Browsing by Title
- DSpace Home
- →
- Browsing by Title
JavaScript is disabled for your browser. Some features of this site may not work without it.
Browsing by Title
Now showing items 8942-8961 of 43490
-
(2001)We present the first investigation of in situ high-pressure and high-temperature bubble growth in silicic melts. In a hydrothermal diamond-anvil cell, a haplogranite melt (79 wt% SiO2) is hydrated then subjected to cooling ...
-
(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 ...
-
(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) ...
-
(2006)The feasibility of in situ stable Fe isotope ratio measurements using UV-femtosecond laser ablation connected to a multiple-collector inductively coupled plasma mass spectrometer (MC-ICP-MS) has been investigated. Different ...
-
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 ...
-
(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 ...
-
(2006)The swelling properties of a bentonite MX-80 and a Na montmorillonite obtained from MX-80 purification were analyzed as a function of relative humidity in free and constrained conditions. Gravimetric and XRD techniques ...
-
(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 ...
-
(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 ...
-
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, ...
-
(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 ...
-
(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, ...
-
(2006)The sources and sinks of methane, an important greenhouse gas, are poorly constrained. Remote sensing techniques can significantly improve our understanding of the global methane budget. Field and laboratory studies using ...
-
(2006)Bulk composition and specific reaction history among common silicate minerals have been proposed as controls on monazite growth in metapelitic rocks during amphibolite facies metamorphism. It has also been implied that ...
-
(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 ...
-
(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 ...
-
(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 ...
-
(2006)Structural changes during dehydration and subsequent decomposition in thaumasite Ca3Si(SO4)(CO3)(OH)6·12 H2O were studied by in situ synchrotron powder diffraction between 303 and 1,098 K. Evolution of the crystal structure ...
-
(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, ...
-
(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 ...
Now showing items 8942-8961 of 43490