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M.?G.?LeonovEmail author A.?K.?Rybin V.?Yu.?Batalev V.?E.?Matyukov G.?G.?Shchelochkov 《Geotectonics》2018,52(2):157-172
The structural and geodynamic features of the Pamirs and the Hissar–Alay have been revealed based on geological and geophysical evidence supplemented by experimental data. It has been shown that both the Pamirs and the Hissar–Alay are geodynamic systems, the formation of which is related to interference of two geodynamic regimes: (i) global orogeny covering extensive territories of Eurasia and determining their similarity and (ii) regional regimes differing for the Pamirs and the Alay, which act independently within Central Asian and Apline–Himalayan mobile belts, respectively. The Pamirs do not act as an indentor during the formation of structure of the Hissar–Alay and areas to the north. It is stated that the Pamir–Alay segment of Asia is a reflection of the geodynamic countermotion setting (3D flow of mountain masses) of several distinct segments of the continental lithosphere, while the Pamirs are an intracontinental subduction domain at the surface, which represents a special tectonic–geodynamic type of structures. 相似文献
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E. A. Bataleva E. S. Przhiyalgovskii V. Yu. Batalev E. V. Lavrushina M. G. Leonov V. E. Matyukov A. K. Rybin 《Doklady Earth Sciences》2017,475(2):930-934
Based on a complex study of the upper crust structure in the southern margin of Kochkor basin (Northern Tien Shan), including study of the structure of the Cenozoic sedimentary cover, the deep geoelectrical structure, the structural unconformities, and occurrences of recent deformations in the basement rocks, new geological–geophysical cross sections are constructed. The cross sections show both fault structures that penetrate the cover from the basement and flat interplate detachments with related fold-overthrust structures. The comparison of the cross sections has established the absence of common planes of fault extensions along the entire margin of the hollow, except for the zone where the margin and the hollow adjoin, which can be caused by the zones of dynamic influence of secondary faults, the zones of fracturing, and the zones of cataclasis of blockwise disintegrated granite massifs. 相似文献
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V.Yu. Batalev E.A. Bataleva V.V. Egorova V.E. Matyukov A.K. Rybin 《Russian Geology and Geophysics》2011,52(12):1592-1599
Magnetotelluric soundings (MTS) in the Kyrgyz Tien Shan along 74° and 76° E profiles reveal conductors in the crust which delineate the boundaries of the At-Bashi accretionary-collisional zone and the Issyk-Kul microcontinent. Correlated to earthquake converted-wave patterns (vP) along the MANAS profile collected in 2007, the geoelectric model for the At-Bashi zone lends support to the hypothesis that the position and dip of large thrust sheets, as well as the way and direction of exhumation of eclogites in this zone, are similar to those in Northwest China. Petrological analysis, geothermobarometry, and elastic P-wave velocities measured in laboratory on lower-crust and upper-mantle xenoliths indicate that at the time when the xenoliths were dragged to the surface about 70 Ma ago, the Moho was 20 km shallower than now (35 km against 55 km) and the heat flux was 20 mW/m2 higher (80 against 60 mW/m2). 相似文献
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M.?G.?LeonovEmail author A.?K.?Rybin V.?Yu.?Batalev V.?E.?Matyukov G.?G.?Shchelochkov 《Geotectonics》2018,52(1):73-87
The position of the Pamirs and the Hissar–Alai mountainous system in the structure of Central Asia and features of their junction are considered. It is shown that their outer contours and tectonic infrastructure are significantly distinct in the planar pattern: latitudinally linear and arched for the Hissar–Alai and the Pamirs, respectively. These structures logically match those of the Central Asian and Alpine–Himalayan belts, respectively. The Pamir orogen is a relatively autonomous structural element of the crust, which is located discordantly relative to the country lithospheric blocks. Most of the Pamirs (at least, the Northern and Central) probably form a giant allochthon on the ancient basement of the Tarim and Afghan–Tajik blocks. The junction zone of these two “hard” crustal segments is reflected in the transverse Transpamir threshold, which is expressed in the relief, deep structure, and seismicity. The specific geological structure of the junction zone of the Pamirs and Hissar–Alai (systems of the Tarim, Alai, and Afghan–Tajik troughs) is shown. It suggested that this zone is a damper, which significantly neutralizes the dynamic influence of the Pamir and the southernmost elements of the Pamir–Punjab syntax on Hissar–Alai structures. 相似文献
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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
