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Wyświetlanie 1-5 z 5
Tytuł:
The sulphur and oxygen isotopic composition of Lower Cambrian anhydrites in East Siberia
Autorzy:
Peryt, T. M.
Hałas, S.
Kovalevych, V. M.
Petrychenko, O. Y.
Dzhinoridze, N. M.
Powiązania:
https://bibliotekanauki.pl/articles/2058955.pdf
Data publikacji:
2005
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Siberia
Lower Cambrian
evaporites
sulphur isotopes
oxygen isotopes
Opis:
Published sulphur and oxygen isotope age curves for the late Neoproterozoic-Early Cambrian time interval have been based on studies of sulphate intervals of the East Siberian salt giant. We report here on sulphur and oxygen measurements for sulphate dispersed in, or forming laminae in, the rock salt deposits in all Lower Cambrian basins of East Siberia. Sulphur isotope data for 26 samples of Lower Cambrian anhydrites from East Siberia range from +22.6 to +34.5‰. No difference was observed between different suites and between samples taken from anhydrite intercalations in rock salt and from water-insoluble residue in rock salt. Oxygen isotope data for 25 anhydrite samples range from +12.4 to +17.8‰, and thus δ18 O values have a smaller range of variation (5.5‰) than δ34 S (11.8‰) over the entire set of Lower Cambrian anhydrites. The great δ34 S variability observed in the Lower Cambrian of Siberia seems to reflect mixing of sulphates coming from the ocean and due to the riverine input. The lowest δ18 O values may indicate the input values from both the sources, whilst the highest value may result from isotope exchange between SO4 2- and water. Our results combined with data provided by previous workers could indicate a clear stratigraphic trend in δ34 S values, with a remarkable fall of ca. 9‰ in δ34 S value during the earliest Cambrian and then a slight rise in δ34 S values in the younger part of Early Cambrian. However, if only the highest values are taken, the measured values are compatible with seawater δ34 S 3 30‰ during the entire Early Cambrian. Sulphur isotopic composition of sulphate minerals did not be come heavier from the sulphate stage to ward the chloride stage.
Źródło:
Geological Quarterly; 2005, 49, 2; 235--242
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The foraminiferal assemblages of the uppermost Kimmeridgian-Volgian succession of Western Siberia and their correlation potential 157 INTRODUCTION During the last few decades, the stratigraphy of the uppermost Jurassic-lowermost Cretaceous (scope, sequen
Autorzy:
Podobina, V.
Gabysheva, E.
Tatyanin, G.
Powiązania:
https://bibliotekanauki.pl/articles/2061369.pdf
Data publikacji:
2009
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Western Siberia
Upper Jurassic
Volgian
marine deposits
biostratigraphy
correlation
foraminifera
Opis:
The present study summarizes the data on the continuous stratigraphic sequence of foraminiferal assemblages from the Volgian deposits of the south-east of Western Siberia. Microfaunal analyses of 650 core samples from 18 boreholes of Volgian deposits were performed. Eighty two foraminiferal species, identified from the samples, were combined into the Volgian assemblages. On the basis of these assemblages, four biostratigraphic units were established in the range of foraminiferal zones and foraminiferal beds with characteristic species. These biostratigraphic units correspond to the upper part of the Kimmeridgian/ lower part of the Volgian, the Middle Volgian (lowermost and uppermost beds), and the Upper Volgian. A detailed biostratigraphic analysis of the Volgian beds was carried out, which enabled a correlation scheme to be developed for major regions of Russia. West-Siberian foraminiferal assemblages were correlated with those of Europe and North America within the Panboreal Superrealm. The species composition of foraminiferal assemblages was analyzed, and correlatable species ere established. This provided an opportunity to correlate coeval strata from Western Siberia, East European (Russian) Platform, northern territories of Siberia and Arctic Islands, Canada, Spitsbergen and England. The possibility was established for correlating Volgian-Tithonian deposits of the Panboreal and Tethys-Panthalassa Superrealms through the Dnieper-Donets Basin where faunas of both southern and Boreal-Arctic types are met.
Źródło:
Volumina Jurassica; 2009, 7, 1; 157-172
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Landsat mapping of ice-marginal features on the Taymyr Peninsula, Siberia - image interpretation versus geological reality
Autorzy:
Alexanderson, J.H.
