Evaluating copper isotope fractionation in the metallurgical operational chain: An experimental approach

Experimental Evidence for Isotope Fractionation during Planetary

DIFFERENTIATION. A. Shahar K. Ziegler, E. D. Young, A. Ricolleau, C. A. Macris, E. A. Schauble and Y. Fei, Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Rd. NW, Washington D.C. 20015, [email protected], Institute of Geophysics and Space Physics, UCLA, 603 Charles Young Drive East, Los Angeles, CA, 90095, Department of Earth and Space Sciences, UCLA, 595 Charles You...

Experimental Determination of Silicon Isotope Fractionation in Rice

Analyzing variations in silicon (Si) isotopes can help elucidate the biogeochemical Si cycle and Si accumulation processes of higher plants. Importantly, the composition of Si isotopes in higher plants has yet to be studied comprehensively and our knowledge of the distribution of Si isotopes in higher plants lags behind that of Si isotopes in marine organisms, such as diatoms. In the present st...

15N isotope fractionation in an aquatic food chain: Bellamya aeruginosa (Reeve) as an algal control agent.

15N isotope tracer techniques and ecological modeling were adopted to investigate the fractionation of nitrogen, its uptake and transformation in algae and snail (Bellamya aeruginosa Reeve). Different algal species were found to differ in their uptake of nitrogen isotopes. Microcystis aeruginisa Kütz. demonstrated the greatest 15N accumulation capacity, with the natural variation in isotopic ra...

Isotope Effects, Isotope Separation and Isotope Fractionation

Experimental calibration of oxygen isotope fractionation between quartz and zircon

We report the results of an experimental calibration of oxygen isotope fractionation between quartz and zircon. Data were collected from 700 to 1000 C, 10–20 kbar, and in some experiments the oxygen fugacity was buffered at the fayalite–magnetite–quartz equilibrium. Oxygen isotope fractionation shows no clear dependence on oxygen fugacity or pressure. Unexpectedly, some high-temperature data (9...