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Please use this identifier to cite or link to this item:
http://hdl.handle.net/2014/42733
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| Title: | Measuring isotope ratios across the solar system |
| Authors: | Webster, C. R.
Mahaffy, P. R. |
| Keywords: | planetary geophysical process
terrestrial planets |
| Issue Date: | 15-Oct-2012 |
| Publisher: | Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2012. |
| Citation: | International Workshop on Planetary Instruments, Greenbelt, Maryland, October 15, 2012, |
| Abstract: | Stable isotope ratios in C, H, N, O and S are powerful indicators of a wide variety of planetary geophysical processes that can identify origin, transport, temperature history, radiation exposure, atmospheric escape, environmental habitability and biology [1]. For the Allan Hills 84001 meteorite, for example, the ¹³C/¹²C ratio identifies it as a Mars (SNC) mete- orite; the ⁴⁰K/⁴⁰Ar ratio tells us the last time the rock cooled to solid, namely 4 Gya; isotope ratios in ³He, ²¹Ne and ³⁸Ar show it was in space (cosmic ray expo- sure) for 10-20 million years; ¹⁴C dating that it sat in Antarctica for 13,000 years before discovery; and clumped isotope analysis of ¹⁸O¹³C¹⁶O in its carbonate that it was formed at 18±4 ⁰C in a near-surface aqueous environment [2]. Solar System Formation |
| URI: | http://hdl.handle.net/2014/42733 |
| Appears in Collections: | JPL TRS 1992+
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