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Now showing items 10508-10527 of 39124
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(PANGAEA, 1973-12-06)
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(2004)The three-way correlation among organic matter concentrations, specific surface area and small mesopores observed for many soils and sediments led to the hypothesis that enclosure within the pores might explain the apparent ...
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(PANGAEA, 1993-04-13)
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(1995)Sediments from Units I and II of the Black Sea were analyzed to assess the early diagenetic formation of organic sulfur compounds (OSC). A series of isomeric C28-2,4-dialkylthiophenes was found at low concentrations in ...
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(PANGAEA, 2016-04-04)Dating of sediments collected in gravity cores during Leg 1 of the 1988 R/V Knorr expedition to the Black Sea suggests that the onset of water-column anoxia at ~7.5 ka was virtually synchronous across the basin over a depth ...
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(2003)The orientation dependence of the luminescence of a well-characterized plagioclase crystal at room temperature and 40 K is reported. A beam of H+ ions was used to provide the excitation. Ion beam luminescence provides ...
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(Федеральное государственное бюджетное учреждение науки Геофизический центр Российской академии наук, 2016)The results of the neutron diffraction investigation were compared with similar results obtained by analysing more $\mu$-CT, high resolution photographic and thin section images of a cylindrical sample of the textured ...
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(IOP Publishing, 2015)The paper describes the results of the characteristic structure features of oil-bearing rocks via paleomagnetic oriented cores. Volume core model is plotted on the basis of circular panoramic images. In applying scanned ...
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(2001)The chemical structure of organic nitrogen and the mechanisms of its cycling in the oceans still remain elemental questions in contemporary marine sciences. The Arctic Ocean provides a model system for studying the fate ...
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(2001)To account for the vastness of the northern arid steppes during Glacial episodes, I propose the proximate key variable was simply frequent clear skies. This hitherto under-emphasized point is the hub which best explains ...
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(2001)Analysis of the origin and dispersal of Cambrian brachiopods shows that the initial differentiation of brachiopods into the Equatorial and Notai biochores took place in the second half of the Atdabanian. In the Botomian ...
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(1990)A number of C25 and C30 highly branched isoprenoid (HBI) sulphur compounds (E.G., thiolanes, 1-oxo-thiolanes, thiophenes, and benzo[b]thiophenes) with 2,6,10,14-tetramethyl-7-(3-methylpentyl)pentadecane and 2,6,10,14,18- ...
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(2004)Remobilization and accumulation of iron and manganese were measured by porewater and sediment–core analyses at six contrasting sedimentary environments of Lake Baikal, with bulk sedimentation rates varying between 0.8 and ...
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(1987)The minor-element/major-element trends among the ureilites were investigated using electron microprobe data on olivine and pigeonite cores in eight low-shock ureilites. The results show well-defined correlations between ...
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(2000)Chemogenic high-Al deposits (protobauxites) were studied in the geothermal fields of Kikhpinych Volcano. Conditions of their deposition, mineralogy, and paragenetic associations are discussed. The main factors that favored ...
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(2004)The analysis of the data on the geotraverse Arctic-2000 shows that the bottom sediments of the Mendeleev Rise and associated basins are derived from local source. The inference that has been about their relation to ice-rafting ...
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(2005)Iron-poor and refractory lithophile element (RLE) rich forsterite grains occur in all major types of unequilibrated chondrites. In our laser ablation inductively coupled mass spectrometry (LA-ICPMS) minor and trace element ...
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(2003)Mafic–ultramafic-hosted hydrothermal Fe–Cu–(Ni–Co) sulfide ores from the Main Uralian Fault Zone (MUFZ), South Urals (Ivanovka and Ishkinino ore fields), contain a relatively large (up to 3%) proportion of chromite. This ...
Now showing items 10508-10527 of 39124