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1.
N. E. Kozlov E. V. Martynov N. O. Sorokhtin A. A. Ivanov N. M. Kudryashov N. E. Kozlova 《Geochemistry International》2008,46(6):608-613
Rock associations characterized by heterogeneous sets of petrogeochemical parameters were compared by quantifying the degree of their similarity-dissimilarity and searching for discrimination trends between them. Using procedures specially developed for this purpose, it was demonstrated for the first time that the lithotectonic complexes of the Murmansk domain are fundamentally different from those of typical granulite-gneiss terrains and resemble the granite-greenstone terrains of the Baltic shield, Greenland, and Canada. Based on the whole data set, the Murmansk domain can be considered as a deeply eroded Archean granite-greenstone terrain retaining only the tonalite-trondhjemite-gneiss basement with abundant supracrustal enclaves. A trend of the compositional difference between the older and younger rock associations is similar to that between the tholeiitic and boninitic volcanic series. It was suggested that the petrogeochemical “age” trend reflects the initial stage of the compositional evolution of the metamagmatic rocks of the region from metamorphic rocks similar to tholeiites at the early stages to the Paleoproterozoic boninite-like rocks, which are believed to be linked to the unique PGE-bearing province of the northeastern Baltic shield. This implies that the specific metallogenic features of the region emerged already in the Archean, which supported the suggestion on the long duration of geological processes in the Early Precambrian. 相似文献
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Oceanology - Abstract—The paper studies carbon transformation and transfer processes in the crust and mantle. Sediments dragged into subduction zones are dewatered, broken down, and altered... 相似文献
3.
Greenhouse gases and greenhouse effect 总被引：1，自引：0，他引：1
G. V. Chilingar O. G. Sorokhtin L. Khilyuk M. V. Gorfunkel 《Environmental Geology》2009,58(6):1207-1213
Conventional theory of global warming states that heating of atmosphere occurs as a result of accumulation of CO2 and CH4 in atmosphere. The writers show that rising concentration of CO2 should result in the cooling of climate. The methane accumulation has no essential effect on the Earth’s climate. Even significant
releases of the anthropogenic carbon dioxide into the atmosphere do not change average parameters of the Earth’s heat regime
and the atmospheric greenhouse effect. Moreover, CO2 concentration increase in the atmosphere results in rising agricultural productivity and improves the conditions for reforestation.
Thus, accumulation of small additional amounts of carbon dioxide and methane in the atmosphere as a result of anthropogenic
activities has practically no effect on the Earth’s climate. 相似文献
4.
The origin of the Noril’sk and Talnakh sulfide PGE-Cu-Ni deposits that are associated with Triassic basaltic traps of Siberia
is considered. It has been shown that ore elements of these deposits (with the probable exception of iron) are of a crustal
origin rather than a mantle one. They entered the basalts owing to the remobilization (recycling) of ore elements from Early
Proterozoic sediments and rocks that are presented in the basement of the Siberian Craton. The criteria for prospecting for
analogous deposits are given. 相似文献
5.
S. L. Nikiforov L. I. Lobkovskii N. N. Dmitrevskii R. A. Ananiev N. O. Sorokhtin A. V. Khortov O. Yu. Bogdanova 《Doklady Earth Sciences》2016,466(1):75-77
Degradation of the underwater multiyear permafrost rocks (UMPR) together with intensification of thermal abrasion processes in the coasts are global risks on a planetary scale. Changes in the physical properties of sediments can occur after degradation of the UMPR and can lead to unpredictable consequences especially in the regions of technical development. Drifting ice bottom exaration (ice plucking of bottom sediments), which is increasing based on the data of recent expeditions, is no less dangerous. These processes are hazardous for practically all types of activity. 相似文献
6.
N. O. Sorokhtin L. I. Lobkovsky N. E. Kozlov N. G. Novikov S. L. Nikiforov O. Yu. Bogdanova 《Doklady Earth Sciences》2015,465(2):1229-1232
The perspectives of development of the Varanger–Timan petroleum basin are considered. The Varanger–Timan oil-and-gas basin was formed in the Riphean and Vendian on the passive continental margin of the East European Plate. Evolution of the Barents–Kara region in the Mesoproterozoic and Neoproterozoic led to a mosaic junction of the lithospheric plates having different ages and having undergone significant alterations during the Caledonian and Variscan orogenies. The spatiotemporal regularities of the interaction between geodynamic processes and conditions providing for the formation of conventional and unconventional hydrocarbon fields are described. 相似文献
7.
Nikiforov S. L. Ananiev R. A. Dmitrevskiy N. N. Sorokhtin N. O. Moroz E. A. 《Oceanology》2020,60(2):295-296
Oceanology - Abstract—The article briefly describes the results of integrated geological, geophysical, and hydrophysical studies on the shelves of the Barents and Kara seas. The research was... 相似文献
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9.
Nikiforov S. L. Ananiev R. A. Dmitrevsky N. N. Libina N. V. Sorokhtin N. O. Sukhikh E. A. Razumovskii A. A. Toropov G. A. 《Oceanology》2021,61(4):511-516
Oceanology - Sedimentary waves are represented by a series of wavelike accumulative features with various degrees of morphological expression. These morphological forms are superimposed on the... 相似文献
10.
The origin of PGE-Cu-Ni sulfide deposits of Norilsk and Talnakh located in the northwest flank of the Triassic basalt trap formation of Siberia is considered.It is shown that ore elements of these deposits (probably,except Fe) are derived from the crust rather than from the mantle.They entered the basalts owing to a remobilization (recycling) of ore elements from the Paleoproterozoic sediments and from the rocks of the Siberian platform's basement.Prospecting criteria for similar deposits are as follows:(1) a presence of a large Paleoproterozoic aulacogen and a related magmatic sulfide Cu-Ni mineralization; (2) a confinement of perspective areas to troughs associated with long-lived deep fault zones; (3) association with mobile orogenic belts,island-arc systems and tectonomagmatic activation zones; (4) temporal association with boundaries of global periods characterized by active processes of continental breakup and large-scale trap magmatism.A combination of several factors (the first one is obligatory) is favorable for the discovery of a large ore body. 相似文献