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The problems of underground water formation in the Elburgan water bearing stratum in conditions close to a marine sedimentation basin are considered in this article. As well, we consider variations in water composition under the influence of mixing with ground waters during water pumping for commercial purposes, and the deterioration of water quality caused by a decrease in the mineralization of mixture, considered with respect to the degree of mineralization accepted for waters used for medical purposes. 相似文献
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An attempt is made to find the answer to the question as to why the measures of the environmental institutions of Russia are ineffective for the avoidance and prevention of the degradation of aquatic ecosystems in placer gold mining. It is established that the size of payments to be made by companies engaged in placer gold mining are such that they almost cannot stimulate any nature conservation initiatives. Moreover, they even cannot be the argument for observance of environmental legislation. It is shown that the high transaction costs borne by the State, with minor expenditures of nature resource users connected with the protection of environmental natural systems fail to achieve the objectives imposed upon the supervising institutions. It is established that local authorities are directly interested in increasing placer gold mining as well as in gaining the loyalty of artels implying registration of the enterprise in this region, because these tax proceeds are exceptionally important for municipal formations facing a chronic financial deficit, a budgetary uncertainty and a dependence on regional and federal subsidies and transfers. Finance flows were calculated and analyzed to show that a very important problem for Russia’s eastern regions that involves reconciling the economic and ecological interests in placer gold mining is not resolved through “cosmetic changes” in organs of state supervision. It is concluded that there is a need for new institutional solutions in order to create and increase incentives for users of mineral resources and local authorities for observance of environmental regulations, the preservation and restoration of disturbed ecosystems, and for the ecologization of production processes. 相似文献
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A. G. Vladimirov A. E. Izokh G. V. Polyakov G. A. Babin A. S. Mekhonoshin N. N. Kruk V. V. Khlestov S. V. Khromykh A. V. Travin D. S. Yudin R. A. Shelepaev I. V. Karmysheva E. I. Mikheev 《Petrology》2013,21(2):158-180
One of the problems faced by researchers when paleogeodynamic reconstructions are carried out for deeply eroded orogenic terranes is the limited usage of geological and isotopic geochemical data on volcanic associations. The utilization of information on gabbroids and granitoids considered separately also fails to resolve this problem. The convergence of features of arc, collisional, and within-plate magmatic processes leads the researcher to search for indicator plutonic associations, such as paired gabbrogranite intrusive series. The latter were distinguished using geoinformation databases (including those compiled by the authors of this paper), which were composed for the Early Caledonides in the Altai-Sayan folded area and adjacent territories. This makes it possible to characterize mantle-crustal magmatism in suprasubductional and collisional environments and the conditions under which these geodynamic regimes (plate- and plume-tectonic factors) interact. This paper presents estimates of the composition of the parental basic magmas, distinctive features of their differentiation, and the compositional specifics of the accompanying extensive granite-forming processes. The example of the Altai-Sayan folded area and adjacent territories is employed to correlate the composition of the basic-ultrabasic and granitoid magmas and, on this basis, distinguish (a) differentiated gabbro-tonalite-plagiogranite intrusive series corresponding to accretionary-collisional geodynamic environments, and (b) gabbro-monzonite-granosyenite-potassic granite intrusive series, which were produced when the accretionary-collisional system was affected by a plume. 相似文献
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Vladimirov A. G. Travin A. V. Anh Phan Luu Murzintsev N. G. Mikheev E. I. 《Doklady Earth Sciences》2019,488(2):1231-1239
Doklady Earth Sciences - Based on reconstruction of the thermal evolution of the Song-Chai gneiss–granite massif (Northern Vietnam), the long-term occurrence of granitoid magma at deep levels... 相似文献
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E. I. Mikheev A. G. Vladimirov V. S. Fedorovsky T. B. Bayanova A. M. Mazukabzov A. V. Travin N. I. Volkova S. V. Khromykh V. V. Khlestov P. A. Tishin 《Doklady Earth Sciences》2017,472(2):152-158
The western Baikal region (Ol’khon region, Nutgei zone, Kharikta area) is characterized by the development of packets of thrust-type folds and synkinematic granites corresponding to the stage of thrust deformations (overthrust-type granites). Two stages in the formation of thrust-type folds separated by episodes of granite emplacement are definable. The data obtained make it possible to estimate both the time of transition from thrust to strike-slip deformations and the duration of accretionary?collisional events that resulted in regional strike-slip deformations, which terminated in the western Baikal region 460?455 Ma ago. 相似文献
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A.S. Mekhonoshin A.G. Vladimirov V.G. Vladimirov N.I. Volkova T.B. Kolotilina E.I. Mikheev A.V. Travin D.S. Yudin V.V. Khlestov S.V. Khromykh 《Russian Geology and Geophysics》2013,54(10):1219-1235
Early Caledonides in the Olkhon region of western Cisbaikalia, being part of the folded framing of the Siberian craton, are a unique geologic object for studying processes of mantle–crust interaction at deep levels of the Earth’s crust. This paper describes restitic ultramafic bodies and boudins spatially confined to faults (blastomylonite sutures), as well as synkinematic granites related to amphibolite facies of metamorphism. Estimates are given for the PT-conditions of metamorphic rocks from the folded framing of the ultramafic bodies, the chemical and mineral compositions of ultramafic rocks, blastomylonites and synkinematic granites, and the results of U–Pb and Ar–Ar isotopic dating. Particular attention is paid to the thermal history of tectonic exposure of the ultramafic bodies as relics of the paleo-oceanic crust in the Early Caledonian collisional system of western Cisbaikalia. 相似文献
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The sterile neutrino mechanisms for pulsar natal kicks are reanalyzed. The necessary strength of the magnetic field generated in a supernova explosion is shown to have been underestimated significantly in previous works. An alternative mechanism for pulsar natal kicks involving only standard neutrinos in which the outgoing neutrino flux in a supernova explosionwith the generation of a strong toroidal magnetic field leads to a magnetic field redistribution in the ??upper?? and ??lower?? hemispheres of the supernova envelope is discussed. The emerging magnetic field pressure asymmetry can produce a pulsar natal kick. 相似文献
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Criteria are formulated for determining the critical points and bifurcation points of rotating, magnetized, newtonian polytropes,
which coincide in the absence of a magnetic field. The magnitude of the shift in these points is estimated in terms of the
flatness parameter e and rotation speed ε. The dependence of the total energy of a polytrope near the bifurcation and critical
points is calculated as a function of the asymmetry parameters X for the distribution of mass relative to the axis of rotation
and of the rotation speed ε for ε ≪ 1. The stability of the rotating polytrope with respect to the parameter X is analyzed.
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Translated from Astrofizika, Vol. 51, No. 2, pp. 321–327 (May 2008). 相似文献