Luminescence dating on Mars: OSL characteristics of Martian analogue materials and GCR dosimetry

被引：33
作者：
Jain, M. [1 ]
Andersen, C. E.
Botter-Jensen, L.
Murray, A. S.
Haack, H.
Bridges, J. C.
机构：
[1] Riso Natl Lab, DK-4000 Roskilde, Denmark
[2] Univ Aarhus, Dept Earth Sci, Nordic Lab Luminescence Dating, Riso Natl Lab, DK-4000 Roskilde, Denmark
[3] Univ Copenhagen, Geol Museum, DK-1350 Copenhagen K, Denmark
[4] Open Univ, PSSRI, Milton Keynes MK7 6AA, Bucks, England
[5] Nat Hist Museum, Dept Mineral, London SW7 5BD, England
来源：
RADIATION MEASUREMENTS | 2006年 / 41卷 / 7-8期
关键词：
Mars; luminescence dating; galactic cosmic rays; anomalous fading; solar UV spectra; proton dosimetery;
D O I：
10.1016/j.radmeas.2006.05.018
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Luminescence chronology may be the key to understanding climatically and tectonically driven changes on Mars. However, the success of Martian luminescence dating will depend upon our understanding of the luminescence properties of silicates such as olivine, pyroxenes and plagioclases, and sedimentary precipitates such as sulphates and chlorides. We present here a preliminary investigation of the luminescence characteristics (sensitivity, dose response, fading) of some Martian analogue mineral and rock samples. These materials are likely to be zeroed by the solar UV light (200-300nm) under sub-aerial transport; this may allow possibility of using deep traps for extending the age range on Mars. Dose rates on Mars are largely due to charged particles present in the galactic cosmic rays. Some new results on proton dosimetry with Al2O3:C (Bragg curve and luminescence efficiency as a function of LET), and the effect of radiation damage due to cosmic ray exposure are presented and implications discussed for Martian luminescence dating. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：755 / 761
页数：7
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