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Browsing ELibrary by Title
Now showing items 13433-13452 of 22187
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(2001)U–Pb isotopic dating has been carried out on titanites and rutiles from the Karelian Protocraton, the Belomorian Mobile Belt and the intervening junction zone. These are some of the principal Archaean crustal units in the ...
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(1988)There could be isomorphism between titanium and tin in minerals of the series from malayaite, CaSnO[SiO4], to sphene, CaTiO[SiO4], because they are isostructural. Published analyses of malayaite from 10 deposits revealed ...
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(1993)Titanium is a dispersed lithophile element commonly regarded as chemically immobile at sub-magmatic temperatures. However, a growing number of field studies demonstrate that Ti is somewhat mobile in certain environments. ...
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(2003)Exsolution microstructures including ilmenite±garnet in clinopyroxene and rutile in garnet are common in clinopyroxenite and eclogite from the Sulu ultrahigh-pressure (UHP) terrane. In order to understand the phase relations ...
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(1990)Basalts are the most common volcanic rocks. The way in which their composition is related to types of geological structure in which they occur is a subject of great interest both for the theory of present-day endogenous ...
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(2004)Lithofacies analyses and paleogeographic reconstructions of the middle Sarmatian sequence in the central Ciscaucasus, which hosts the most promising titanium–zirconium placers of the Stavropol region, indicate that ore ...
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(2003)Eleven species and subspecies of the genus Punctaptychus Trauth, 1927 and a new genus, Tauriaptychus, from the Tithonian-Berriasian, Valanginian, and Hauterivian of the Mountainous Crimea are described: P. punctatus ...
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(2006)Despite great practical achievements, sequence stratigraphy failed to elaborate until now the reliable technique for establishing relative sea-level fluctuations (RSLF). The method proposed recently by Yu.A. Volozh with ...
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(2001)Phenomenon of deformed rock mass destruction has been considered. Mathematical models of rock mass destruction have been discussed. It has been shown that system of differential equations of hyperbolic type describes rock ...
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(2001)Problems of destruction of deformable media have been solved. Mathematical models have been used during solving the problems. Differential equations of hyperbolic type have been applied in the models. The case of rock mass ...
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(2002)Recent data on the Lower Devonian biostratigraphy in the studied regions are generalized. The described terrigenous and carbonate reference sections yield sharply different faunal assemblages. Carbonate sections of Mongolia, ...
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(2003)The suggested hypothesis is in sympathy with the new concept of astronomical theory of paleoclimate (Bol'shakov and Bol'shakov, 1999) that implies a greater climatic impact of eccentricity fluctuations than it follows from ...
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(2006)Stratigraphic position of the Oligocene-Miocene (Paleogene-Neogene) boundary in the northern Caucasus and, in this connection, of the Alkun Formation and the Caucasian regional stage in geological sections of Maikop deposits, ...
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(2003)The study of Jurassic gastropods from Central Russia revealed three genera met for the first time in the region under discussion, i.e., Teutonica Schröder, 1995, Longaevicerithium gen. nov., and Novoselkella gen. nov. The ...
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(2002)On the base of the protoconch structure, the subgenus Plicacerithium Gerasimov, 1992, of the genus Procerithium is reconsidered as a separate genus and moved from the family Procerithiidae to the family Epitoniidae. Several ...
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(1999)The real structures of clinotobermorite, tobermorite 9 Å, and tobermorite 11 Å were determined through the application of OD approach, which allowed us to explain their peculiar disorder and polytypic features and to derive ...
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(2002)Tomographic travel time inversion of seismic compressional (P) and shear (S) wave data from the long-range deep seismic sounding experiment Fennoscandian Long Range (FENNOLORA) reveals the velocity structure of the crust ...
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(2002)We develop the method of tomographic inversion, called RR-R scheme, which is based on joint use of teleseismic P or S refracted rays and corresponding PP or SS rays with bounce points located within a study region. This ...
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(2001)Observed Tertiary palaeolatitudes in central Asia are more southerly (by about 1600 km on average) than those predicted from the Eurasian reference palaeopoles. Subsequent northward displacements of the central Asian ...
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TOOTH ENAMEL MINERALIZATION IN UNGULATES: IMPLICATIONS FOR RECOVERING A PRIMARY ISOTOPIC TIME-SERIES (2002)Temporal changes in the carbon and oxygen isotopic composition of an animal are an environmental and behavioral input signal that is recorded into the enamel of developing teeth. In this paper, we evaluate changes in ...
Now showing items 13433-13452 of 22187