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1.
Mikhalsky E. V. Alexeev N. L. Kamenev I. A. Larionov A. N. Gogolev M. A. Svetov S. A. Kunakkuzin E. L. 《Geotectonics》2020,54(3):285-307
Geotectonics - An assemblage of mafic granulites (schists), plagiogneisses, and metasedimentary rocks, which is referred to as the Filla Series, is exposed in the Rauer Islands (opposite the... 相似文献
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The stress state of the sedimentary rocks in the oil-and-gas fields of Sakhalin is estimated and analyzed; data from exploratory boreholes in the eastern Pacific (San-Andreas fault zone) are considered. The vertical and limiting horizontal stresses are calculated for different depths. The maximum sublateral compression can exceed the vertical stress by a factor of 1.2–4 on average in northern and southern Sakhalin. It is shown that the limiting horizontal stress and the maximum shear stress grow as the depth increases. 相似文献
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Kocharyan G. G. Besedina A. N. Kishkina S. B. Pavlov D. V. Sharafiev Z. Z. Kamenev P. A. 《Izvestiya Physics of the Solid Earth》2021,57(5):614-626
Izvestiya, Physics of the Solid Earth - Abstract—We present the results of laboratory studies of slope failure criteria by dynamic impulse loading in the range of peak ground velocities (PGV)... 相似文献
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Application of complex acoustic signals in communication systems and navigation of submersible units
Doklady Earth Sciences - 相似文献
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The second of two reports on the use of space imagery in the interpretation of Antarctica's geologic structure applies interpretation procedures described in an earlier article (see Mapping Sciences and Remote Sensing, 1985, No. 1) to produce a geologic map of a portion of the Antarctic Peninsula. Features identified on space imagery and depicted on the map include: a deep pericratonnal fault zone, a Mesozoic fold belt interrupted by a complex system of faults, and ring or annular structures of volcanic origin. Translated from: Antarktika, AN SSSR Mezhduve-domstvennaya komissiya po izucheniyu Antarktiki, Doklady komissii [USSR Academy of Sciences Joint Commission on Antarctic Research, Commission Report], No. 24. Moscow, 1985, pp. 43-49. 相似文献
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V. S. Semenov E. N. Kamenev V. M. Mikhailov I. A. Kamenev S. V. Semenov 《Geology of Ore Deposits》2009,51(8):723-740
The results of geological study of the mountain framework of the southern part of the Lambert Glacier, Mawson Escarpment,
Eastern Antarctica, are discussed. The studied territory is of key importance for understanding the regional geological history.
The Ruker and the Lambert rock complexes have been distinguished at the Mawson Escarpment. The former is subdivided into the
Mawson and Menzies groups. The polymetamorphic rocks of the Mawson Group comprise granite gneiss, orthopyroxene gneiss, and
crystalline schists dated at >3000 Ma combined with tectonic wedges and blocks of the variegated sequence with ultramafic
(komatiitic) rocks. The find of those rocks allows us to suggest that an ancient granite-greenstone domain existed in the
territory of the Prince Charles Mts.; this domain is retained only as tectonic wedges amongst granite gneisses of the Mawson
and Menzies groups composed of polymetamorphic terrigenous rocks with basic sills. The following sequence of metamorphic mineral
assemblages in the Menzies Group has been established: (1) And-Crd ± St, (2) Ky-St-Grt-Bt-Ms, (3) Sil-Grt-Crd. The andalusite-type
metamorphism of rocks pertaining to the Menzies Group probably has the same age as greenschist metamorphism of rocks belonging
to the Collaboration Group (2917 ± 82–2878 ± 65 Ma at Mt. Ruker). The formation of kyanite-staurolite mineral assemblage (mounts
Stinear, Maguire, Rymill; South Mawson Escarpment) might be related to a metamorphic event dated at 2400–2350 Ma. The formation
of sillimanite-garnet and sillimanite-cordierite assemblages with staurolite relics correlates in time with emplacement of
the MacColly granite 600–500 Ma ago. Polymetamorphic rocks of the Lambert Complex are migmatites and gneisses, often with
orthopyroxene relics. Blocks of ultramafic rocks are localized amongst granite gneisses. The superimposed metamorphism of
amphibolite and granulite facies took place 1800 Ma ago. The model Nd age of ultramafic rocks (2500 Ma) is treated as the
time of emplacement of magma into the rocks of the Lambert Complex. Isotopic and geochemical evidence for Early Paleozoic
granulite-facies metamorphism is known. 相似文献
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Levin B. W. Sasorova E. V. Zakupin A. S. Kamenev P. A. 《Doklady Earth Sciences》2018,483(2):1575-1578
Doklady Earth Sciences - On the basis of three methods, the current seismic situation in the zone of the Central Sakhalin Fault is assessed and the scenarios of its development are predicted. It is... 相似文献
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E. N. Kamenev V. A. Maslov V. S. Semenov R. G. Kurinin V. M. Mikhailov N. L. Alekseev I. A. Kamenev S. V. Semenov 《Geotectonics》2013,47(2):115-130
The information on the composition, structure, P-T conditions of metamorphic facies, evolution, and time of the metamorphic events in the largest Precambrian tectonic provinces of the Antarctic Crystalline Shield gained over more than a half-century is summarized in this paper. The joining up of the ortho- and paracrystalline rocks into complexes and groups according to their geographic position, composition, age, and the character of their metamorphism allowed us to consider the main features of the structure and evolution of the provinces including (1) the near-latitudinal polycyclic Late Precambrian-Early Paleozoic Wegener-Mawson Mobile Belt, extended for more than 4000 km, which started to evolve in the Mesoproterozoic and stabilized only at the end of Cambrian; (2) the Early Precambrian relict crystalline protocratonic blocks adjoining this mobile belt; their history is traced from the Eoarchean; and (3) the near-latitudinal Late Precambrian-Early Paleozoic aulacogen in the southern protocratonic block. The P-T conditions of the metamorphism from the pyroxene-granulite subfacies in the protocratonic blocks to the greenschist facies in aulacogen, as well as the age of the magmatic and metamorphic events in all the tectonic provinces of the shield, are characterized. This made it possible to consider the metamorphic history and conditions of the continental crust’s formation in Antarctica, where the oldest crystalline rocks are dated to the Eoarchean (4060–3850 Ma) and the youngest rocks are ~500 Ma old. 相似文献