Browsing ELibrary by Title
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- Browsing ELibrary by Title
JavaScript is disabled for your browser. Some features of this site may not work without it.
Browsing ELibrary by Title
Now showing items 8530-8549 of 21936
-
(2002)Organic petrologic (maceral analysis) and bulk organic–geochemical studies were performed on five sediment cores from the Eurasian continental margin to reconstruct the environmental changes during the last ∼13 000 yr. The ...
-
(2004)Muddy carbonate deposits near the Dry Tortugas, Florida, are characterized by high organic carbon remineralization rates. However, approximately half of the total sedimentary organic matter potentially supporting ...
-
(1990)Massive polymetallic sulfides are currently being deposited around active submarine hydrothermal vents associated with spreading centers. Chemoautolithotrophic bacteria are responsible for the high production of organic ...
-
(1987)The authors analyzed data obtained during a study of iron-manganese nodules and surrounding sediments of the Pacific and Indian oceans. The data indicate that in the top 30 to 50 cm of bottom sediments there occurs active ...
-
(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 ...
-
(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 ...
-
(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 ...
-
(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 ...
-
(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 ...
-
(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 ...
-
(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- ...
-
(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 ...
-
(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 ...
-
(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 ...
-
(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 ...
-
(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 ...
-
(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 ...
-
(1990)To elucidate the origin of clinopyroxenites and melanocratic gabbros, which generally form annular rims around the dunite 'cores' of the plutons, and of their paragenetic association with the dunites, it is important to ...
-
(1999)Compact type A (CTA) inclusions are one of the major types of coarse-grained refractory inclusions found in carbonaceous chondrites. They have not been studied in a systematic fashion, leading to some uncertainties and ...
-
(2001)A kerogen, termed aBS base, from the Gorodische section (Russian Platform) was studied using a combination of microscopic, spectroscopic and pyrolytic methods in order to determine its chemical structure, source organisms ...
Now showing items 8530-8549 of 21936