排序方式： 共有12条查询结果，搜索用时 31 毫秒
1.
Kossova S. A. Dubinina E. O. Miroshnikov A. Yu. Flint M. V. 《Doklady Earth Sciences》2019,487(1):827-830
Doklady Earth Sciences - An isotopic–geochemical study was carried out for waters of Tsivolkii and Sedov bays (southeastern coast of the Novaya Zemlya Archipelago). The waters of these bays... 相似文献
2.
Kossova S. A. Dubinina E. O. Chizhova Ju. N. Miroshnikov A. Yu. 《Doklady Earth Sciences》2020,492(2):475-479
Doklady Earth Sciences - An isotope–geochemical study was performed on the waters of Abrosimov and Stepovoi bays along the southeastern coasts of the Novaya Zemlya Archipelago. The waters... 相似文献
3.
Dubinina E. O. Miroshnikov A. Yu. Kossova S. A. Flint M. V. 《Doklady Earth Sciences》2019,484(1):109-113
Doklady Earth Sciences - Continental runoff, inflowing to Arctic waters, is estimated by the use of isotope and hydrophysical tracers. This is quite a complicated task, because desalinated waters... 相似文献
4.
E. O. Dubinina S. A. Kossova A. Yu. Miroshnikov N. M. Kokryatskaya 《Geochemistry International》2017,55(11):1022-1032
Oxygen and hydrogen isotope analysis was performed to study the processes of distribution of water masses and modification of their salinity in the Russian Arctic seas. A wealth of new isotopic data was obtained for freshwater (river runoff, Novaya Zemlya glaciers) and seawater samples collected along a set of extended 2D profiles in the Barents, Kara, and Laptev Seas. The study presents the first δD values measured for the Northeast Atlantic Deep Water NEADW dominated the water column of the Barents Sea (S = 34.90 ± 0.05, δD = +1.55 ± 0.4‰, δ18O = +0.26 ± 0.1‰, n = 44). This water mass is present in the Kara Sea and western Laptev Sea. The relationship between δD, δ18О, and salinity data was used to calculate the fractions of waters of different origin, including the fractions of continental runoff in waters of the Barents, Kara, and Laptev Seas. It was shown that the relationships between the isotopic parameters (δD, δ18О) and salinity in waters of the Kara and Laptev Seas is controlled by the intensity of continental runoff and sea ice processes. Sea ice formation is the main factor controlling the formation of the water column on the Laptev Sea shelf, whereas the surface waters of the middle Kara Sea are dominated by the contribution of river runoff. A very strong stratification in the Kara Sea is caused by the presence of a relatively fresh surface layer mostly contributed by estuarine water inputs from the Ob and Yenisei Rivers. The contribution of river waters reaches 40–60% in the surface layer in the central part of the sea and decreases to a few percent down 100 m water depth. Stratification in the western part of the Laptev Sea is controlled by the contribution of freshwater input from the Lena River and modification of salinity by sea ice formation. 相似文献
5.
Isotope parameters (δD, δ<Superscript>18</Superscript>O) and sources of freshwater input to Kara Sea
The isotope characteristics (δD, δ18О) of Kara Sea water were studied for quantitative estimation of freshwater runoff at stations located along transect from Yamal Peninsula to Blagopoluchiya Bay (Novaya Zemlya). Freshwater samples were studied for glaciers (Rose, Serp i Molot) and for Yenisei and Ob estuaries. As a whole, δD and δ18O are higher in glaciers than in river waters. isotope composition of estuarial water from Ob River is δD =–131.4 and δ18O =–17.6‰. Estuarial waters of Yenisei River are characterized by compositions close to those of Ob River (–134.4 and–17.7‰), as well as by isotopically “heavier” compositions (–120.7 and–15.8‰). Waters from studied section of Kara Sea can be product of mixing of freshwater (δD =–119.4, δ18O =–15.5) and seawater (S = 34.9, δD = +1.56, δ18O = +0.25) with a composition close to that of Barents Sea water. isotope parameters of water vary significantly with salinity in surface layer, and Kara Sea waters are desalinated along entire studied transect due to river runoff. concentration of freshwater is 5–10% in main part of water column, and <5% at a depth of >100 m. maximum contribution of freshwater (>65%) was recorded in surface layer of central part of sea. 相似文献
6.
A. V. Dubinin E. O. Dubinina S. A. Kossova E. D. Berezhnaya 《Doklady Earth Sciences》2017,475(2):877-882
Assuming stability of the Black Sea system and conservative behavior of sulfate in relation to salinity outside the bottom convective layer (BCL), the influence of shelf-modified Mediterranean water (SMMW) on the water column of the Black Sea below the core of the cold intermediate layer (CIL) was estimated on the basis of variations in the sulfur isotope composition of sulfate. As a result of construction of the model of mixing of three water masses, it was shown that the SMMW fraction in the area of hydrogen sulfide onset at a salinity of 20.8–20.9 was 5–7 times higher than the amount of water produced by mixing of the CIL and the BCL. The SMMW fraction decreased with depth rapidly and was only 10% at a depth of 1000 m. Significant supply of SMMW to the pycnocline area provided a high renewal rate of water, which prevented accumulation of 32S-rich sulfate resulted from hydrogen sulfide oxidation. 相似文献
7.
Chugaev A. V. Plotinskaya O. Yu. Dubinina E. O. Sadasyuk A. S. Gareev B. I. Kossova S. A. Batalin G. A. 《Geology of Ore Deposits》2021,63(3):173-184
Geology of Ore Deposits - The Yubileinoe large gold deposit, located at the southern end of the Magnitogorsk megazone, is the only known representative of the Au–porphyry systems in the... 相似文献
8.
9.
Oceanology - Three-year monitoring (2014–2016) of isotope parameters (δD and δ18О) of water in Sedov and Tsivolky bays (Novaya Zemlya Archipelago) freshened by water of... 相似文献