Thermoluminescence Dating: Beta‐dose Attenuation in Quartz Grains

Mejdahl, V.

doi:10.1111/j.1475-4754.1979.tb00241.x

Cited by 828 publications

(414 citation statements)

References 15 publications

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“…These concentrations are used to estimate an environmental dose rate from the gamma and beta components of the decay chains for 40 K, 232 Th, 238 U, using the attenuation factors estimated by Adamiec & Aitken (1998), with corrections for water content (Zimmerman 1971) and grain size Mejdahl (1979). We estimate a cosmic ray dose rate based on data reported by Prescott & Hutton (1994), accounting for the geomagnetic latitude and elevation along with the density and thickness of the overburden.…”

Section: A P P E N D I X a : O P T I C A L Ly S T I M U L At E D L U mentioning

confidence: 99%

Seismotectonics and rupture process of theM_W 7.1 2011 Van reverse-faulting earthquake, eastern Turkey, and implications for hazard in regions of distributed shortening

Mackenzie¹,

Elliott²,

Altunel

et al. 2016

Geophys. J. Int.

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S U M M A R YThe 2011 October 23 M W 7.1 Van earthquake in eastern Turkey caused ∼600 deaths and caused widespread damage and economic loss. The seismogenic rupture was restricted to 10-25 km in depth, but aseismic surface creep, coincident with outcrop fault exposures, was observed in the hours to months after the earthquake. We combine observations from radar interferometry, seismology, geomorphology and Quaternary dating to investigate the geological slip rate and seismotectonic context of the Van earthquake, and assess the implications for continuing seismic hazard in the region. Transient post-seismic slip on the upper Van fault started immediately following the earthquake, and decayed over a period of weeks; it may not fully account for our long-term surface slip-rate estimate of ≥0.5 mm yr −1 . Post-seismic slip on the Bostaniçi splay fault initiated several days to weeks after the main shock, and we infer that it may have followed the M W 5.9 aftershock on the 9th November. The Van earthquake shows that updip segmentation can be important in arresting seismic ruptures on dip-slip faults. Two large, shallow aftershocks show that the upper 10 km of crust can sustain significant earthquakes, and significant slip is observed to have reached the surface in the late Quaternary, so there may be a continuing seismic hazard from the upper Van fault and the associated splay. The wavelength of folding in the hanging wall of the Van fault is dominated by the structure in the upper 10 km of the crust, masking the effect of deeper seismogenic structures. Thus, models of subsurface faulting based solely on surface folding and faulting in regions of reverse faulting may underestimate the full depth extent of seismogenic structures in the region. In measuring the cumulative post-seismic offsets to anthropogenic structures, we show that Structure-from-Motion can be rapidly deployed to create snapshots of postseismic displacement. We also demonstrate the utility of declassified Corona mission imagery (1960s-1970s) for geomorphic mapping in areas where recent urbanization has concealed the geomorphic markers.

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Section: A P P E N D I X a : O P T I C A L Ly S T I M U L At E D L U mentioning

confidence: 99%

Seismotectonics and rupture process of theM_W 7.1 2011 Van reverse-faulting earthquake, eastern Turkey, and implications for hazard in regions of distributed shortening

Mackenzie¹,

Elliott²,

Altunel

et al. 2016

Geophys. J. Int.

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“…21 and 42). Beta dose attenuation was calculated using Mejdahl (1979). Based on these data, the average dose rates for grain sizes of 4-11 µm and 45-63 µm were calculated (see Table 2).…”

Section: Dose Rate Calculationmentioning

confidence: 99%

OSL chronostratigraphy for loess deposits from Tyszowce – Poland

et al. 2017

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Abstract:The presented work concerns a loess profile located in Tyszowce, in the eastern part of Poland on the Volyn Upland, close to the Ukrainian border. The investigated loess formation is well preserved and is characterised by clear stratigraphic units providing an opportunity to refine the loess chronostratigraphy in Poland. In the paper, we present luminescence ages of loess from the last glacial cycle in SE Poland (up to about 100 ka) together with seven radiocarbon ages. Twenty-one samples were collected and dated using infrared (post-IR IRSL) and blue light stimulated luminescence dating. Two fractions were used, namely polymineral fine grains (4-11 µm) and medium sized quartz grains (45-63 µm). The obtained luminescence ages show very good agreement of both methods in relation to loess deposits, however for the fossil soil units the post-IR IRSL method yields older ages. Radiocarbon dates also confirm luminescence chronostratigraphy for younger units. Moreover, the luminescence results are supported by detailed analyses of grain size distribution, carbonate content and magnetic susceptibility variations allowing to create a comprehensive picture of chronological evolution of this site.

