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TL estimation of paleodose of dune-sand quartz

Franklin, A.D. ; Hornyak, W.F. ; Dickerson, W.

Quaternary science reviews, 1992, Vol.11 (1), p.75-78 [Periódico revisado por pares]

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Título:
TL estimation of paleodose of dune-sand quartz
Autor: Franklin, A.D. ; Hornyak, W.F. ; Dickerson, W.
Assuntos: Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Geochronology ; Geography, Physical ; Geology ; Geosciences, Multidisciplinary ; Isotope geochemistry. Geochronology ; Physical Geography ; Physical Sciences ; Science & Technology
É parte de: Quaternary science reviews, 1992, Vol.11 (1), p.75-78
Descrição: Archeological quartz exhibits two major TL peaks. At a ramp rate of 1°C/sec one (RBP) occurs at ∼380 nm and ∼290°C and bleaches very rapidly when exposed to light across the visible spectrum. The other (SBP) occurs at ∼480 nm, at ∼330°C and bleaches, when exposed to UV light, much more slowly. The 290°C peak can be isolated using a UV filter (e.g. Schott UG11) and a subtraction technique, and can be used to estimate the paleodose with the regeneration method. The 330°C peak can be isolated with a green (e.g. Chance OGr1) or yellow (e.g. Schott GG-475) filter and might be used to estimate the paleodose with the R-F technique. Measurements of first and second (after optical bleaching) glow growth curves suggest the SBP may not conform to the assumptions of the R-F method, and use of the RBP may require at least approximate reproduction of the solar exposure at the time of burial.
Editor: OXFORD: Elsevier Ltd
Idioma: Inglês

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