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Now showing items 15525-15544 of 39126
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(2002)Presents an abstract of the article 'The Role of Striations in Pyrite Crystal Growth,' by B. Morgan presented at the 28th Rochester Mineralogical Symposium.
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(1998)Pyrrhotite, in anoxic acidic conditions, exhibits an induction period before rapid dissolution occurs. The length of the induction period is controlled by the amount of surface oxidation products on the mineral surface, ...
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(1998)Pyrrhotite, in anoxic acidic conditions, exhibits an induction period before rapid dissolution occurs. The length of the induction period is controlled by the amount of surface oxidation products on the mineral surface, ...
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(2001)On sand and gravel beaches, the increase of the gradient of the beachface with increasing sediment size has been attributed to swash infiltration. The present study uses a process-based numerical model to examine in detail ...
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(2003)The geological record indicates that stages of relatively steady plate motion have been punctuated by comparatively brief periods in which plate velocities have reorganized. The distribution of buoyancy sources in the ...
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(PANGAEA, 1996-04-28)
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(2001)In 1989–1990 the SeaMARC II side-looking sonar and swath bathymetric system imaged more than 80 000 km2 of the seafloor in the Norwegian-Greenland Sea and southern Arctic Ocean. One of our main goals was to investigate the ...
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(1996)The recognition that much of the mountain building within the continents can be attributed to the collision and deformation of tectonic plates has revolutionized geology over the last 25 years. Although the model of a ...
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(1988)Analytical and numerical solutions to the differential equations for the conduction of heat with heat production or with fluid flow have been used to evaluate the role of volatiles in the thermal history of regional ...
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THE ROLE OF VOLCANICLASTIC MATERIAL IN ROCKS OF THE SEDIMENTARY COVER OF THE WEST SIBERIAN PLATFORM (2003)Presented is the analysis of lithogeochemical investigation of West Siberian platform (WSP) sedimentary rock composition for the period from Triassic to Paleogene inclusively. The conducted analysis in a complex with ...
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(1995)The role of water in oxygen isotope exchange experiments under hydrothermal conditions has been modelled mathematically using the results of recent ab initio calculations which provide energy data on the insertion of water ...
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(1994)Most variations in composition among primitive basalts from the Mariana back-arc trough can be explained by melting mixtures of an NMORB-type mantle source and an H2O-rich component, provided the degree of melting is ...
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(2000)Our previous work from regional geoid inversion over oceans has shown that there exists a low viscosity zone (LVZ) under the 660 km boundary. Nonlinear inversion has been applied for fitting to the intermediate-wavelength ...
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(2001)The rotational behaviour of circular objects is modelled using a two-dimensional finite element simulation. We present results for linear and non-linear viscous rheologies and explore parameter space for the rheology ...
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(2001)A Mw 7.8 shallow subduction earthquake occurred on 5 December 1997 near Cape Kronotsky, Kamchatka Peninsula. Broadband P-wave inversions, carried out using two independent methods, allowed us to locate the position of the ...
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(2003)The structure of the mantle beneath East Asia down to 800 km depth is investigated using full waveforms of seismic shear and surface waves. Epicentral distances are limited to less than 40°. In contrast with previous ...
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(Общество с ограниченной ответственностью «Георесурсы», 2018)The sand production problem for the water sources wellbores at the Vadelypskoye oilfield that is located in Hanty-Mansy region of Russia is considered. The serious issue during field operations is the open wellbore wall ...
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(2004)At stripping conducted at coal deposit Sagan-Nur, in the basement of old-frozen rocks overlaying the coal tar productive layer the sediments of slopewash genesis were found. Palynological spectra confirmed the tendency in ...
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(1999)The paper considers remarkable tectonic changes in the lithosphere evolution in the second half of the Cambrian-initial Ordovician. Certain relations are revealed between events caused by differently directed stresses in ...
Now showing items 15525-15544 of 39126