Ultrafast Component Effects on Quartz Single Grains Dose Estimation from Khutagt Uul Mountains, Mongolia

IF 1.2 4区地球科学 Q3 Earth and Planetary Sciences

Geochronometria Pub Date : 2020-07-22 DOI:10.1515/geochr-2015-0117

S. Tengis, S. Solongo, Rinchinkhorol Munkhtulga

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Abstract

Abstract This study presents single-grain optically stimulated luminescence (OSL) results from pottery and sediments from the archaeological site “The burials in Khutag Uul Mountains (Mongolia)”. A global fitting procedure was used on a selection of single grains from pottery, D0 values obtained were between 16 to 40 Gy and 25 to 82 Gy and the equivalent doses De ranged from ∼8 to 12 Gy and from 4.2 ± 0.4 Gy to 37.3 ± 2.5 Gy for pottery and sedimentary quartz, correspondingly. For pottery, the relative spread in CAM De values increases as higher precision constraints are applied and lead to significant increases in the relative standard error from 2.7% to ∼7.5%. The number of accepted grains which passed acceptance criteria reduced from 180 to 65. For sedimentary quartz, there is a trend observed that both MAM De and FMM De values increase as higher precision in De is applied, and the number of accepted grains reduces from 146 to 53. The detailed study of the OSL decay curves identified an ultrafast OSL component with the decay rates of 53 ± 1 s−1 in addition to the fast and medium components and its effect on De was examined.

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蒙古呼塔格特乌尔山石英单粒剂量估算的超快分量效应

摘要本研究介绍了来自考古遗址“Khutag Uul山脉（蒙古）墓葬”的陶器和沉积物的单颗粒光激发光（OSL）结果。对陶器中的单个晶粒进行了全局拟合，获得的D0值在16至40 Gy和25至82 Gy之间，相应地，陶器和沉积石英的等效剂量De在～8至12 Gy和4.2±0.4 Gy至37.3±2.5 Gy之间。对于陶器，CAM De值的相对分布随着应用更高精度约束而增加，并导致相对标准误差从2.7%显著增加到~7.5%。通过验收标准的合格晶粒数量从180个减少到65个。对于沉积石英，观察到一种趋势，即MAM-De和FMM-De值随着De精度的提高而增加，可接受的晶粒数量从146个减少到53个。OSL衰减曲线的详细研究确定了一种超快OSL成分，除了快速和中等成分外，其衰减率为53±1 s−1，并检查了其对De的影响。

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来源期刊

Geochronometria 地学-地球科学综合

CiteScore

2.20

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Geochronometria is aimed at integrating scientists developing different methods of absolute chronology and using them in different fields of earth and other natural sciences and archaeology. The methods in use are e.g. radiocarbon, stable isotopes, isotopes of natural decay series, optically stimulated luminescence, thermoluminescence, EPR/ESR, dendrochronology, varve chronology. The journal publishes papers that are devoted to developing the dating methods as well as studies concentrating on their applications in geology, palaeoclimatology, palaeobiology, palaeohydrology, geocgraphy and archaeology etc.