scholarly journals Isolation of Quartz Grains for Optically Stimulated Luminescence (OSL) Dating of Quaternary Sediments for Paleoenvironmental Research

10.3791/62706 ◽  
2021 ◽  
Author(s):  
Liliana C. Marin ◽  
Steven L. Forman ◽  
Victoria T. Todd ◽  
Connor Mayhack ◽  
Ashley Gonzalez ◽  
...  
Keyword(s):  
Optically Stimulated Luminescence ◽  
Osl Dating ◽  
Quaternary Sediments ◽  
Quartz Grains

scholarly journals Luminescence characteristics of quartz from Brazilian sediments and constraints for OSL dating

2013 ◽  
Vol 85 (4) ◽  
pp. 1303-1316 ◽  
Author(s):  
CARLOS C.F. GUEDES ◽  
ANDRE O. SAWAKUCHI ◽  
PAULO C.F. GIANNINI ◽  
REGINA DEWITT ◽  
VITOR A.P. AGUIAR
Keyword(s):  
Radiation Dose ◽  
Dose Distribution ◽  
Optically Stimulated Luminescence ◽  
Osl Dating ◽  
Northeastern Brazil ◽  
Southeastern Brazil ◽  
Dose Estimation ◽  
Shallow Marine ◽  
Luminescence Characteristics ◽  
Quartz Grains

This study analyzes the optically stimulated luminescence (OSL) characteristics of quartz grains from fluvial, eolian and shallow marine sands of northeastern and southeastern Brazil, with especial focus on the applicability of the single-aliquot regenerative dose (SAR) dating protocol. All analyzed Brazilian sediments presented relatively high OSL sensitivity and good behavior regarding their luminescence characteristics relevant for radiation dose estimation. However, some samples from the Lençóis Maranhenses region in northeastern Brazil showed inadequate OSL sensitivity correction, hampering the implementation of the SAR protocol and their ability to behave as a natural dosimeter. While the shallow marine and eolian samples showed a narrow and reliable dose distribution, the fluvial sample had a wide dose distribution, suggesting incomplete bleaching and natural doses estimates dependent on age models.

scholarly journals APPLICATION OF OSL METHOD IN DATING PAST EARTHQUAKES

2017 ◽  
Vol 50 (1) ◽  
pp. 392
Author(s):  
I. Tsodoulos ◽  
K.C. Stamoulis ◽  
C. Papachristodoulou ◽  
PS. Pavlides ◽  
K.G. Ioannides
Keyword(s):  
Late Quaternary ◽  
Optically Stimulated Luminescence ◽  
Osl Dating ◽  
Annual Dose ◽  
The North ◽  
North Eastern ◽  
Dating Method ◽  
Luminescence Characteristics ◽  
Radioactivity Measurements ◽  
Quartz Grains

The aim of this study was to establish a chronological frame of paleoseismic events  of Gyrtoni Fault, (Thessaly, Central Greece), with the use of OSL dating method. The Gyrtoni Fault, defines the north-eastern boundary of the Middle-Late Quaternary Tyrnavos Basin, and was previously investigated with geological methods. Twenty five fluvial-colluvial sediment and pottery samples were collected from two paleoseismological trenches, excavated along the Gyrtoni Fault, from both the upthrown and the downthrown fault blocks. Optically Stimulated Luminescence (OSL) dating was applied to coarse grain quartz using the single-aliquot regenerative-dose (SAR) protocol. Investigations of luminescence characteristics using various tests confirmed the suitability of the material for OSL dating using the SAR protocol. Radioactivity measurements were performed in order to estimate the annual dose rateof the surrounding soils to which the quartz grains were submitted during the burial period of the collected samples. The estimated OSL ages agreed well with the available stratigraphical data, and archaeological evidence. The occurrence of three surface faulting events in a time span between 1.42 ± 0.06 ka and 5.59 ± 0.13 ka was revealed while an earlier faulting event (fourth) was also recognized to be older than 5.59 ± 0.13 ka.

Optically Stimulated Luminescence (OSL) dating of glacial sediments from Arctic Russia - depositional bleaching and methodological aspects

Boreas ◽  
2006 ◽  
Vol 35 (3) ◽  
pp. 587-599 ◽  
Author(s):  
PUTHUSSERRY J. THOMAS ◽  
ANDREW S. MURRAY ◽  
KURT H. KJaeR ◽  
SVEND FUNDER ◽  
EILIV LARSEN
Keyword(s):  
Optically Stimulated Luminescence ◽  
Osl Dating ◽  
Glacial Sediments ◽  
Methodological Aspects ◽  
Arctic Russia

scholarly journals Towards an improvement of optically stimulated luminescence (OSL) age uncertainties: modelling OSL ages with systematic errors, stratigraphic constraints and radiocarbon ages using the R package BayLum