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“…The cosmic-ray dose was calculated according to standard data reported by Prescott and Hutton (1994), taking into account sample depth and overburden density, along with the geomagnetic position of the site (latitude, longitude and altitude). Estimates of radionuclide concentrations were converted to dose rates according to conversion factors proposed by Adamiec and Aitken (1998), using corrections for grain size (Mejdahl 1979) and water content (Zimmermann 1971). The past water content of the sediments may, for short times, have deviated from the modern field values but the present moisture contents (ranging from 0.5-1.5%) may be considered to represent a good indication of the average water content of the samples throughout their burial history.…”

Section: Osl Datingmentioning

confidence: 99%

An early MIS 3 pluvial phase in Southeast Arabia: Climatic and archaeological implications

Parton

Farrant

Leng

et al. 2013

Quaternary International

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Climatic changes in Arabia are of critical importance to our understanding of both monsoon variability and the dispersal of anatomically modern humans (AMH) out of Africa. The timing of dispersal is associated with the occurrence of pluvial periods during Marine Isotope Stage (MIS) 5 (ca. 130-74ka), after which, arid conditions between ca. 74 and 10.5 ka are thought to have restricted further migration and range expansion within the Arabian interior. Whilst a number of records indicate that this phase of aridity was punctuated by an increase in monsoon strength during MIS 3, uncertainties regarding the precision of terrestrial records and suitability of marine archives as records of precipitation, mean that the occurrence of this pluvial remains debated. Here we present evidence from a series of relict lake deposits within southeastern Arabia, which formed at the onset of MIS 3 (ca. 61-58 ka). At this time, the incursion of monsoon rainfall into the Arabian interior activated a network of channels associated with an alluvial fan system along the western flanks of the Hajar Mountains, leading to lake formation. Multiproxy evidence indicates that precipitation increases intermittently recharged fluvial systems within the region, leading to lake expansion in distal fan zones. Conversely, decreased precipitation led to reduced channel flow, lake contraction and a shift to saline conditions. These findings are in contrast to the many other palaeoclimatic records from Arabia, which suggest that during MIS 3, the latitudinal position of the monsoon was substantially further south and did not penetrate the peninsula. Additionally, the occurrence of increased rainfall at this time challenges the notion that the climate of Arabia following MIS 5 was too harsh to permit the further range expansion of indigenous communities.

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Thermoluminescence Dating: Beta‐dose Attenuation in Quartz Grains

Cited by 828 publications

References 15 publications

Seismotectonics and rupture process of theM_W 7.1 2011 Van reverse-faulting earthquake, eastern Turkey, and implications for hazard in regions of distributed shortening

Seismotectonics and rupture process of theM_W 7.1 2011 Van reverse-faulting earthquake, eastern Turkey, and implications for hazard in regions of distributed shortening

OSL chronostratigraphy for loess deposits from Tyszowce – Poland

An early MIS 3 pluvial phase in Southeast Arabia: Climatic and archaeological implications

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Thermoluminescence Dating: Beta‐dose Attenuation in Quartz Grains

Cited by 828 publications

References 15 publications

Seismotectonics and rupture process of theMW 7.1 2011 Van reverse-faulting earthquake, eastern Turkey, and implications for hazard in regions of distributed shortening

Seismotectonics and rupture process of theMW 7.1 2011 Van reverse-faulting earthquake, eastern Turkey, and implications for hazard in regions of distributed shortening

OSL chronostratigraphy for loess deposits from Tyszowce – Poland

An early MIS 3 pluvial phase in Southeast Arabia: Climatic and archaeological implications

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Seismotectonics and rupture process of theM_W 7.1 2011 Van reverse-faulting earthquake, eastern Turkey, and implications for hazard in regions of distributed shortening

Seismotectonics and rupture process of theM_W 7.1 2011 Van reverse-faulting earthquake, eastern Turkey, and implications for hazard in regions of distributed shortening