共查询到20条相似文献，搜索用时 578 毫秒
1.
Rare Earth Elements in the Bottom Sediments of the East Arctic Seas of Russia as Indicators of Terrigenous Input 总被引：1，自引：0，他引：1
A. S. Astakhov I. P. Semiletov V. V. Sattarova Xuefa Shi Limin Hu K. I. Aksentov Yu. P. Vasilenko M. V. Ivanov 《Doklady Earth Sciences》2018,482(2):1324-1327
The REE distribution was studied in the bottom sediments of the East Arctic shelf of Russia. It is established that sediments of the Laptev and western East Siberian seas are significantly enriched in REEs, the contents of which are much higher than those of other near-continental basins. The main REE sources are runoff of the Lena River, the basin of which comprises ancient crystalline shields and magmatic rocks enriched in LREEs with significant contribution from the coastal erosion of the ice complex from the Laptev Sea and western East Siberian Sea. The terrigenous flux with a specific REE composition is supplied to the Chukchi Sea through the Bering Strait. 相似文献
2.
S. P. Pugach I. I. Pipko I. P. Semiletov V. I. Sergienko 《Doklady Earth Sciences》2015,465(2):1293-1296
This work is based on the results of a cruise of the R/V Akademik Lavrent’ev in September 2011 in the Laptev and East Siberian seas. The optical characteristics of one of the most characteristic components of the river runoff colored dissolved organic matter (CDOM), which intensely absorbs solar radiation in the short-wave spectrum range are analyzed. On the basis of experimental data, the possibility to use spectral characteristic not only for quantitative estimations but also for determination of the DOM composition in the waters of the East Siberian shelf is shown. 相似文献
3.
4.
F. P. Mitrofanov T. B. Bayanova A. U. Korchagin N. Yu. Groshev K. N. Malitch D. V. Zhirov A. F. Mitrofanov 《Geology of Ore Deposits》2013,55(5):305-319
This paper compares the geological, geophysical, and isotopic geochemical data on the Paleoproterozoic East Scandinavian Pd-Pt province in the Baltic Shield and the Late Paleozoic Noril’sk Pd-Pt province in the Siberian Craton. Both provinces contain large magmatic PGE deposits: low-sulfide in the Baltic Shield and high-sulfide in the Siberian Craton. Multidisciplinary evidence shows that the East Scandinavian mafic large igneous province, which has a plume nature, is intracratonic and was not subjected to the crucial effect of subduction-related and other contamination processes, whereas the Noril’sk province is pericratonic with substantial crustal contamination of the intrusive processes. Low-sulfide Pd-Pt deposits dominate in the East Scandinavian province, while high-sulfide Ni-Cu-PGE deposits play the leading role in the Noril’sk province. The U-Pb, Sm-Nd, and Rb-Sr isotopic data indicate multistage and long-term (tens of millions of years) geological history of mafic large igneous provinces. The plume magmatism with specific geochemistry and metallogeny is probably related to lower mantle sources. 相似文献
5.
E. V. Shipilov 《Doklady Earth Sciences》2011,436(2):181-185
Analysis of the geology of the islands and interpretation of seismic sections of the western part of the East Siberian Sea
shelf revealed two types of basaltic magmatism. The Cretaceous fissure volcanism mostly developed in the Anzhu trough. The
south wall of the New Siberian basin contains a cone-shaped paleoedifice, which is evidence of the formation of the central
type volcanoes. 相似文献
6.
Lithology and Mineral Resources - Oil- and gas-bearing reefs are widespread in the Paleozoic of ancient (North American, East European, and Siberian) platforms. Two main types of reefs have been... 相似文献
7.
E. B. Sal’nikova A. M. Larin S. Z. Yakovleva A. B. Kotov V. A. Glebovitskii A. V. Tkachev I. V. Anisimova Yu. V. Plotkina B. M. Gorokhovskii 《Doklady Earth Sciences》2011,441(1):1479-1483
The U-Pb age of the manganotantalite from rare-metal pegmatites of the Vishnyakovskoe deposit (East Sayan Belt) has been assessed
at 1838 ± 3 Ma. The acquired data indicate the pegmatites of this deposit and associated granites of the Sayan complex belong
to the postcollision South Siberian igneous belt (1.88–1.84 Ga), which stretches along the southwestern frame of the Siberian
Craton by more than 2500 km, from the Yenisei Ridge to the Aldan Shield. Formation of this igneous belt is related to joining
(starting from about 1.9 Ga BP) of the series of continental microplates and island arcs to the Siberian Craton; this led
to final stabilization of the craton at about 1.8 Ga BP. 相似文献
8.
