Browsing ELibrary by Subject "Holocene"
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Browsing ELibrary by Subject "Holocene"
Now showing items 1-20 of 140
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234U 238U MASS SPECTROMETRY OF CORALS: HOW ACCURATE IS THE UTH AGE OF THE LAST INTERGLACIAL PERIOD? (1991)Direct measurement of U and Th by mass spectrometry recently provided a spectacular improvement in the precision of coral dating by the UTh disequilibrium method [1]. Mass spectrometric data also provide a much better ...
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(2001)A sediment core taken from the Sea of Okhotsk, which is located in the western North Pacific rim with an extensive seasonal sea-ice cover, was investigated for lipid class compounds, total organic carbon, total nitrogen, ...
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(2003)A Cenozoic multi-species record of benthic foraminiferal calcite Sr/Ca has been produced and is corrected for inter-specific offsets (typically less than 0.3 mmol/mol) and for the linear relationship between decreasing ...
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(1999)During the last 12 thousand years the Udokan volcan oes erupted alkaline basalts and trachites. The strike of the fissure magma channels changed fr om NW to NE during the Middle Holocene in the interval of 7.9-4.6 thousand ...
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(1996)The catastrophic explosive eruptions at Khangar ~7000 14C years ago, Khodutka Maar ~2800 14C years ago, and Baraniy Amfiteatr ~1500 14C years ago are classified as a particular type of subcaldera eruptions. Although they ...
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(2002)We present a new assessment of the pre-anthropogenic U budget for the Holocene ocean. We find that the gross input of U to the ocean lies in the range 53±17 Mmol/year, where the dominant source is river runoff (42.0±14.5 ...
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(1996)The abundance and isotopic composition of total and pyrite sulphur have been determined in a core in the central Black Sea. Pyrite varies in concentration from roughly 2 wt% in the sapropel (Unit 2), to 0.8 wt% in the ...
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ACTIVE VOLCANOES OF KAMCHATKA: SPATIAL AND TEMPORAL DYNAMICS OF ERUPTIVE INTENSITY AND PRODUCTIVITY (2000)The total volumes of volcanic rocks and average annual productivities of active volcanoes were calculated for all volcanic zones of Kamchatka for the mid-Pleistocene, Late Pleistocene, and Holocene epochs. Average values ...
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AGES OF CALDERAS, LARGE EXPLOSIVE CRATERS AND ACTIVE VOLCANOES IN THE KURIL-KAMCHATKA REGION, RUSSIA (1995)The ages of most of calderas, large explosive craters and active volcanoes in the Kuril-Kamchatka region have been determined by extensive geological, geomorphological, tephrochronological and isotopic geochronological ...
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(2002)Although shelf-edge deltas are well-imaged seismic features of Holocene and Pleistocene shelf margins, documented outcrop analogues of these important sand-prone reservoirs are rare. The facies and stratigraphic architecture ...
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(2001)Holocene glacial deposits were dated using tephrochronoly and lichenometry in 17 cirques in the upper reaches of the Topolovaya, Olkhovaya, Vaktan Malkinsky, and Srednyaya Avacha Rivers in Kamchatka. All of the glaciers ...
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(1997)About 10,000 years ago, at the Pleistocene-Holocene border, some important events occurred: the glaciation stopped abruptly; the sea level elevated, and quick (for 20-50 years) climatic and ecological changes took place, ...
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(2001)The difference between the climates of the Bering Land Bridge and Asiatic (western) Beringia 18–20 ka ago is discussed. The climatic reconstructions of the Bering Land Bridge and western Beringia are based upon two methods. ...
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(2001)The content and distribution of biogenic components (CaCO3 and SiO2am) and elements (Corg, N and P) and some metals (Fe and Mn) were investigated in the marine Holocene sediments of the Baltic Sea including the Curonian ...
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(1999)The carbon fluxes, stocks and isotopic budgets of the land biosphere at mid-Holocene (6 ka BP) and last glacial maximum (21 ka BP) times are reconstructed with the CARbon Assimilation In the Biosphere (CARAIB) model forced ...
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(1992)Box cores recovered during Leg 4 of the 1988 R/V “Knorr” Black Sea Oceanographic Expedition from deep-water regions of the basin were dominated by coccolith-rich, microlaminated (Unit 1) sediment and muddy, gray turbidite ...
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(1988)Geologic, geomorphic and tephrochronologic data and the results of C14 dating indicate that in Kamchatka and the Kurile Islands in the last 40,000 to 45,000 years there were at least 50 very powerful explosive eruptions ...
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(2001)The benthic foraminiferal record of two sediment cores at 900 and 2500 m water depth in the marginal Arctic Ocean reflects fluctuations in paleoproductivity, ice sheet extent, and Atlantic water inflow. Highest paleoproductivity ...
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(2000)Stable carbon isotope ratios in the organic fraction of surface sediments from the Laptev Sea shelf were analyzed in order to study the modern distribution pattern of terrestrial organic matter. The δ13Corg signature of ...
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(2004)Two gravity cores (1.1 and 2.2 m long) of deep-water bottom sediments from Lake Khubsugul (Mongolia) were studied. The Holocene, biogenic silica and organic matter-rich part of the first core was subjected to AMS radiocarbon ...
Now showing items 1-20 of 140