osl quartz from feldspars

Feldspar, Infrared-Stimulated Luminescence | SpringerLink

Feldspar is a dominant (~60 %) rock-forming mineral group in the Earth's crust. Plagioclase feldspars (NaAlSi 3 O 8 –CaAl 2 Si 2 O 8) are also commonly observed in meteorite samples and are a major mineral constituent on the surface of other extraterrestrial bodies such as the Moon and Mars.In luminescence dating, K-feldspar (KAlSi 3 O 8) is the most commonly used dosimeter after quartz.

TIME-RESOLVED OPTICALLY STIMULATED LUMINESCENCE …

time-resolved optically stimulated luminescence (osl) studies on samples containing quartz and feldspar a thesis submitted to the graduate school of natural and applied sciences of middle east technical university by aydan yeltİk in partial fulfillment of the requirements for the degree of master of science in physics september 2009

Experimental and modelling study of time-resolved ...

in the pulsed-OSL signals from quartz and feldspars when dealing with either mixed quartzfeldspar mineral samples or in the case of quartz contaminated with feldspars. These authors suggested a technique of gating the counting period, to significantly reduce the feldspar signal relative to the signal from quartz.

Optically Stimulated Luminescence - Antarctic Glaciers

Recent advances in OSL dating techniques for feldspar 2, 3 may result in this becoming the preferred mineral for OSL dating of glacial sediments, although feldspars are often more severely affected by partial bleaching than quartz.

Luminescence dating - Wikipedia

Optical dating using Optically stimulated luminescence (OSL) was developed in 1984 by David Huntley and colleagues. Hütt et al. laid the groundwork for the infrared stimulated luminescence (IRSL) dating of potassium feldspars in 1988.

Minimizing feldspar OSL contamination in quartz UV-OSL ...

(iv) Feldspars suffer lengths is often used in an attempt to achieve a clean quartz OSL signal. However, a blue-stimulated feldspar OSL signal remains even after IR exposure; this can significantly interfere with the ∗ Corresponding author.

Monte Carlo simulations of TL and OSL in nanodosimetric ...

Monte Carlo simulations of TL and OSL in nanodosimetric materials and feldspars Vasilis Pagonis a, *, Reuven Chen b a Physics Department, McDaniel College, Westminster, MD 21157, USA b Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv 69978, Israel highlights A simplified Monte Carlo method for TL and OSL in nanodosimetric materials.

LUMINESCENCE AGES OF FELDSPAR CONTAMINATED …

Keywords: OSL dating, feldspar, quartz, terrace sediments, SAR dose protocol. 1. INTRODUCTION The single aliquot regenerative dose (SAR) protocol (Murray and Wintle, 2000), as a sequence of measure-ments, uses the initial part of the OSL signal from quartz or feldspar grains in dating studies. Quartz …

Comparison of paired quartz OSL and feldspar post-IR IRSL ...

Saturation of the quartz OSL signal may limit the ability to obtain older ages (e.g. Chapot et al., 2012), therefore we need to consider a different luminescence chronometer. Feldspars have been suggested as a dosimeter that can be used to extend luminescence dating beyond the range covered by quartz OSL (e.g. Buylaert et al., 2012).

Isochron dating of sediments using luminescence of K ...

the TL signal of quartz and feldspars. For Holocene deposits, OSL dating has been applied to quartz grains from the fossil dunes in the Hulun Buir Desert [Li and Sun, 2006] and the Hunshundake Desert [Li et al., 2002], north of Beijing. However, the dating of earlier deposits is limited by the saturation of the quartz OSL signal with increasing

Thermal effects in the optically stimulated luminescence ...

Thermal effects in the optically stimulated luminescence of quartz and mixed feldspars from sediments. D I Godfrey-Smith. Journal of Physics D: Applied Physics ... Anglesey, North Wales as determined by OSL dating of quartz Bailey S.D et al 2001 Quaternary Science Reviews 20 701 Crossref.

[PDF] Optical Dating Of Quartz From Young Deposits From ...

single grain optically stimulated luminescence osl dating is a tool used in quaternary optical dating of ... assessing ages of depositional mineral grains such as quartz feldspars and zircons this work aims to ... years dating of deposits as young as one year to several hundred thousand years namely the quartz osl.

