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S. P. Pletnev M. V. Cherepanova E. D. Ivanova I. V. Utkin Ya. V. Kuz’min G. S. Burr 《Stratigraphy and Geological Correlation》2010,18(4):450-463
The diversified analysis (data on radiocarbon ages, diatoms, planktonic and benthic foraminifers) of sediments from the central
part of the Sea of Okhotsk (core from a depth of 1186 m) made it possible to define five sedimentary units corresponding to
five marine oxygen-isotope stages MIS 5-MIS 1 (the last 120 ka) and provide their thorough paleontological characteristic,
using different microfossil groups. Microfossil assemblages demonstrate variations in their abundance, distribution of individual
species, and representatives of different ecological groups through the section. 相似文献
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A. V. Lozhkin P. M. Anderson N. A. Goryachev P. S. Minyuk A. Yu. Pakhomov T. B. Solomatkina M. V. Cherepanova 《Doklady Earth Sciences》2010,430(2):198-200
Investigation of Pernatoe Lake sediments in the south of Paramushir Island has enabled us to obtain the first continuous pollen
record of climate and vegetation changes in the north of the Kurile archipelago during the Holocene. Series of radiocarbon
datings of between 10 000 ± 40 and 2180 ± 40 years ago are evidence that the beginning of sediments accumulation, found after
borehole development, is related to the Early Holocene. Diatom analysis has shown several stages in the lake development:
raised bog on the border of the Pleistocene and Holocene, lagoon formation resulting from the sea level rise over 9–6 ky,
and freshwater lake formation 6 ky and up to the present. Climate warming during the period attributed to the boreal and Atlantic
periods of the Holocene is reflected by the dominance of Pinus pumila and Alnus serrulata assemblages in vegetation cover. Wide dune fields were formed in the Sea of Okhotsk and the Pacific shores of Paramushir
Island 5–4 ky. Strengthening of atmogenic processes is related to cooling of the climate and drying of some areas of the underwater
slope. 相似文献
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V. K. Cherepanova A. N. Cherepanov V. N. Sharapov S. I. Plaksin 《Geochemistry International》2009,47(5):454-462
A problem on the directional crystallization of melt was solved taking into account heat and mass exchange between the two-phase zone and the cooling volume of a magmatic body. Conditions were determined for the development of rhythmic crystallization by the example of the solidification of the pseudobinary Di-An system. 相似文献
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V. B. Spektor V. V. Spektor N. T. Bakulina N. V. Torgovkin A. M. Cherepanova G. T. Maksimov L. G. Neradovskii 《Doklady Earth Sciences》2016,467(1):232-235
An inlier of Jurassic rocks is identified for the first time at the surface of the first terrace above a floodplain composed of Holocene sediments on the left side of the Lena River. It represents a block of Jurassic rocks similar compositionally to rocks in outcrops on the left slope of the river valley. It is shown that the block was displaced along faults in the Holocene. The rocks of the inlier are deformed, and the Paleogene–Neogene sequence covering the plateau (altitude approximately 200 m) is displaced in the stepwise mode to the level corresponding to the bottom of the Lena River valley (altitude approximately 100 m). The Holocene alluvium enveloping the inlier belongs to the constratal type being up to 40 m thick. Steep faceted morphostructures on the left slope of the Lena River valley coincide with the faults. The left slope of the valley is crossed exclusively by young incisions. It is assumed that Holocene movements may be reactivated in the future. 相似文献
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Voronova O. S. Zima A. L. Kladov V. L. Cherepanova E. V. 《Izvestiya Atmospheric and Oceanic Physics》2020,56(9):1042-1052
Izvestiya, Atmospheric and Oceanic Physics - The results of satellite wildfire monitoring and estimates for the amounts of emissions of harmful gases and fine aerosols in Siberia from 2001 to 2019... 相似文献
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A. V. Volkov N. V. Cherepanova V. Yu. Prokof’ev N. E. Savva S. V. Smil’gin N. V. Trubkin V. Yu. Alekseev 《Geology of Ore Deposits》2013,55(3):185-206
The Butarny gold deposit is situated in the central part of the Khurchan-Orotukan Zone of tectonomagmatic activation, which is traced for 150 km in the near-meridional direction, and localized in the slightly eroded Late Jurassic granitoid stock of the same name. The explored orebodies are quartz veins and pinnate veinlets with low-grade pocket-disseminated sulfide (mainly arsenopyrite) mineralization containing native gold. The Bi-bearing gold-pyrite-arsenopyrite and the quartz-löllingite-arsenopyrite-stibnitejamesonite stages of the veined low-sulfide ore formation have been distinguished. The main mineral assemblage consists of arsenopyrite, native gold, and native bismuth. The minerals-carriers of gold were deposited during the final stage of ore-bearing quartz crystallization at 334?245°C from low-concentrated pneumatolytic-hydrothermal carbonated fluid containing CO2 and CH4 (5.8?2.2 and 1.6?0.5 mol/kg of solution, respectively). The ore-bearing fluid had variable salinity (5.3?2.2 wt % NaCl equiv). It is quite probable that the gas-saturated fluid participated in transport and precipitation of ore matter. Its density varies from 1.02 to 0.77 g/cm3. The pressure is estimated at 1600 to 780 bar. The fluid regime of ore formation at the Butarny deposit is similar to that of typical intrusion-related gold deposits. The Au tenor of beresitized granodiorite, numerous quartz veinlets, and extensive Au-bearing weathering mantle allow us to suggest stockwork mineralization. 相似文献
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V. N. Sharapov G. V. Kuznetsov V. P. Logachev V. K. Cherepanova A. N. Cherepanov 《Geochemistry International》2017,55(3):231-250
A quantitative analysis of sublimation of intensely fractured rocks in the mantle wedge was performed using a model of planar fracture channel. The use of dimensionless variables allowed us to analyze the influence of the Nusselt and Sherwood criteria on temperature and variation of the rates of dissolution of minerals and films on fracture walls and estimate both linear and mass sublimation rates. The results of this study predict relatively high rates of major element dissolution and remobilization by flows of magmatic and metamorphic gases over wide temperature range. Physical modeling of this process using natural mantle rock samples confirms the plausibility of the proposed model at least for the case of metamorphic-driven remobilization of elements from gas-liquid inclusions in metasomatized ultramafic rocks. This model provides a satisfactory explanation for the observed local heterophase alterations within ultramafic rocks that have experienced multistage deformation beneath volcanoes of the Kamchatka volcanic front. 相似文献