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

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 sedimentar...

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Veröffentlicht in:Radiation measurements Jg. 41; H. 7; S. 755 - 761
Hauptverfasser: Jain, M., Andersen, C.E., Bøtter-Jensen, L., Murray, A.S., Haack, H., Bridges, J.C.
Format: Journal Article Tagungsbericht
Sprache:Englisch
Veröffentlicht: Oxford Elsevier Ltd 01.08.2006
Elsevier
Schlagworte:
Anomalous fading
Cosmochemistry. Extraterrestrial geology
Earth sciences
Earth, ocean, space
Exact sciences and technology
Extraterrestrial geology
Galactic cosmic rays
Geochronology
Isotope geochemistry. Geochronology
Luminescence dating
Mars
Proton dosimetery
Solar UV spectra
Mars
Anomalous fading
Luminescence dating
Proton dosimetery
Solar UV spectra
Galactic cosmic rays
chain silicates
radiation damage
chronology
ultraviolet rays
feldspar
olivine
sulfates
pyroxene
silicates
dating
framework silicates
particles
chlorides
nesosilicates
OSL
solar radiation
transport
plagioclase
halides
traps
cosmic rays
materials
protons
ISSN:1350-4487, 1879-0925
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Zusammenfassung: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 (200–300 nm) 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 Al 2 O 3 : 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.
ISSN:1350-4487
1879-0925
DOI:10.1016/j.radmeas.2006.05.018