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A.K. Rybin V.V. Spichak V.Yu. Batalev E.A. Bataleva V.E. Matyukov 《Russian Geology and Geophysics》2008,49(5):337-349
High-density array MT soundings of the crust in the seismically active northern Tien Shan were performed using Phoenix MTU-5 stations in the Bishkek Geodynamic Polygon, at the junction of the Chu basin and the Kyrgyz Range. The MT transfer functions were determined to an accuracy of 1–2% (amplitude) and about 0.5–0.8 deg (phase) in most of 145 soundings. Preliminary analysis of the collected data aimed at estimating the geoelectrical dimensionality. The Bahr decomposition analysis indicated the presence of local 3D structures in the crust of the area superposed on the regional 2D structure. 相似文献
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THE ROLE OF ATMOSPHERIC CIRCULATION PATTERNS IN AGROCLIMATE VARIABILITY IN FINLAND, 1961–2011
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MASOUD IRANNEZHAD DELIANG CHEN BJØRN KLØVE 《Geografiska Annaler: Series A, Physical Geography》2016,98(4):287-301
This study evaluates interannual variations and trends in growing season daily temperature sum and daily precipitation sum in Finland during 1961–2011, and their connections to well known atmospheric circulation patterns. Changes in summer (June–August) climate partially explain changes in growing season daily temperature sum and daily precipitation sum over Finland, which naturally decreased from south to north. On a national scale, growing season warmed and became wetter during 1961–2011, as growing season daily temperature sum and daily precipitation sum significantly (p < 0.05) increased by 5.01 ± 3.17°C year–1 and 1.39 ± 0.91 mm year–1, respectively. The East Atlantic pattern was the most influential atmospheric circulation pattern for variations in growing season daily temperature sum (rho = 0.40) across Finland and the East Atlantic/West Russia pattern was most influential for growing season daily precipitation sum variability (rho = –0.54). There were significant (p < 0.05) increasing trends in growing season daily temperature sum and daily precipitation sum throughout Finland during 1961–2011. Increased growing season daily temperature sum was mainly observed in northern, central, western, eastern and coastal areas of south‐western Finland. This warming was positively associated with the East Atlantic pattern in the north, centre and south, but negatively associated with the East Atlantic/West Russia pattern in eastern Finland. Increased GSP mostly occurred in southern, eastern, western, central, northern and north‐western Finland. These wetting trends were positively correlated with the East Atlantic pattern in the north and negatively correlated with the Polar pattern in the south and the East Atlantic/West Russia pattern in the east, west, centre and north‐east of Finland. The overall agroclimatic year‐to‐year variability in Finland between 1961 and 2011 was mostly linked to variations in the East Atlantic and East Atlantic/West Russia patterns. 相似文献
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M. N. Berdichevsky E. Yu. Sokolova Iv. M. Varentsov A. K. Rybin N. V. Baglaenko V. Yu. Batalev N. S. Golubtsova V. E. Matyukov P. Yu. Pushkarev 《Izvestiya Physics of the Solid Earth》2010,46(8):679-697
During the past two decades, at the Research station (Bishkek) more than a hundred magnetotelluric and magnetovariational
soundings were carried out on the Naryn geotraverse that intersects the Tien Shan region from Lake Balkhash to the Tarim Basin
along the 76° E meridian. Integration and complex interpretation of the data of these soundings with improved resolution and
reliability of the geoelectric model of the Central Tien Shan section became an urgent challenge. Our paper presents a complex
of methods for processing and invariant analysis of the electromagnetic data developed for the solution of this problem. Its
application allowed us to validate the choice of the 2D interpretation model for the Naryn Line and to form the adequate ensemble
of the data to be inverted. The developed approaches will also be useful in similar studies in the other mountain regions. 相似文献
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JEAN CHALINE GENEVIèVE FARJANEL 《Boreas: An International Journal of Quaternary Research》1990,19(1):69-80
Five new palynological sequences in the Bresse valley (France), covering Reuverian, Praetiglian, Tiglian and Eburonian-Waalian times, yielded rodent teeth of the Mimomys occitanus-savini lineage evolving in Eurasia by phyletic gradualism. For the first time the west European palynological zonation is correlated with the Eurasiatic rodent one, leading to the following attributions: Mimomys occitanus: Reuverian; Mimomys polonicus : Praetiglian to early Tiglian; Mimomyspliocaenicus : Tiglian; Mimomys ostramosensis: Eburonian to early Waalian; Mimomys savini occurring from Waalian to Cromerian. As a result, the Neogene biozones MN15 to MN17 can be defined by nine new subdivisions. 相似文献
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