Mass-Independent Isotope Effects in Planetary Atmospheres and the Early Solar System
- 15 January 1999
- journal article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 283 (5400) , 341-345
- https://doi.org/10.1126/science.283.5400.341
Abstract
A class of isotope effects that alters isotope ratios on a mass-independent basis provides a tool for studying a wide range of processes in atmospheres of Earth and other planets as well as early processes in the solar nebula. The mechanism for the effect remains uncertain. Mass-independent isotopic compositions have been observed in O3, CO2, N2O, and CO in Earth's atmosphere and in carbonate from a martian meteorite, which suggests a role for mass-independent processes in the atmosphere of Mars. Observed mass-independent meteoritic oxygen and sulfur isotopic compositions may derive from chemical processes in the presolar nebula, and their distributions could provide insight into early solar system evolution.Keywords
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