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Browsing Геология России by Title
Now showing items 7185-7204 of 39195
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(2006)We report the application of an in situ method to obtain field dissolution rates of fine mineral particles in soils. Samples with different metal-containing mineral and slag particles (lead oxide, copper concentrate and ...
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(2001)In this work, an original Atomic Force Microscopy (AFM) investigation was carried out combining in situ microtopography measurements with solution chemistry. The dissolution of galena (PbS) surface in acidic (HCl, pH = 1) ...
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IN SITU MEASUREMENT OF VISCOSITY OF LIQUIDS IN THE FE-FES SYSTEM AT HIGH PRESSURES AND TEMPERATURES (2000)The viscosity of liquid FeS and Fe-FeS eutectic was measured at pressures between 0.5 and 5.0 GPa using a synchrotron-based falling sphere technique. We obtain viscosities of 2 × 10−2 to 4 × 10−3 Pa-s in FeS at 1450 to ...
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(2001)Here we report the phase boundary of pyrope garnet (Mg3Al2Si3O12) to Al-bearing silicate perovskite plus corundum, with the highest transition pressure determined by in situ measurements in a multi-anvil apparatus at high ...
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(1997)In situ oxygen isotope analysis of silicate minerals has been validated by interlaboratory calibration using an excimer laser (KrF fill gas, 248 nm), F2 gas fluorinating reagent, and O2 gas as mass spectrometer analyte. A ...
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(2003)The in situ Pb geochronological capabilities of a laser ablation-inductively coupled plasma-mass spectrometer (LA-ICP-MS) coupling a magnetic sector ICP-MS with a Nd:YAG laser probe working at 213 nm have been tested on ...
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IN SITU PRODUCED 10BE MEASUREMENTS AT GREAT DEPTHS: IMPLICATIONS FOR PRODUCTION RATES BY FAST MUONS (2003)In situ cosmogenic 10Be values have been used to investigate a Brazilian quartz vein from the surface to a depth of 15 m. At depths greater than 1000 g/cm2, deep enough for neutron-induced reactions to be insignificant, ...
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(2001)The intensity of an ESR signal associated with oxygen vacancies in quartz (E1' center and heat-treated E1' center) are correlated with the radiometric age of their host rocks. Two natural processes are responsible for the ...
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(1997)Raman spectra of a hydrothermal fluid, interacting with elementary sulfur, have been measured in the temperature range from 200 up to 500°C at a constant pressure of 1000 bar. The main products of the interaction are H2S, ...
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(1995)In situ high-temperature Raman spectra are presented below and above the glass transition temperature (Tg) of the 0.5Na2O.0.5Fe2O3.3SiO2 (Fe-albite, NFS0), 1.5Na2O.0.5Fe2O3.3SiO2 (NFS2), K2O.0.5Fe2O3.3SiO2 (KFS), and reduced ...
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(1999)The temperature induced goethite-hematite phase transformation that occurs at about 250 C was studied using in situ synchrotron X-ray powder diffraction with a capillary Debye-Scherrer geometry and a translating image plate ...
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(1999)Feldspar minerals are the most abundant minerals in the earth's crust. Therefore, alteration reactions involving feldspars and aqueous fluids must be accounted for in a wide variety of geochemical processes, especially ...
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(1997)This paper reports the successful application of laser ablation microprobe-inductively coupled plasma-mass spectrometry (LAM-ICP-MS) to the in situ analysis of a diverse suite of twenty trace elements including Zr, Hf, Nb, ...
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(2000)Lizardite was pressurized up to about 28 and 20 GPa and heated at 1310 (+/-50) and 1100 (+/-100)°C; antigorite was pressurized at about 25 and 22 GPa and heated at ~1000°C, with a Nd:YAG laser using the double-side laser ...
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(2005)We present the phase relations in anhydrous CaO-MgO-FeO-Al2 O3-SiO2-pyrolite to examine the influence of compositional difference between pyrolite and Mg2 SiO4 on the post-spinel phase transformation. It is shown that in ...
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(2002)Phase transitions in MgAl2O4 spinel have been studied at pressures 22-38 GPa, and at temperatures up to 1600 °C, using a combination of synchrotron radiation and a multianvil apparatus with sintered diamond anvils. Spinel ...
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(2002)An experimental technique to make real-time observations at high pressure and temperature of the diamond-forming process in candidate material of mantle fluids as a catalyst has been established for the first time. In ...
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(2005)Дискуссия о возрасте нефелиновых сиенитов Бердяушского массива расположенного на западном склоне Южного Урала и прорывающего стратотипические рифейские образования Башкирского антиклинория имеет длительную историю. Новые ...
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(2004)We present a new in situ, multiple electron-multiplier LA-ICP-MS technique for the analysis of boron isotopes (δ11B) at <1%% 2σ precision and at the nanogram level. Sample materials analyzed were all natural and synthetic ...
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(2000)A variety of 29Si, 27Al, 23Na, 17O and 1H NMR data are consistent with the formation of Q3 AlOH and SiOH groups upon dissolution of H2O into aluminosilicate glasses. 29Si single-pulse and 1H-29Si CP/MAS data present more ...
Now showing items 7185-7204 of 39195