Dose recovery with plagioclase and pyroxene samples as surrogates for Martian surface sediments

摘要

One question for Mars exploration is the climatic history of this intriguing planet. In this context, efforts are made to create a miniature dating device for in situ luminescence dating of Martian sediments. The goal of our study was to develop a protocol, based on the SAR procedure, for natural-dose measurement with plagioclase (andesine, labradorite, bytownite) and pyroxene (augite and diopside) samples as surrogates for Martian sediments. Experiments were carried out with IR and blue stimulation, the UV signal was detected. Best results for dose recovery were obtained with a 210 degrees C preheat and cutheat temperature, IR stimulation at 60 degrees C, and OSL readout at 150 degrees C. A 1600 Gy laboratory dose could be recovered with 6.1% uncertainty using the IR-stimulated luminescence signal and 4.0% for the blue-stimulated luminescence signal from the post-IR blue procedure. (c) 2005 Elsevier Ltd. All rights reserved.