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Browsing ELibrary by Title
Now showing items 5175-5194 of 21934
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(2003)The purpose of this investigation is to study the relationship of Au, Pt, and Pd distribution in ores of the deposit with contents of coaly substance (CS) and sulfide minerals. This problem is urgent, because no ...
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(2002)Possible reasons of a difference in modes of invisible gold occurrences in arsenopyrite at the Olympiada and Veduga deposits that are closely spatially situated and occur in a similar geological setting were considered. ...
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(2002)As part of the "Drosophila of igneous petrology" (Barker 1983), alkaline rocks have gained much attention among petrologists worldwide, mainly due to their distinct geochemistry, and many geoscientists still consider them ...
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(2002)A new genus and species of the family Trirachodontidae, Neotrirachodon expectatus gen. et sp. nov., is described on the basis of the lower jaw previously referred to as the gomphodont cynodont Antecosuchus ochevi. The new ...
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GONDWANA ALIVE CORRIDORS: EXTENDING GONDWANA RESEARCH TO INCORPORATE STEMMING THE SIXTH EXTINCTION (2003)In this volume in honour of John Rogers we propose a new way of looking at Gondwana and we urge our colleagues everywhere to join us in this venture. The Gondwana Alive Corridors provide a way of celebrating the unique ...
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(1999)Gonnardite is a fibrous zeolite. Its chemical variability and the frequent close association with thomsonite and other zeolites have made the chemical and crystal structural definition of the mineral difficult. Only recently ...
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(1999)Gorelovsky volcanic center is localized in the area of a high negative gravity anomaly. Its volcanic history included the growth of a pre-caldera dacite-andesite cone, the formation of a large caldera as a result of the ...
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(2001)Topographic data sets are often composed of terrain samples arranged in irregular meshes. Many gradient estimation methods require the data to be arranged in a regular mesh; irregular meshes present a difficulty for them. ...
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(2005)Kaolinite was intercalated with n-hexylamine, n-octadecylamine and n-docosanamine, using methanol-kaolinite as the precursor. The intercalation compound with n-docosanamine presented the largest basal spacing for a kaolinite ...
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(2001)Diffusion-controlled growth rates of polycrystalline enstatite reaction rims between forsterite and quartz were determined at 1,000 °C and 1 GPa in presence of traces of water. Iron-free, pure synthetic forsterite with ...
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(2001)An absolute value for the interfacial free energy of high-angle grain boundaries in olivine/fo90s been derived from a microstructurally equilibrated coarse-grained natural peridotite. The three-dimensional configuration ...
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(2002)To learn more about the kinetics and mechanisms of coarsening and melt inclusion formation, we investigated the effects of melt content, viscosity, and topology on the microstructural evolution of partially molten and ...
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(1988)Evolution of grain size in synthetic marbles was traced from compaction of unconsolidated powder, through primary recrystallization and normal grain growth, to a size stabilized by second phases. To form the marbles, reagent ...
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(2005)Conspicuous grain scale deformation is observed in some ultra-high-pressure (UHP) metamorphic rocks of the Dora Maira Massif, Western Alps, although no significant strain is discernible on the mesoscopic scale. In a ...
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(2003)Geologic, experimental, and geodetic studies indicate that ductile shear zones do not deform in steady state. We present a theoretical model for an elastically loaded ductile shear zone deforming by combined dislocation ...
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(2001)It is widely believed that grain size reduction by dynamic recrystallization can lead to major rheological weakening and associated strain localization by bringing about a switch from grain size insensitive dislocation ...
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(1999)The Rb-87/Sr-86 and Sr-87/Sr-86 ratios of Laptev Sea sediments, of Arctic Ocean sediments and of suspended particulate matter (SPM) from Siberian rivers (Lena and Khatanga) form 'pseudo-isochrons' due to grain-size separation ...
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(2001)Scaling relationships for grain size-dependent viscosity convection are derived assuming that eutectoid-like transformations at 660 km depth produce very small grains and that the grain size is mainly controlled by a coupled ...
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(2004)In order to examine grain-scale permeabilities in materials that are microstructurally similar to those of the lower crust and upper mantle, we produced porous synthetic quartzites with small fractions of an additional ...
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(1998)Permeability (k) was measured on synthetic, monomineralic aggregates of quartz and calcite, which serve as analogs for texturally equilibrated, fluid- and melt-bearing rocks such as those in the deep crust and mantle. ...
Now showing items 5175-5194 of 21934