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Kinetic and equilibrium mass-dependent isotope fractionation laws in nature and their geochemical and cosmochemical significance
Abstract The mass-dependent fractionation laws that describe the partitioning of isotopes are different for kinetic and equilibrium reactions. These laws are characterized by the exponent relatingExpand
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The Isotope Geochemistry and Cosmochemistry of Magnesium
Magnesium is second only to oxygen in abundance among the rock-forming elements and is an important element in the oceans and in hydrological and biological systems. Differences in the relativeExpand
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Constraints on Hadean zircon protoliths from oxygen isotopes, Ti‐thermometry, and rare earth elements
[1] We report zircon oxygen isotope ratios and reconnaissance Ti-in-zircon concentrations, guided by cathodoluminescence image studies, for detrital zircons up to 4.34 Ga from the Narryer GneissExpand
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The formation of chondrules at high gas pressures in the solar nebula.
High-precision magnesium isotope measurements of whole chondrules from the Allende carbonaceous chondrite meteorite show that some aluminum-rich Allende chondrules formed at or near the time ofExpand
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Equilibrium high-temperature Fe isotope fractionation between fayalite and magnetite: An experimental calibration
Abstract The iron isotopic fractionation factor between magnetite and fayalite was measured at high temperature in a piston–cylinder apparatus. For the first time, the three-isotope methodExpand
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Spinel–olivine magnesium isotope thermometry in the mantle and implications for the Mg isotopic composition of Earth
article The magnesium isotopic composition of Earth is not yet well constrained despite significant advances in methods for measuring Mg isotope ratios in rocks. One impediment to establishing 25 Mg/Expand
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Metal-silicate silicon isotope fractionation in enstatite meteorites and constraints on Earth's core formation
article Silicon has long been considered a possible light element in Earth's core. If differences in 30 Si/ 28 Si ratios between metal (core) and silicate (mantle and crust) can be quantified,Expand
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Carbon isotope stratigraphy of the Precambrian-Cambrian Sukharikha River section, northwestern Siberian platform
A high-resolution carbon isotope profile through the uppermost Neoproterozoic-Lower Cambrian part of the Sukharikha section at the northwestern margin of the Siberian platform shows prominent seculExpand
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Comet 81P/Wild 2 Under a Microscope
The Stardust spacecraft collected thousands of particles from comet 81P/Wild 2 and returned them to Earth for laboratory study. The preliminary examination of these samples shows that the nonvolatileExpand
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Oxygen isotopic evidence for vigorous mixing during the Moon-forming giant impact
Rehomogenizing the Earth-Moon system A giant impact formed the Moon, and lunar rocks provide insight into that process. Young et al. found that rocks on Earth and the Moon have identical oxygenExpand
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