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Now showing items 16146-16165 of 38944
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(2001)The behaviour of rock deformation and its failure characteristics under loading and unloading conditions are substantially different. In this paper, triaxial unloading tests have been designed to simulate the unloading ...
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(2000)The high abundance with which tricyclic terpenoids have previously been detected in Tasmanite oil shales has led to the strong suspicion that the source of these compounds is the Tasmanites microfossil prevalent in these ...
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(2001)We start giving a brief review on the current discussion of polyamorphism. In particular, the problems of experimentally identifying amorphous–amorphous or liquid–liquid transitions are considered, which are often related ...
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(2003)The exact nature of tripuhyite remains controversial more than 100 years after the first description of the mineral. Different stoichiometries and crystal structures (rutile or tri-rutile types) have been suggested for ...
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(1999)The presence of primary troilite in chondrules requires that nebular temperatures were <650 k (the 50% condensation temperature of s) at the time chondrule formation and that chondrules were molten for periods short enough ...
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(2002)Troughs under threshold analysis has so far found little application in the modeling of minimum streamflows. In this study, all the troughs under a certain threshold level are considered in deriving the probability ...
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(2003)I present a general model for true polar wander (TPW), in the context of supercontinents and simple modes of mantle convection. Old, mantle-stationary supercontinents shield their underlying mesosphere from the cooling ...
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(1999)The apparent polar wander path for the Pangea supercontinent is about 35° long for the interval of 295-205Ma, which means that in that interval Pangea rotated over an angle of 35° with respect to the rotation axis about ...
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(1998)Paleomagnetically determined apparent polar wander (APW) paths should contain components of individual plate motions as well as true polar wander (TPW), the uniform motion of the mantle relative to the spin axis. Quantifying ...
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(2004)Two generations of true triaxial loading (TTAL) apparatuses are presented. First generation apparatuses were intended primarily for true stress state imitation in rock or mineral specimens. Advanced second-generation ...
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(PANGAEA, 2001-03-23)Scientific results of long-term investigations carried out by the P.P. Shirshov Institute of Oceanology, results of recent expeditions, published materials of other Institutes in the field of carbon cycle in the Barents, ...
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(2003)Вид Bothriolepis extensa Sergienko был описан в 1961 г. из тубинской свиты (верхний девон, фамен) Минусинской котловины (Красноярский край). Переизучение коллекции по этому виду выявило весьма необычные особенности в ...
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(2000)Tumchaite, Na2(Zr,Sn)Si4O11·2H2O, is a new species from the Vuoriyarvi alkali-ultrabasic massif, Murmansk Region, Russia, where it occurs as colorless to white tabular monoclinic crystals associated with calcite, dolomite, ...
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(2001)The tungsten distribution in intrusive rocks of the region was studied based on analysis of ~250 composite samples combined from more than 900 individual samples. The average W content in the Paleozoic granites and ...
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(1999)The rates of accretion and core formation of the Earth and other inner solar system objects can be effectively studied using the newly developed 182Hf-182W chronometer. This approach offers far more leverage than any other ...
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(2004)Most geologists share the concept of the lithophile origin of tungsten mineralization and its relation to granitoid magmatism. Nevertheless, geological-prospecting practice frequently reveals tungsten mineralization of the ...
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(1990)The presence of two unusual zirconium minerals (tungsten-containing baddeleyite and the hydrated zirconium silicate) in the stratiform Algama ore occurrence suggests a new genetic type of tungsten-zirconium mineralization. ...
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(2004)The crystal structure of turanite, Cu 2+ 5 (V 5+ O 4) 2 (OH) 4 , from the Tyuya–Muyun Ra–U deposit, the Alai Ridge foothills, Osh district, Kyrgyzstan, triclinic, space group P ¯ 1, a 5.3834(2), b 6.2736(3), c 6.8454(3) ...
Now showing items 16146-16165 of 38944