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Thermochronometry using red TL of quartz? - Numerical simulation and observations from in-situ drill-hole samples

Title data

Schmidt, Christoph ; Friedrich, Johannes ; Zöller, Ludwig:
Thermochronometry using red TL of quartz? - Numerical simulation and observations from in-situ drill-hole samples.
University of Bayreuth
In: Radiation Measurements. Vol. 81 (2015) . - pp. 98-103.
ISSN 1350-4487
DOI: https://doi.org/10.1016/j.radmeas.2015.04.004

Official URL: Volltext

Project information

Project financing: Andere
Oberfrankenstiftung: Niedrigst-Temperatur-Thermochronometrie mittels Thermolumineszenz (Thermalbohrung Weißenstadt)

Abstract in another language

As the lifetime of trapped charge in meta-stable states in natural crystals is a function of ambient temperature, the trapped charge concentration e measured for example by ESR or luminescence methods e should contain information on a rock's thermal history. Experiments and modelling, however, confirm that quartz OSL saturates at dose levels too low to be used for thermochronometry in mountain ranges other than tectonically very active Alpine orogens. That is why we propose red TL (RTL) of quartz as a geothermometer that saturates at doses one to two orders of magnitude higher than OSL.
We compare numerical simulations of TL glow curves as would be expected at different depths below surface with RTL measurements obtained for samples from a recent drill-hole in the granitic basement of the Variscan Fichtelgebirge (Germany). Natural TL glow curves document gradual thermal erosion of the high temperature (>300 °C) TL with increasing ambient temperature. Moreover, additive RTL dose response of these samples indicates that signals are not in field saturation for ambient temperatures as low as 25 °C, most probably for even lower temperatures. The sample collected near the surface showed an uncommon dose response behaviour.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Luminescence; Quartz; Red thermoluminescence; Thermochronology
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Chair Geomorphology - Univ.-Prof. Dr. Ludwig Zöller
Profile Fields > Advanced Fields > Ecology and the Environmental Sciences
Profile Fields > Advanced Fields > Nonlinear Dynamics
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Geomorphology
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 550 Earth sciences, geology
Date Deposited: 18 Nov 2015 09:58
Last Modified: 18 Nov 2015 09:58
URI: https://eref.uni-bayreuth.de/id/eprint/22584