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 9378-9397 of 43490
-
(2004)We report the results of iodine-xenon analyses of irradiated halide grains extracted from the H-chondrite Monahans (1998) and compare them with those from Zag () to address the timing of aqueous processing on the H-chondrite ...
-
(2002)Initial 129I/127I values (I-Xe ages) have been obtained for individual mineralogically characterized chondrules and interchondrule matrix from the enstatite chondrites Qingzhen (EH3) and Kota Kota (EH3). In view of the ...
-
(1997)The limiting molar conductances (Λ0) and ion association constants of dilute (<0.01 mol . kg-1) aqueous potassium chloride and hydroxide solutions were determined by electrical conductance measurements from 200 to 600°C ...
-
(2004)The solar wind (SW) and the solar energetic particles (SEP, 1-50 MeV/n), being two distinguishable components of the solar corpuscular emanation, provide the direct clue to the processes in the corona and chromosphere. ...
-
(2000)A method has been developed for separating the Cr dissolved in natural water from matrix elements and determination of its stable isotope ratios using solid-source thermal-ionization mass spectrometry (TIMS). The separation ...
-
(2001)Sensitive high resolution ion micro-probe (SHRIMP) U–Pb analyses of zoned zircons were performed to constrain the age and geodynamic significance of the Kokchetav ultrahigh-pressure (UHP) metamorphic rocks, which recrystallized ...
-
(1995)Ion probe measurements offer the advantage of in situ determination of water content with a few micrometres spatial resolution. After a brief review of ion microprobe procedures used for the determination of water concentration ...
-
(1996)The lunar Mg-suite, which includes dunites, troctolites, and norites, makes up to 20-30% of the Moon's crust down to a depth of #60 km. The remainder is largely anorthosite. This report focuses on norites (which consist ...
-
(1994)Five coarse-grained Ca-Al-rich refractory inclusions (CAIs) from the Efremovka CV3 chondrite are analysed for their magnesium isotopic composition using an ion microprobe. The analysed inclusions represent the three common ...
-
(1996)The potassium isotope composition of refractory phases in Efremovka CAIs has been measured by an ion microprobe. Extensive studies of terrestrial standards were carried out to ensure that the experimental procedures adopted ...
-
(1997)A synthetic calcite crystal that exhibits surface-structure-controlled, differential incorporation of a trace element was examined by ion microprobe to determine whether the controls causing differential element incorporation ...
-
(1998)We present here a study of plagioclase/melt partitioning of trace elements at their natural concentration levels, using sample charges from the widely cited plagioclase/melt partitioning experiments of Drake and Weill ...
-
(2006)Ion microprobe U-Pb dating of apatite is applied to a fossil tooth of a Allosaurid derived from the Hasandong Formation in the Gyeongsang basin, southeastern Korea. Twelve spots on a single fragment of the fossil dentine ...
-
(2001)Using a combination of dielectric spectroscopy and atomistic computer simulation techniques, the dynamical behaviour of the loosely bound (Na+d K+hannel ions in nepheline has been investigated. The low-frequency dielectric ...
-
(2000)We have developed a technique to measure abundances of Os, Ir, Pt, and Au in situ in Fe-Ni metal on a microscale using secondary-ion mass spectrometry. A Cs+ beam is used to generate negative secondary ions, and interferences ...
-
(2002)Whether transition element isotopes can be fractionated at equilibrium in nature is still uncertain. Standard solutions of Cu and Zn were eluted on an anion-exchange resin, and the isotopic compositions of Cu (with respect ...
-
(2001)The transport processes in anhydrous basalt melt were investigated experimentally in electrochemical cell apparatus, imposing a constant electric field with intensity E ranging from 0.11 to 1.26 V/cm at temperatures ...
-
(2004)Epidote group is important rock-forming minerals which form in a variety of geological conditions. Crystal structure of epidote contains 9-coordinated A1 and 10-coordinated A2 sites, and three kinds of octahedral sites, ...
-
(2005)Ionization constants for several simple amino acids have been measured for the first time under hydrothermal conditions, using visible spectroscopy with a high-temperature, high-pressure flow cell and thermally stable ...
-
(1987)Accurate values of ionization constants of water over a wide range of temperatures and pressures are needed for a quantitative description of the properties of hydrothermal ore-generating solutions. The ionization constants ...
Now showing items 9378-9397 of 43490