Geochronology ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 229-245
Author(s):  
Guillaume Guérin ◽  
Christelle Lahaye ◽  
Maryam Heydari ◽  
Martin Autzen ◽  
Jan-Pieter Buylaert ◽  
...  
Keyword(s):  
R Package ◽  
Systematic Errors ◽  
Covariance Matrices ◽  
Optically Stimulated Luminescence ◽  
Osl Dating ◽  
Dose Rates ◽  
Determination Procedure ◽  
Single Grain ◽  
Measurement Uncertainties ◽  
Osl Age

Abstract. Statistical analysis has become increasingly important in optically stimulated luminescence (OSL) dating since it has become possible to measure signals at the single-grain scale. The accuracy of large chronological datasets can benefit from the inclusion, in chronological modelling, of stratigraphic constraints and shared systematic errors. Recently, a number of Bayesian models have been developed for OSL age calculation; the R package “BayLum” presented herein allows different models of this type to be implemented, particularly for samples in stratigraphic order which share systematic errors. We first show how to introduce stratigraphic constraints in BayLum; then, we focus on the construction, based on measurement uncertainties, of dose covariance matrices to account for systematic errors specific to OSL dating. The nature (systematic versus random) of errors affecting OSL ages is discussed, based – as an example – on the dose rate determination procedure at the IRAMAT-CRP2A laboratory (Bordeaux). The effects of the stratigraphic constraints and dose covariance matrices are illustrated on example datasets. In particular, the benefit of combining the modelling of systematic errors with independent ages, unaffected by these errors, is demonstrated. Finally, we discuss other common ways of estimating dose rates and how they may be taken into account in the covariance matrix by other potential users and laboratories. Test datasets are provided as a Supplement to the reader, together with an R markdown tutorial allowing the reproduction of all calculations and figures presented in this study.

scholarly journals Use of the Optically Stimulated Luminescence Dating and X-Ray Fluorescence Spectrometry Methods as Tools in Paleoseismology

2019 ◽  
Vol 22 ◽  
pp. 107
Author(s):  
L. M. Tsodoulos ◽  
K. Stamoulis ◽  
C. A. Papachristodoulou ◽  
K. G. Ioannides ◽  
S. Pavlides
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Optically Stimulated Luminescence ◽  
Osl Dating ◽  
Luminescence Dating ◽  
Alluvial Deposits ◽  
X Ray ◽  
Fault Block ◽  
Optically Stimulated Luminescence Dating ◽  
Dating Method

We have investigated the application of luminescence dating to sediment and pottery samples from a paleoseismological trench excavated in the Gyrtoni Fault, Tyrnavos Basin, Central Greece. The samples were dated following the optically stimulated luminescence (OSL) dating method, using the Riso TL/OSL DA-20 reader. The OSL ages were obtained from chemically purified quartz and a single-aliquot regenerative-dose (SAR) protocol was followed for the equivalent dose (De) determination. Additionally, samples were collected and analyzed with the method of X-ray Fluorescence (XRF) spectrometry, in order to assess their elemental composition. Radioisotope sources (109Cd and 241Am) were used for sample excitation, while X-ray spectra were acquired using a Si(Li) detector coupled with standard electronics. The XRF data were submitted to principal component analysis (PCA). This statistical handling aimed to distinguish from which part of the upthrown fault block scarp-derived colluvium and alluvial deposits, parts of the downthrown block were derived and thus estimate the displacement. The results indicated that both the OSL dating method and the XRF analysis combined with PCA can serve as useful tools for paleoseismological investigations.

Optical dating of late Quaternary carbonate sequences of Saurashtra, western India

2017 ◽  
Vol 87 (1) ◽  
pp. 133-150 ◽  
Author(s):  
Komal Sharma ◽  
Nilesh Bhatt ◽  
Anil Dutt Shukla ◽  
Dae-Kyo Cheong ◽  
Ashok Kumar Singhvi
Keyword(s):  
Late Quaternary ◽  
Optically Stimulated Luminescence ◽  
Western India ◽  
Carbonate Sediments ◽  
Sampling Strategies ◽  
Aeolian Processes ◽  
Saurashtra Coast ◽  
Recent Deposition ◽  
Quartz Grains ◽  
Carbonate Deposits

AbstractBioclastic carbonate deposits that formed because of a combination of nearshore marine, fluvial, and aeolian processes, occur along the Saurashtra coast and in the adjacent interior regions of western India. Whether these carbonates formed by marine or aeolian processes has been debated for many decades. The presence of these deposits inland poses questions as to whether they are climate controlled or attributable to postdepositional tectonic uplift. In particular, the debate centres on chronologic issues including (1) appropriate sampling strategies and (2) the use of 230Th/234U and 14C ages on the bulk carbonates. Using traces (<1%) of quartz grains trapped in carbonate matrices, optically stimulated luminescence (OSL) dating of quartz grains, deposited along with the carbonate grains, provides ages for the most recent deposition events. The OSL ages range from >165 to 44 ka for the shell limestones, 75–17 ka for the fluvially reworked sheet deposits, and 80–11 ka for miliolites deposited by aeolian processes. These are younger than the 230Th/234U and 14C ages and suggest that the inland carbonate deposits were reworked from older carbonate sediments that were transported during more arid phases.

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