Effects of Feldspar Contamination on Equivalent dose and ...

(3) For multiple-mineral aliquot the growth curve shape of the post-IR BLSL is different from that of the IRSL, and within 25 Gy it is identical to that of the pure quartz BLSL. The contamination of feldspars in quartz will change the shape of a growth curve for quartz BLSL.

Use of Minerals other than Quartz and Feldspars for ...

Use of Minerals other than Quartz and Feldspars for Luminescence Dating David Strebler Wolfson College University of Oxford Preset essay submitted for the degree of M.St. in archaeological science Trinity 2013 Abstract Nowadays, Luminescence process in quartz and feldspar are well under- stood.

Study of sensitivity change of OSL signals from quartz and ...

N2 - Optically stimulated luminescence (OSL) signals from feldspar and quartz samples were studied using infrared (860 nm) and green light (420-575 nm) stimulation. A serious problem connected with the regeneration technique used for dating is associated with a change of OSL sensitivity to radiation in the couse of the measurement process.

Assessing the uncertainty on particle size and shape ...

OSL dating Quartz Feldspar grains Size Shape Beta dose attenuations abstract Grain size and shape are two important parameters in Electron Spin Resonance (ESR) and Optically Stimulated Luminescence (OSL) dating of sediment, since they have a direct impact on several correction factors that are used for evaluating the dose rate.

Feldspar - Wikipedia

Feldspars crystallize from magma as veins in both intrusive and extrusive igneous rocks and are also present in many types of metamorphic rock. Rock formed almost entirely of calcic plagioclase feldspar (see below) is known as anorthosite. Feldspars are also found in many types of sedimentary rocks.

Optically Stimulated Luminescence Dosimetry - L. Boetter ...

The OSL properties of the two most important natural OSL dosimetry material types, namely quartz and feldspars are discussed in depth. The applications chapters deal with the use of OSL in personal, environmental, medical and UV dosimetry, geological dating and retrospective dosimetry (accident dosimetry and dating).

Comparison of paired quartz OSL and feldspar post-IR IRSL ...

OSL signal may limit the ability to obtain older ages (e.g. Chapot et al., 2012), therefore we need to consider a different luminescence chronometer. Feldspars have been suggested as a dosimeter that can be used to extend luminescence dating beyond the rangecoveredby quartz OSL (e.g. Buylaert et al., 2012). The post-infrared infrared stimu-

Effects of Feldspar Contamination on Equivalent dose and ...

Effects of Feldspar Contamination on Equivalent dose and the Shape of Growth Curve for OSL of Silt-Sized Quartz Extracted from Chinese Loess. This study examines the effects of feldspar contamination of different extent (by fluorosilicic acid etching for different time periods and mixing pure quartz with different percentage of unetched grains) on blue-light stimulated luminescence (BLSL) of ...

A SIMPLE METHOD TO SEPARATE QUARTZ AND FELDSPAR …

source, quartz shows luminescence emission during OSL and TL measurements, however, very weakly under IRSL stimulation; feldspars show emission under all three kinds of stimulation. The thermoluminescence signal may be assigned to quartz or feldspars because those minerals differ in temperatures at which emission occurs. The

Feldspar, Infrared-Stimulated Luminescence - Springer

Feldspar, Infrared-Stimulated Luminescence Mayank Jain* Center for Nuclear Technologies, Technical University of Denmark, DTU Risø Campus, Roskilde, Denmark Definition This entry primarily concerns the characteristics and the origins of infrared-stimulated lumines-cence in feldspars…

Laboratory fading rates of various luminescence signals ...

However, feldspars have one major disadvantage; both the thermoluminescence (TL) and optically stimulated luminescence (OSL) signals exhibit anomalous (athermal) fading. Much of the OSL work carried out on feldspars in recent years has focussed on …

Open Access Discussions Open Access Potential and limits ...

methods applied on a Middle Pleistocene sediment record of Lake El'gygytgyn, Russia A. Zander and A. Hilgers ... the use of quartz for OSL dating is typically limited to the last 100–150ka be-cause of saturation effects of the quartz luminescence signal with increasing dose. ... nated by a mixture of quartz, feldspars (K-feldspar and pla ...