude, longitude, depth) and its possible size were determined. The erupted quantities of clay rock, water and gas were valued. Key words: mud volcano, eruption, Earth’s surface displacements, GPS measurements, modeling, Sakhalin Island. S.E. Sirotskii, G.V. Kharitonova, V.I. Kim, M.A. Klimin, N.P. Chizhikova, Z. Tyugai, N.S. Konovalova, E.V. Utkina The granulometric and microelemental composition of bottom sediments in the Amur River middle and lower reaches Bottom sediments of the Amur River basin have been studied. Their granulometric and gross compositions have been analyzed. The influence of the Sungari River on both the formation of water runoff and suspended load, and the composition of bottom sediments is shown. It has been established that the Fe, Mn, Zn, and Cu content in finely-dispersed subfractions was twice as large as that in the bottom sediments. The role of clay minerals and diatoms in Fe, Mn, Zn, and Cu accumulation is shown. Key words: bottom sediments, grain sizing, minor elements, Amur River, Far East of Russia. |