Geochemistry of late Cenozoic lavas on Kunashir Island, Kurile Arc     

Alexey Y.  Martynov  Jun-Ichi  Kimura  Yuri A.  Martynov  Alexsander V.  Rybin 《Island Arc》2010,19(1):86-104

Middle Miocene to Quaternary lavas on Kunashir Island in the southern zone of the Kurile Arc were examined for major, trace, and Sr–Nd–Pb isotope compositions. The lavas range from basalt through to rhyolite and the mafic lavas show typical oceanic island arc signatures without significant crustal or sub-continental lithosphere contamination. The lavas exhibit across-arc variation, with increasingly greater fluid-immobile incompatible element contents from the volcanic front to the rear-arc; this pattern, however, does not apply to some other incompatible elements such as B, Sb, and halogens. All Sr–Nd–Pb isotope compositions reflect a depleted source with Indian Ocean mantle domain characteristics. The Nd and Pb isotope ratios are radiogenic in the volcanic front, whereas Sr isotope ratios are less radiogenic. These Nd isotope ratios covary with incompatible element ratios such as Th/Nd and Nb/Zr, indicating involvement of a slab-derived sediment component by addition of melt or supercritical fluid capable of mobilizing these high field-strength elements and rare earth elements from the slab. Fluid mobile elements, such as Ba, are also elevated in all basalt suites, suggesting involvement of slab fluid derived from altered oceanic crust. The Kurile Arc lavas are thus affected both by slab sediment and altered basaltic crust components. This magma plumbing system has been continuously active from the Middle Miocene to the present.  相似文献   

Tectonic structure and evolution of the Hissar–Alay Mountain Domain and the Pamirs     

M.?G.?LeonovEmail author  A.?K.?Rybin  V.?Yu.?Batalev  V.?E.?Matyukov  G.?G.?Shchelochkov 《Geotectonics》2017,51(6):566-583

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Water in Parental Basaltic Magmas of Menshyi Brat Volcano (Iturup Island,Kurile Islands)     

Nizametdinov  I. R.  Kuzmin  D. V.  Smirnov  S. Z.  Rybin  A. V.  Kulakov  I. Yu. 《Doklady Earth Sciences》2019,486(1):525-528

Doklady Earth Sciences - Data from the study of minerals of the liquidus association (olivine and spinel) from high-Mg basalts (up to 10 wt % MgO) of Menshyi Brat Volcano (Iturup Island) are...  相似文献   

Specific Features in the Deep Structure of the Naryn Basin–Baibichetoo Ridge–Atbashi Basin System: Evidence from the Complex of Geological and Geophysical Data     

A. K. Rybin  E. A. Bataleva  Yu. A. Morozov  M. G. Leonov  V. Yu. Batalev  V. E. Matyukov  O. B. Zabinyakova  V. O. Nelin 《Doklady Earth Sciences》2018,479(2):499-502

New magnetotelluric data were obtained for the Karabuk profile crossing the Naryn basin–Baibichetoo Ridge–Atbashi basin geodynamic system (Central Tien-Shan). The complex geological–geophysical cross section along the profile provides a good agreement between the surface tectonic structures and the deep geoelectric model. The electric conductivity anomalies revealed as subvertical conductors striking along the flanks of basins may be explained by the zones of dynamic influence of faults and cataclasis of granite.  相似文献   

Model of the Deep Structure of the Elbrus Volcano in the Light of New Geophysical Data     

Gorbatikov  A. V.  Rogoghin  E. A.  Stepanova  M. Yu.  Kharazova  Yu. V.  Sysolin  A. I.  Rybin  A. A.  Andreeva  N. V. 《Doklady Earth Sciences》2018,480(1):642-645

A geophysical section by the method of microseismic sounding is obtained along the profile that completely crosses the Elbrus volcano in the area of its eastern summit. The peculiarities of the deep structure and edifice of the Elbrus volcano are revealed.

