DRAC: Dose Rate and Age Calculator for trapped charge dating

Durcan, Julie A.; King, Georgina E.; Duller, G.A.T.

doi:10.1016/j.quageo.2015.03.012

Cited by 526 publications

(278 citation statements)

References 61 publications

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“…All OSL ages were calculated using the Dose Rate and Age Calculator (DRAC) computer program written by Durcan et al . [], incorporating the radionuclide dose rate conversion factors of Liritzis et al . [], alpha grain size attenuation factors of Brennan et al .…”

Section: Methodsmentioning

confidence: 99%

Spatial slip behavior of large strike‐slip fault belts: Implications for the Holocene slip rates of the eastern termination of the North Anatolian Fault, Turkey

et al. 2015

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We present new data on Holocene slip rates for the eastern end of the North Anatolian Fault (NAF) by using the optically stimulated luminescence ages of the offset terrace deposits at two sites, where a total of four displaced landforms was studied. Each offset feature was analyzed independently, and three different assumptions were made for all the offsets, depending on whether the age of the upper tread (upper tread reconstruction), the lower tread (lower tread reconstruction), or all bounding surfaces (intermediate solution) were used in dating of the terrace risers. The deflected geometry of the risers strongly suggests the use of either the intermediate solution or the upper tread reconstruction. The joint slip rate distributions for the upper tread reconstructions and the intermediate solutions were modeled as 13.0 + 1.8 / −1.4 and 14.3 + 5.8 / −2.4 mm/yr (2σ), respectively. Although the intermediate solution covers the full range of ages for the measured displacements, the curved geometry of the terrace risers suggests that the initiations of the riser offsets are most probably close to the abandonment ages of the upper terrace treads. Therefore, we accepted the joint slip rate of the intermediate solution but suggested that the average rate for the main displacement zone of the eastern NAF should be close to its lower limits. This slower rate with respect to previous estimates suggests that the total deformation is not only accommodated on the main displacement zone but is also distributed along the secondary faults to the south of the easternmost segments of the NAF.

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Section: Methodsmentioning

confidence: 99%

Spatial slip behavior of large strike‐slip fault belts: Implications for the Holocene slip rates of the eastern termination of the North Anatolian Fault, Turkey

et al. 2015

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“…Samples were pipetted on 9.8mm steel discs and measured on a Risø TL/OSL reader with a 90 Sr/ 90 Y beta source delivering~0.13 Gy at the sample position. Dose rate and age calculation were performed using the DRAC software (Durcan et al 2015), whereas the dosimetry was based on radionuclide concentrations (uranium, thorium, potassium) in the surrounding sediment derived from high-resolution gamma spectrometry measured at the CLL and the VKTA Rossendorf, and in-situ water contents (for more details on OSL methodology see Data S1). Equivalent dose measurements were performed using a SAR protocol (Murray & Wintle 2003) with 10 s preheat at 220°C and a cutheat at 200°C.…”

Section: Sample Idmentioning

confidence: 99%

Deglaciation history of Lake Ladoga (northwestern Russia) based on varved sediments

Gromig

Wagner

Wennrich

et al. 2019

Boreas

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Lake Ladoga in northwestern Russia is Europe's largest lake. The postglacial historyof the Ladogabasin is for the first time documented continuously with high temporal resolution in the upper 13.3 m of a sediment core (Co1309) from the northwestern part of the lake. We applied a multiproxy approach including radiographic imaging, (bio-) geochemical and granulometric analyses. Age control was established combining radiocarbon dating with varve chronology, the latter anchored to a correlated radiocarbon age from a lake close by. The age-depth model reveals the onset of glacial varve sedimentation at 13 910AE140 cal. a BP, when Lake Ladoga was part of the Baltic Ice Lake. Linear extrapolation of published retreat rates of the Scandinavian Ice Sheet provides a formation age of the Luga moraine close to Lake Ladoga's southern shore of 14.5-15.9 cal. ka BP, older than previously assumed. Varve sedimentation covers the Bølling/Allerød interstadial, the Younger Dryas stadial and the Early Holocene. Varvethickness variations, conjoined with grain-size and geochemical variations, inform about the relative position of the Scandinavian Ice Sheet and the climate during the deglaciation phase. The upper limit of the varved succession marks the change from glaciolacustrine to normal lacustrine sedimentation and post-dates the drainage of the Baltic Ice Lake aswell as the formation of the Salpausselk€ a II moraine north of Lake Ladoga, by c. 250 years. The Holocene sediment record is divided into three periods in the following order: (i) a lower transition zone between the Holocene boundary and c. 9.5 cal. ka BP, characterized by mostly massive sediments with low organic content, (ii) a phase with increased organic content from c. 9.5 to 4.5 cal. ka BP corresponding to the Holocene Thermal Maximum, and (iii) a phase with relatively stable sedimentation in a lacustrine environment from c. 4.5 cal. ka BP until present.

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“…After a resting period of four weeks to compensate for radon emanation during pretreatment, radionuclide concentrations were measured on a high-purity germanium gamma-ray spectrometer. The dose rates and ages were calculated using DRAC, v.1.2 (Durcan et al, 2015). Conversion factors of Guerin et al (2011) and the measured water content (W) were included.…”

Section: Dose Rate Measurementsmentioning

confidence: 99%

New luminescence-based geochronology framing the last two glacial cycles at the southern limit of European Pleistocene loess in Stalać (Serbia)

et al. 2017

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Abstract:A new geochronology was established for the Stalać loess-paleosol sequence (LPS) in Serbia. The section is located in the interior of the Central Balkan region, south of the typical loess distribution, in a zone of paleoclimatic shifts between continental and Mediterranean climate regimes. The sampled sequence contains four well-developed paleosol and loess layers, a crypto tephra and one visible tephra layer. Optically stimulated luminescence measurements showed a strong dependency of preheat temperature on equivalent dose for one fine-grained quartz sample, which makes it unsuitable for dating. A firm chronology framing the last two glacial cycles was established using finegrained polyminerals and the post-infrared infrared stimulated luminescence (pIR 50 IR 290 ) protocol instead. The characteristics of dated paleosols indicate similar climatic conditions during the last interstadial and interglacial phases, which were different from the penultimate interglacial period. The tephra within the L2 loess, probably related to tephra layers also found in other sections in Southeastern Europe, was sandwich-dated. The results indicate an age between 118 ka and 141 ka. Furthermore, a weak pedogenic layer dated to between 126 ka and 148 ka gives a first numerical age to this soil formation in Southeastern Europe.

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DRAC: Dose Rate and Age Calculator for trapped charge dating

Cited by 526 publications

References 61 publications

Spatial slip behavior of large strike‐slip fault belts: Implications for the Holocene slip rates of the eastern termination of the North Anatolian Fault, Turkey

Spatial slip behavior of large strike‐slip fault belts: Implications for the Holocene slip rates of the eastern termination of the North Anatolian Fault, Turkey

Deglaciation history of Lake Ladoga (northwestern Russia) based on varved sediments

New luminescence-based geochronology framing the last two glacial cycles at the southern limit of European Pleistocene loess in Stalać (Serbia)

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