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Browsing ELibrary by Title
Now showing items 9680-9699 of 22924
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(2001)Run products from high pressure experiments at 800-1,200 C and 5-14 GPa (corresponding to depths of 150 to 420 km) on a serpentine bulk composition [close to Mg3Si2O5(OH)4] were analysed by optical microscopy, micro-Raman ...
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(2004)We have experimentally investigated the phase and melting relations of garnet + clinopyroxene + carbonate assemblages at 2.5–5.5GPa, to assess the feasibility of carbonated eclogite as a source for some crustally emplaced ...
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(1997)Phase relations of natural phlogopite and phlogopite + enstatite compositions were determined experimentally at pressures of 4-8 GPa and temperatures of 1200-1500°C using a uniaxial split-sphere apparatus. Phlogopite in ...
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(2003)The pseudo-binary system CaMgSi2O6-KAlSi2O6, modeling the potassium-bearing clinopyroxene (KCpx) solid solution, has been studied at 7GPa and 1,100–1,650C. The KCpx is a liquidus phase of the system up to 60mol% of KAlSi2O6. ...
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(1987)Phase relations along the join Ca 2 Mg 4 Fe2+Si 8 O 22 (OH) 2 (Actinolite)-NaCa 2 Mg 3�2 Fe 0�8 2+AlSi 6 Al 2 O 22 (OH) 2 (Pargasite) have been studied at P H 2 O = 1 kb and the oxygen fugacities defined by the iron-wustite(IW) ...
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(2000)The phase relations of divariant and trivariant assemblages involving combinations of phengite, chlorite, biotite, K-feldspar, quartz and H2O in the KFASH, KMASH and KFMASH systems were calculated using a single thermodynamic ...
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(1995)Solid solution of #25 mole% Al2O3 expands the compositional stability field of Mg,Fe silicate perovskite well beyond the limits encountered in the simple ternary system MgO-FeO-SiO2. Aluminous perovskites synthesised in ...
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(2003)Halite single crystals in saturated solution were used to study dissolution precipitation creep (DPC) at conditions where plastic deformation is negligible. Specifically, the free unloaded surfaces of these crystals were ...
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(2006)Phase formation in ternary system of complex Sc, Na and Li phosphates was studied at 950°C and synthesis of new phases of definite composition was carried out. Obtained specimens were investigated with X-ray powder ...
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(2000)The phase transformations which take place in peridotite between 19 and 25 GPa have been investigated by performing experiments at closely spaced pressure intervals. All reactions involving Mg-perovskite are influenced by ...
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(2003)This work describes the sequence of transformations and their reaction kinetics during the oxidation of olivine in air at high temperature. A natural olivine sample from the layered series of the Ivrea-Verbano igneous ...
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(2000)Small concentrations of impurities can create profound differences in the thermodynamic stability and the physical behavior of crystalline materials. The dramatic changes produced by chemical substitutions are perhaps best ...
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(2004)The paper outlines the phosphorus cycle from magmatogenic apatite on continents to hydrogenic phosphorites in seas and oceans. It is established that terrigenous apatite is transformed into hydrogenic forms within weathering ...
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(2004)In situ high-pressure synchrotron X-ray diffraction and infrared absorption experiments for gibbsite were performed at room temperature up to 53 and 25 GPa, respectively. A phase transition was confirmed at about 2.5 GPa. ...
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(2001)Natural amphiboles with composition close to the binary join cummingtonite-grunerite and crystals of the same samples annealed at 700 °C for 55.5 h, in order to obtain different degrees of non-convergent cation order, have ...
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(2003)The phenomenon of the iron incorporation into feldspars because of wide abundance is of particular interest for investigators in order to get the information about the conditions of formation and structural features of ...
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(2004)In situ observations of the zircon-reidite transition in ZrSiO4 were carried out using a multianvil high-pressure apparatus and synchrotron radiation. The phase boundary between zircon and reidite was determined to be P ...
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(2002)We have developed a method for including phase boundary conditions into post-glacial rebound models that allows for conduction of latent heat away from the boundary. This method returns the chemical boundary results if ...
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(2002)While the effects of phase transitions of mantle materials are considered in convection studies, models of geophysical processes that occur on shorter timescales, such as seismic normal modes and Earth tides, often ignore ...
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(2001)The specific heat of lawsonite, CaAl2Si2O7(OH)(2).H2O, has been measured in the temperature range 125 K - 325 K. An anomaly is seen at 273 K, which is related to the Cmcm - Pmcn phase transition. The magnitude of the total ...
Now showing items 9680-9699 of 22924