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 2528-2547 of 21934
-
(2000)The siderophile element problem in mantle geochemistry has not been solved by treating the mantle as the residue of core formation in a closed system. Conventional solutions to the problem involve the addition of new ...
-
(2004)Core motion induced by lunisolar precession of the mantle is analysed and compared with experiments and Earth observations. First-order motion has the core axis lagging the mantle axis in precession by a small angle. This ...
-
(2002)This paper applies the relationship between the matrix multivariate covariance and the covariance of a linear combination of a single attribute to analyze modeling with nested structures. This analysis for modeling of ...
-
(1990)We have identified for the first time a specific sign of the existence of a definite 'biolithogenic character' of the material of bauxite, which allows realistic study and genetic testing of the different stages in the ...
-
(2001)Accurate relative noble gas abundances of mantle-derived melts are required in order to further understand the distribution of noble gases in the mantle and fractionation of noble gases during the melting process. Noble ...
-
(2002)The presence of common lead contamination in zircons used for U-Pb geochronology is a potentially serious source of error. Traditionally, common lead is measured by analysis of 204Pb, and the isotopic composition of lead ...
-
(2001)We present integrated relative production rates for cosmogenic nuclides in rock surfaces, which take into account reported variations of the geomagnetic field intensity during the past 800,000 yr. The calculations are based ...
-
(2003)A correction procedure is proposed to account for the effect of secondary X-ray fluorescence near grain boundaries in electron microprobe analysis. The procedure is based on the Monte Carlo simulation method, which is used ...
-
(2002)The use of the ELF (extremely low frequency) radio station “Zevs” for the study of the stress–strain state of geological media is considered. Analysis of prior research on the connection between tidal phenomena and apparent ...
-
(2000)Tsvetkovitids and nathorstitids (Ammonoidea) from the entire Boreal realm are revised on the basis of most recent data on their morphology, systematics, and evolution. The elucidated stratigraphic ranges of both taxonomic ...
-
(1998)We report results of a study into the size, chemical composition, mineralogy and oxygen isotopic compositions of 40 chondrules, in the size range 1-9 mm diameter, separated from Chainpur (LL3.4) and Parnallee (LL3.6). These ...
-
(2001)Osmium (Os), strontium (Sr), neodymium (Nd) and lead (Pb) isotopes have been measured on a suite of aphyric basalts from 12 islands of the Austral-Cook island archipelago, an area which exhibits a range in Pb isotope ...
-
(2005)Micron-scale variations in the trace-element (TE) composition of tropical coral skeletons were measured using laser-ablation ICP-MS (LA-ICP-MS) as part of an investigation into the chemical processes underlying paleoenvrionmental ...
-
(2002)Numerous magmatic-hydrothennal metal deposits in SE Europe occur in relatively narrow belts of magmatic rocks that have been classically related to subduction. In contrast to the hundred million years of convergence and ...
-
(1989)The correlation between compositions of metasomatites and conjugate ore mineralization has already been analyzed for various ore and metasomatic rock associations, formed at different depths. Here the authors illustrate ...
-
(1990)In the present paper, we shall identify correlations between the invariants of the hydrodynamic processes in lakes and the characteristics of the perturbation-producing sources.
-
(2005)We investigated the influence of thermal maturity on the hydrogen isotope ratios of sedimentary hydrocarbons to prove that the isotope ratio of hydrocarbons mirrors paleoclimate signatures. δD values from n-alkanes and ...
-
(1989)The question regarding the influence of the abundance of a chemical element on the total number of its mineral species has attracted the attention of researchers. At the present time, more complete statistical data on the ...
-
CORRELATION OF ALBIAN RADIOLARIAN ASSEMBLAGES FROM THE GREATER CAUCASUS, EUROPE, AND MEDITERRANEAN (2002)Generalized data on Albian radiolarians from the Greater Caucasus refine composition of their Spongostichomitra elatica (middle Albian) and Dictyomitra disparlita-Crolanium triangulare (upper Albian) assemblages. The ...
-
(2002)The paper reports the results of complex studies of core samples of Archean rocks from the Kola Superdeep Borehole and analogues of these rocks collected at the surface. The analogy of these rocks is justified by the ...
Now showing items 2528-2547 of 21934