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Deep Structure of the Lithosphere in the Central Tien Shan along the Son-Kul Magnetotelluric Sounding Profile     

Rybin  A. K.  Bataleva  E. A.  Matiukov  V. E.  Morozov  Yu. A.  Nepeina  K. S. 《Doklady Earth Sciences》2021,496(2):101-106

Doklady Earth Sciences - New results of a detailed study of the deep structure of the Central Tien Shan along the Son-Kul magnetotelluric (MT) profile crossing the Son-Kul Lake are reported. Based...  相似文献   

Electromagnetic Studies of Present Geodynamic Processes in the Lithospheres of the Regions of Intracontinental Orogeny: the Tien Shan Example     

Rybin  A. K.  Bataleva  E. A.  Aleksandrov  P. N.  Nepeina  K. S. 《Izvestiya Physics of the Solid Earth》2022,58(5):690-705

Izvestiya, Physics of the Solid Earth - Abstract—Electromagnetic investigation of stress-strain state dynamics in the geological medium is based on the analysis of two groups of physical...  相似文献   

Nature of electric conductive layers of the upper crust and infrastructure of granites of the Central Tien Shan     

A. K. Rybin  M. G. Leonov  E. S. Przhiyalgovskii  V. Yu. Batalev  E. A. Bataleva  V. D. Bragin  Yu. A. Morozov  G. G. Schelochkov 《Doklady Earth Sciences》2016,470(1):968-971

We studied the infrastructure of granite massifs of the Central Tien Shan and its correlation with the electric conductive layer of the upper crust, which made possible to reveal new peculiarities of the structure of the granite layer in the region and to clarify the nature of low resistivity layers.  相似文献   

Satellite and ground observations of the June 2009 eruption of Sarychev Peak volcano, Matua Island, Central Kuriles     

Alexander Rybin  Marina Chibisova  Peter Webley  Torge Steensen  Pavel Izbekov  Christina Neal  Vince Realmuto 《Bulletin of Volcanology》2011,73(9):1377-1392

After 33 years of repose, one of the most active volcanoes of the Kurile island arc—Sarychev Peak on Matua Island in the Central Kuriles—erupted violently on June 11, 2009. The eruption lasted 9 days and stands among the largest of recent historical eruptions in the Kurile Island chain. Satellite monitoring of the eruption, using Moderate Resolution Imaging Spectroradiometer, Meteorological Agency Multifunctional Transport Satellite, and Advanced Very High Resolution Radiometer data, indicated at least 23 separate explosions between 11 and 16 June 2009. Eruptive clouds reached altitudes of generally 8–16 km above sea level (ASL) and in some cases up to 21 km asl. Clouds of volcanic ash and gas stretched to the north and northwest up to 1,500 km and to the southeast for more than 3,000 km. For the first time in recorded history, ash fall occurred on Sakhalin Island and in the northeast sector of the Khabarovsky Region, Russia. Based on satellite image analysis and reconnaissance field studies in the summer of 2009, the eruption produced explosive tephra deposits with an estimated bulk volume of 0.4 km³. The eruption is considered to have a Volcanic Explosivity Index of 4. Because the volcano is remote, there was minimal risk to people or infrastructure on the ground. Aviation transport, however, was significantly disrupted because of the proximity of air routes to the volcano.  相似文献   

Role of climatic and volcanogenic factors in the formation of organogenic sediments and the development of landscapes on Simushir Island (Central Kurile Islands) in the middle-late Holocene     

N. G. Razzhigaeva  L. A. Ganzei  N. I. Belyanina  T. A. Grebennikova  Kh. A. Arslanov  N. F. Pshenichnikova  A. V. Rybin 《Russian Journal of Pacific Geology》2013,7(3):199-211

It is shown that the development history of landscapes on Simushir Island includes several stages marked by their reorganizations, which were caused by climate changes and volcanic eruptions. The stratigraphic data derived from sections of the soil-tephra cover in different areas of the island and from the peatland section on the Dushnaya Bay coast served as the basis for the paleogeographic reconstructions. They include data on the palynological spectra of the fossil and recent soils and peatland; the latter also yielded diatom assemblages. The radiocarbon dates and tephrostratigraphic record provided age estimates for the corresponding events.  相似文献