O. V. Dudarev A. N. Charkin N. N. Dmitrevskiy R. A. Anan’ev A. A. Meluzov A. G. Roslyakov V. I. Sergienko L. I. Lobkovsky N. E. Shakhova I. P. Semiletov 《Doklady Earth Sciences》2014,457(1):873-876
The problem of the current state of subaerial morphosculptures on the periglacial East Siberian Shelf is still debatable due to the lack of in situ data. Therefore, any new information contributes to the knowledge of the evolution of the Arctic environment. In view of this, a complex of interdisciplinary oceanological studies was carried out in the southeastern part of the Laptev Sea. Using a side-scan sonar, images of the bottom surface were made, which show the shape of low-center-polygonal relief of the part of the modern coastal lowland area in the coastal zone near the area under study. Possible factors controlling the state of this morphosculpture within the East Siberian Shelf area of interest are considered. 相似文献
9.
R. Helle 《GeoJournal》1977,1(3):55-60
Conclusions Transport via the Siberian railway in trade between West Europe and Japan is clearly advantageous compared with sea transport. Whether the Siberian transport route is productive for the Soviet Union measured by Western standards is difficult to say. Some Western experts at least have expressed their doubts.It is known that some industrial western market-economy countries have been asked to invest in the construction of the Baikal-Amur railway in return for promised supplies of earth gas and oil. The development of the Siberian transit transport route may also be taken as a sign of an opening up of the Soviet Union to Western countries in a wider sense, and her growing interest in forming trade relations with the West.From the start the Siberian transit transport route was intended, in addition to the Soviet's own transport needs, for goods traffic between West Europe and Japan. Since then connections have been made with Hong Kong and the Philippines. In the future connections via Siberia may be made with Taiwan, South Korea and other East Asian countries and Australia. Thus the international significance of the Trans-Siberian railway in trade between the Far East and Europe will increase considerably. This will mean that the Soviet officials will be faced with what may prove a difficult decision concerning the growing demands of international transit traffic in relation to the increasing domestic transport on the same rail network.It seems likely that the Soviet Union will obtain an increasing proportion of the foreign exchange she needs from this growth in transport. In 1975 this sum was estimated at US $ 150.000.000. With the development in traffic the Soviets are also obtaining and developing new technological know-how. The biggest losers are the shipping lines belonging to the Far-Eastern Freight Conference. They are mainly from Western countries, but there are also members from Poland and East Germany who will lose freights to the Siberian transport route. 相似文献
10.
A. M. Nikishin K. O. Sobornov A. V. Prokopiev S. V. Frolov 《Moscow University Geology Bulletin》2010,65(1):1-16
This paper presents characteristics of the structural regions surrounding the Siberian Platform and discusses the Vendian-present
time evolution of the Siberian Paleocontinent with the Siberian Craton making up its nucleus. It shows that the paleocontinent
underwent significant intraplate compressional deformations with vertical movements and formation of inversion structural
features within broad areas. Such epochs of deformation took place at the Riphean-Vendian time boundary, during the Late Paleozoic,
Late Triassic, Early Cretaceous, and during the Late Cenozoic. The principal rifting events took place during the Middle-Late
Devonian. The paper presents paleotectonic reconstructions of East Siberia at several key time intervals. 相似文献
11.
《International Geology Review》2012,54(8):921-929
Acritarch assemblages at the Cambrian-Precambrian boundary correlate the Siberian Tommotian deposits with the East European Lontova horizon, and the Nemakit-Daldyn horizon with Vendian deposits in Malyy Karatau. 相似文献
12.
Yatsuk A. V. Gresov A. I. Sergienko V. I. Vasilenko Yu. P. Shvalov D. A 《Doklady Earth Sciences》2021,501(2):1081-1086
Doklady Earth Sciences - This paper reports new data on the composition of hydrocarbon gases in bottom sediments of the Laptev–East Siberian marginal shelf transition zone, the continental... 相似文献
13.
Gresov A. I. Sergienko V. I. Yatsuk A. V. Zarubina N. V. Kalinchuk V. V 《Doklady Earth Sciences》2020,492(1):382-386
Doklady Earth Sciences - New data on the gas and chemical composition of bottom sediments of the marginal-shelf part of the East Siberian Sea, continental slope, and Podvodnikov Basin of the Arctic... 相似文献
14.