Powiązania:
https://bibliotekanauki.pl/articles/2059388.pdf
Data publikacji:
2000
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Siberia
Taymyr
landsat
Multispectral Scanner (MSS)
glacial geology
ice-margin
Opis:
To solve the question concerning the age and extent of the latest glaciation in northern Eurasia, several geological investigations were carried out. This paper describes work done on the North Taymyr ice-marginal complex on the Taymyr Peninsula in north central Siberia. The initial remote sensing work aimed to survey fieldwork localities and to acquire a regional geological overview. A Landsat 5 Multispectral Scanner (MSS) image was interpreted, both visually and by computer-based techniques. The ice-marginal zone is clearly visible on the satellite image and it was possible to distinguish spectrally different ground-types. In total, seven ground-types have been discerned and they are described and discussed. A geological interpretation of them was made after combining the initial results with the information gained from ground-truthing, which included sedimentological and morphological fieldwork. It is necessary to take topography and associations of classes into consideration when interpreting the final map, since the identification of some ground-types is not univocal.
Źródło:
Geological Quarterly; 2000, 44, 1; 15-25
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polska polityka surowcowa za granicą
Polish raw materials policy abroad
Autorzy:
Maksymowicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/2075790.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Afryka
ekspansja
surowce mineralne
Syberia
wiedza
Africa
expansion
mineral resources
Siberia
knowledge
Opis:
The Polish expansion in mineral exploration is going to start with Africa. This is expressed in Government documents. Such direction is obviously welcome, but is not the most important. Chinese competitiveness in that continent is insurmountable. The Polish science was most successful in this field in the 19th and early 20th centuries in Siberia. Its achievements have been appreciated there until today, independently of political turmoil in Polish-Russian relations. This direction of the policy in mineral exploration is the most promising because this is where the world economy and policies are currently targeted. A weakness of both these options is the lack of commonly available knowledge about both Africa and Siberia, and about other areas of our interests in raw materials around the world. This should be a starting point to a debate about the Polish policy in mineral exploration abroad.
Źródło:
Przegląd Geologiczny; 2017, 65, 2; 87--88
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wkład geologów polskich w odkrycia złóż surowców mineralnych Syberii i Dalekiego Wschodu
Contribution of Polish geologists to the discoveries of mineral deposits in Siberia and the Far East
Autorzy:
Graniczny, M.
Wołkowicz, K.
Urban, H.
Wołkowicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/2085884.pdf
Data publikacji:
2010
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
historia nauk geologicznych
Syberia
Daleki Wschód
history of geoscience
Siberia
Far East
Opis:
Systematyczne badania obszarów Syberii i Dalekiego Wschodu rozpoczęły się z początkiem XIX wieku. Znaczący udział w tych badaniach mieli Polacy. Byli to zarówno zesłańcy, którzy trafili tam po upadku kolejnych powstań, jak i podróżnicy, badacze i przemysłowcy, których przyroda lub chęć zysku ciągnęły w tamte strony. Wśród nich było wielu geologów. Wachlarz ich zainteresowań był bardzo szeroki i obejmował również etnografię, zoologię, botanikę. Wykonywali oni również pomiary meteorologiczne i topograficzne. W artykule przedstawiono sylwetki słynnych geologów: Aleksandra Czekanowskiego, Jana Czerskiego, Karola Bohdanowicza, Józefa Morozewicza oraz mniej znanych – Antoniego Giedroycia, Leona Barszczewskiego, Bronisława Grąbczewskiego, Leonarda Jaczewskiego, Kazimierza Grochowskiego i Stanisława Doktorowicza-Hrebnickiego. Wszyscy byli znakomitymi badaczami i zapisali się złotymi zgłoskami w poznanie obszarów położonych na wschód od Uralu. Część z nich, po odzyskaniu niepodległości wniosła doniosły wkład w rozwój nauk geologicznych w Polsce.
Systematical studies of Siberia and the Far East regions were started in the beginning of XIX century. Poles participated significantly in those studies. There were deportees after overthrowing of the following insurrections and also voyagers, explorers and industrialists – all of whom were attracted to that region by nature and cupidity. There were a lot of geologists among those people. Their interests ranged from ethnography, zoology to botany. They also carried on meteorological and topographical measurements. In the present paper, there are outlines of such well-known explorers as: Aleksander Czekanowski, Jan Czerski, Karol Bohdanowicz or Józef Morozewicz and, less famous, Antoni Giedroyć, Leonard Barszczewski, Bronislaw Grąbczewski, Leon Jaczewski, Kazimierz Grochowski, Stanisław Doktorowicz-Hrebnicki portrayed. All of them were brilliant researchers, they distinguished themselves in exploration territories east of Ural. After recovery of independence, part of them contributed significant share in developing of geological sciences in Poland.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2010, 439 (2); 475-489
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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