Polar Ring Currents on the sun During a Polar Magnetic Field Reversal     

Makarov  V.I.  Filippov  B.P. 《Solar physics》2003,214(1):55-63

We have studied the variations of the height of polar crown prominences according to daily observations of the Sun at the Kodaikanal Observatory (India) during 1905–1975. Polar ring filaments at latitudes 60°–80° are related to the polar magnetic field reversal. A double decrease of the height of polar ring filaments was found in the course of their migration from 40°to the poles. We estimated the limiting height of the equilibrium of polar ring filaments from the stability condition of a strong electric current. We found that the transition from large-scale to small-scale ring filaments reduces the critical height of the stability for the prominences. A model of an inverse-polarity filament was used.  相似文献   

The Bashkirian mega-anticlinorium as a petroleum basin destruction zone     

V. A. Filippov 《Doklady Earth Sciences》2008,423(1):1212-1215

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First finds of Late Tithonian and middle-late Albian radiolarian assemblages in volcanogenic-siliceous rocks of the Amur River right lower reaches and their tectonic significance     

A. N. Filippov  I. V. Kemkin 《Russian Journal of Pacific Geology》2008,2(5):412-421

The lithological-stratigraphic study of volcanogenic-siliceous rocks developed on the left side of the Machtovaya River, a right tributary of the Amur River, yielded the first radiolarian assemblages of the late Late Tithonian, the late Late Tithonian-early Valanginian, and the middle-late Albian age. It is established that the stratigraphic succession of volcanogenic-siliceous rocks in this area is composed of upper Tithonian-Valanginian dark red to red-brown cherts with basalts in the lower part of the section and Albian dark gray clayey cherts, olive-gray siliceous-tuffaceous argillites, and tufaceous siltstones in its upper part. The replacement of cherts by their clayey varieties likely occurred in the Aptian. The composition, structure, and age of these strata and the rocks constituting the Kiselevka-Manoma accretionary complex are different, which indicates their different tectonic origin.  相似文献   

Inclusions of zircon-based solid solutions in diamonds     

V. I. Silaev  V. A. Petrovsky  A. E. Sukharev  V. N. Filippov 《Doklady Earth Sciences》2006,411(8):1318-1323

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New data on the structure of the Khabarovsk Terrane of the Jurassic accretionary prism (Sikhote-Alin)     

I. V. Kemkin  A. N. Filippov  A. I. Khanchuk 《Doklady Earth Sciences》2006,406(1):28-31

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The magnetic-field geometry in polar ray structures of the solar corona     

B. P. Filippov  Yu. V. Platov  A. Ajabshirizadeh  D. V. Klepikov 《Astronomy Reports》2004,48(9):781-786

Variations in the positions of the intersection points of tangents to ray structures in the polar corona of the Sun during the solar cycle are considered. At first glance, the decrease in the distance q between the tangent intersection point and the center of the solar disk during activity maximum contradicts harmonic analyses that indicate that the relative weight of higher harmonics in the global field increases during this period. Indeed, the higher the harmonic number in an axisymmetric field, the closer the intersection point of the field-line tangents (the magnetic focus) to the solar surface. It is shown that q for a field composed of two harmonics with opposite polarities at the poles can be smaller than q for either of them taken alone. A simple model representing the global field using the third and seventh harmonics is analyzed; this model can reproduce quite satisfactorily the observed dynamics of magnetic foci of the polar field.  相似文献   

Macrozoobenthos in the inshore zone of the Northern Aral Sea     

A. A. Filippov 《International Journal of Salt Lake Research》1996,5(4):315-327

The macrozoobenthos was investigated at eight sites in the Aral Sea inshore zone and in the lower reaches of the Syrdaria river. In the sea, the benthos comprised bivalve molluscsSyndosmya segmentum Recluz andCerastoderma isthmicum Issel, gastropods fromCaspiohydrobia Starob., the polychaeteNereis diversicolor O.F. Müller and the crabRhithropanopeus harrisii tridentatus (Maitland). In the Syrdaria, MysidaeParamysis lacustris (Czern.) and GammaridaeDikerogammarus aralensis (Uljanin) were found. These taxa have not been recorded from the Sea since the 1970s. The total zoobenthos biomass and density varied between the investigated Sea areas from 92 to 582 g/m² and from 1,600 to 39,000 ind./m², respectively. Spatial and temporal salinity changes within the range 20–41 g/L did not affect macrozoobenthos composition and structure. The conclusion is that the benthic ecosystem of the Aral Sea was in a state of comparative stability from the middle of the 1980s to the middle of the 1990s. Analysis of the zoobenthos in the inshore zone is proposed as a convenient and accessible method for monitoring the status of the zoobenthos of the entire Aral Sea.  相似文献   

Higher anthraxolites     

M. M. Filippov  N. K. Cherevko  E. A. Golubev 《Geology of Ore Deposits》2007,49(7):624-629

Recent years have been marked by progress in studying the structure of natural X-ray amorphous substances, anthraxolites included, by scanning electron and atomic power microscopy. Integration of the available data on molecular and supramolecular structure of higher anthraxolites from Karelia, Novaya Zemlya, and the Urals allowed elaboration of new classification criteria for solid bitumen, namely, degree of structure perfection and micromineral composition. This approach will help to eliminate disadvantages of traditional investigation of solid bitumen.  相似文献   

Crossing Filaments     

Boris Filippov  A. K. Srivastava 《Solar physics》2011,270(1):151-164

Solar filaments show the position of large-scale polarity-inversion lines and are used for the reconstruction of large-scale solar magnetic field structure on the basis of Hα synoptic charts for the periods that magnetographic measurements are not available. Sometimes crossing filaments are seen in Hα filtergrams. We analyze daily Hα filtergrams from the archive of Big Bear Solar Observatory for the period of 1999 – 2003 to find crossing and interacting filaments. A number of examples are presented and filament patterns are compared with photospheric magnetic field distributions. We have found that all crossing filaments reveal quadrupolar magnetic configurations of the photospheric field and presume the presence of null points in the corona.  相似文献   

New potentially industrial sulfide indium-manganese ore type     

Kokin  A. V.  Silaev  V. I.  Kiseleva  D. V.  Filippov  V. N. 《Doklady Earth Sciences》2010,430(1):108-113

Doklady Earth Sciences -  相似文献