《International Geology Review》2012,54(4):451-457
The area of Eurasia and the shelves of the marginal and internal seas have been sufficiently investigated by geological, geophysical, and drilling means to formulate a number of regional conclusions about the association between various types of tectonic structures and distribution of the petroliferous provinces (basins). This problem has been considered against the background of platforms of different age, the ancient pre-Riphean (East European and Siberian) and the epi-Paleozoic types (West Siberian and West European, and also the South Caspian intrageosynclinal basin). There are significant differences in their geological evolution, which exerted a direct effect on the distribution of the petroliferous complexes. Within the Siberian Platform, the fundamental stages in downwarping were associated with the deposition of Vendian and lower Paleozoic sediments. The principal stages in the formation of the sedimentary cover of the East European Platform were associated with the Devonian, Carboniferous, and Permian periods. For all types of structural zones under consideration, an association has heen established between distribution of oil and gas reserves and episodes of development of major structural elements. They define the overall stratigraphic range of the petroleum occurrences within the young and old platform and the fold regions, and also the concentration of the reserves of hydrocarbons in the complexes corresponding to the principal stages of downwarping of the basins.—Authors 相似文献
15.
M. A. Bogdasarov 《Geology of Ore Deposits》2007,49(7):630-637
The investigation is focused on identification and origin of fossil resins from the Cretaceous, Tertiary, and Quaternary sediments of Northern Eurasia on the basis of detailed study of their physical and chemical characteristics: morphology; size; mass; density; optical, mechanical, and thermal properties; chemical composition; etc. The composition of amorphous organic minerals with polymeric structure, fossil resins included, is studied with IR spectrometry, the EPR method, derivatography at low heating rates, XRD, chemical analysis, emission spectrometry, etc. The results of investigation summarized for the Baltic-Dnieper, North Siberian, and Far East amber-bearing provinces show some similarity of fossil resins in combination with specific features inherent to each province. Resins from the Baltic-Dnieper province should be termed as amber (succinite). Their variety is the most characteristic of Northern and Eastern Europe. Amber-like fossil resins from the North Siberian and Far East provinces are irrelevant to succinite. They usually occur as brittle resins, namely, retinite and gedanite, without jewelry value. Viscous fossil resin rumänite with an expected high economic value occurs in the Far East, on the shore of Sakhalin Island. 相似文献
16.
Nikishin A. M. Startseva K. F. Verzhbitsky V. E. Cloetingh S. Malyshev N. A. Petrov E. I. Posamentier H. Freiman S. I. Lineva M. D. Zhukov N. N. 《Geotectonics》2019,53(6):635-657
Geotectonics - The seismic stratigraphy scheme for the shelf basins of the East Siberian Sea and the Chukchi Sea region and the adjacent deepwater area of the Amerasia basin has been developed, and... 相似文献
17.
Doklady Earth Sciences - The junction zone between Lomonosov submarine ridge and the shelf of the East Siberian Sea was studied. The aim was to prove the absence of a strike-slip fault in the... 相似文献
18.
Doklady Earth Sciences - For the first time, the interpretation of the upper part of the sections of common depth point seismic survey of JSC MAGE in the north-western area of the East Siberian Sea... 相似文献
19.
Doklady Earth Sciences - The spatial variability of primary production in the East Siberian Sea over a large-scale aquatic area was characterized for the first time by the data of cruise 69 of R/V... 相似文献
20.
Lyn Gualtieri Sergey Vartanyan Julie Brigham-Grette Patricia M. Anderson 《Quaternary Research》2003,59(3):399-410
Two previously undocumented Pleistocene marine transgressions on Wrangel Island, northeastern Siberia, question the presence of an East Siberian or Beringian ice sheet during the last glacial maximum (LGM). The Tundrovayan Transgression (459,000–780,000 yr B.P.) is represented by raised marine deposits and landforms 15–41 m asl located up to 18 km inland. The presence of high sea level 64,000–73,000 yr ago (the Krasny Flagian Transgression) is preserved in deposits and landforms 4–7 m asl in the Krasny Flag valley. These deposits and landforms were mapped, dated, and described using amino acid geochronology, radiocarbon, optically stimulated luminescence, electron spin resonance, oxygen isotopes, micropaleontology, paleomagnetism, and grain sizes. The marine deposits are eustatic and not isostatic in origin. All marine deposits on Wrangel Island predate the LGM, indicating that neither Wrangel Island nor the East Siberian or Chukchi Seas experienced extensive glaciation over the last 64,000 yr. 相似文献