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Browsing ELibrary by Title
Now showing items 5339-5358 of 21768
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(2003)High-pressure granulites are characterised by the key associations garnet-clinopyroxene-plagioclase-quartz (in basic rocks) and kyanite-K-feldspar (metapelites and felsic rocks) and are typically orthopyroxene-free in both ...
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(1996)Luminescence spectroscopy of transition elements can provide useful information on their binding properties, local environment and crystal-field stabilization energies in various materials. In order to investigate the ...
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(2003)High-pressure multi-anvil experiments (5 to 10 GPa) have been conducted on a basalt + calcite mixture in order to constrain the fate of carbonates carried on subducted ocean floor. Up to 6 GPa, carbonate breakdown occurs ...
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(2003)Mafic microgranular enclaves, composed of diopside and rare magnesium biotite phenocrysts in a groundmass of diopside, biotite, apatite, Fe-Ti-oxides, and alkali feldspar, are associated with Neoproterozoic Piquiri potassic ...
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(2003)Many ocean island basalts (OIB) that have isotopic ratios indicative of recycled crustal components in their source are silica-undersaturated and unlike silicic liquids produced from partial melting of recycled mid-ocean ...
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(2004)We review experimental phase equilibria associated with partial melting of mafic lithologies (pyroxenites) at high pressures to reveal systematic relationships between bulk compositions of pyroxenite and their melting ...
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(2001)The crystal structure of MgFe2O4 was investigated by in situ X-ray diffraction at high pressure, using YAG laser annealing in a diamond anvil cell. Magnesioferrite undergoes a phase transformation at about 25 GPa, which ...
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(1995)The phase behaviour of the carbonates in the system MgO-CaO-SiO2-CO2 have been studied in a diamond-anvil press employing YAG laser heating from about 40 to 260 kbar at # 1000°C. It is already known that at the CaCO3-MgCO3 ...
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(2002)Infrared absorption spectra of brucite Mg (OH)2 were measured under high pressure and high temperature from 0.1 MPa 25 °C to 16 GPa 360 °C using infrared synchrotron radiation at BL43IR of Spring-8 and a high-temperature ...
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(2001)The Raman spectra of synthetic α-Co2SiO4 and α-Ni2SiO4 olivines have been studied at room temperature and various pressures. All the Raman frequencies of the two olivines increase with increasing pressure, and most of the ...
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(2001)The structural evolution up to 5 GPa of a natural heulandite was studied using in situ single-crystal X- ray diffraction data from a diamond-anvil cell (DAC) with glycerol as the pressure transmitting medium. Linear ...
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(2002)The RP structural evolution of a natural scolecite from Iceland (space group Cc) was studied up to 5 GPa using in situ single-crystal X-ray diffraction data from a diamond-anvil cell (DAC) with silicon oil as non penetrating ...
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(2004)The high-pressure character of the metamorphic rocks from the Dakhov Block makes them similar to the Blyb eclogite-bearing complex in the southern part of the Front Range, but the maximum pressures in the block were lower ...
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(2004)The ZrO 2-TiO2 phase diagram was studied with synthesis experiments between 1200°C and 1650°C, 1 atm and 28 kbar, investigating the effect of pressure on the compositions of rutile [TiO2], zirconia [ZrO2], and zirconium ...
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(2001)A synthesis of high-resolution (Chirp, 2-7 kHz) seismic profiles in the South Korea Plateau reveals that large masses of wavy stratified sediment (≈60-90 m thick) cover broad, gently sloping (<0·5°) ridges in water depths ...
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(2005)The high sensitivity of the satellite-transition (ST) MAS NMR technique was exploited to obtain high-resolution 17O MAS NMR spectra of the three polymorphs of Mg2SiO4: forsterite (α-Mg2SiO4), wadsleyite (β-Mg2SiO4), and ...
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(2004)A number of different geodynamic models have been proposed to explain the early tectonic evolution of the Baltic Shield. To provide additional geophysical constraints on these models, we performed a teleseismic tomography ...
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(2003)Assessment of contributions from shallow lithosphere to teleseismic wave front distortion is a prerequisite for high-resolution regional teleseismic tomography. Several methods have been proposed in the past for the ...
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(2002)Palaeotemperature sensitive series from tree-rings, ice cores, corals and documentary sources are combined to producepalaeo summer-temperaturereconstructions (AD 1970-1761)and geographical eigenvector (EOF) maps in both ...
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(2004)Analyses of benthic foraminifera in sediment cores taken at about 1000 m water depth at the Yermak Plateau and the Barents Sea slope, adjacent to the position of the ice-sheet edge during the Last Glacial Maximum, show ...
Now showing items 5339-5358 of 21768