In situ geochronology as a mission-enabling technology

M. Coleman, M. Hecht, J. Hurowitz, E. Neidholdt, J. Polk, M. P. Sinha, W. Sturhahn, W. Zimmerman
2012 2012 IEEE Aerospace Conference  
Although there are excellent estimates of ages of terrains on Mars from crater counting, even a few absolute ages would serve to validate the calibration. Results with uncertainties, although much larger than those that could be achieved in labs on Earth, would be extremely valuable. While there are other possibilities for in situ geochronology instruments, we describe here two alternative technologies, being developed in JPL. There are two common features of both. The first is analysis by
more » ... of miniature mass spectrometer. The second is use of laser sampling to reduce or avoid sample handling, preparation and pre-treatment and equally importantly, to allow analysis of individual, texturally resolved minerals in coarse-grained rocks. This textural resolution will aid in selection of grains more or less enriched in the relevant elements and allow construction of isochrons for more precise dating. Either of these instruments could enable missions to Mars and other planetary bodies.
doi:10.1109/aero.2012.6187053 fatcat:7z6cy5ufznd7dbrnegcnrdy5cy