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DOI	10.1111/bor.12096
	Luminescence dating of lacustrine sediments from Tangra Yumco (southern Tibetan Plateau) using post-IR IRSL signals from polymineral grains
	Long, Hao; Haberzettl, Torsten; Tsukamoto, Sumiko; Shen, Ji; Kasper, Thomas; Daut, Gerhard; Zhu, Liping; Maeusbacher, Roland; Frechen, Manfred
通讯作者	Long, H (通讯作者)
发表日期	2015
ISSN	0300-9483
EISSN	1502-3885
起始页码	139
结束页码	152
卷号	44 期号:1
英文摘要	Radiocarbon dating of bulk organic matter is the most commonly used method for establishing chronologies of lake sediments for palaeoclimate reconstructions on the Tibetan Plateau. However, this method is likely to be problematic because the dated material often suffers from old carbon contamination. Recently, advances in luminescence-based chronological techniques have provided new options for dating lacustrine sediments. In the current study, we tested for the first time the applicability of a new post-IR IRSL (pIRIR) measurement protocol for dating fine-grained polymineral material from a deep-lake sediment core from the central part of Tangra Yumco, on the southern Tibetan Plateau. Our results show that: (i) radioactive disequilibria in the uranium decay chain were observed in the studied lake sediments, and thus taken into account for dose rate calculation by using a dynamic modelling approach; (ii) the suitability and robustness of the pIRIR protocol measured at 150 degrees C (pIRIR(150)) for our samples are confirmed by a set of luminescence characteristic tests as well as the agreement with an independent age control; (iii) turbidite deposition partly caused an insufficient resetting of luminescence signals and thus apparent overestimation in luminescence dating; (iv) compared with the luminescence-based age-depth model, the C-14 ages of bulk organic matter from the studied core generally yielded an age difference of approximate to 2 ka, which is attributed to hardwater reservoir effects in Tangra Yumco. This study highlights the need for multi-dating approaches of lake sedimentary archives on the Tibetan Plateau.
关键词	OPTICALLY STIMULATED LUMINESCENCE NAM CO LAKE FELDSPAR AGE QUARTZ LOESS RATES EVOLUTION RECORDS
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000347169200011
来源期刊	BOREAS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258538
推荐引用方式 GB/T 7714	Long, Hao,Haberzettl, Torsten,Tsukamoto, Sumiko,et al. Luminescence dating of lacustrine sediments from Tangra Yumco (southern Tibetan Plateau) using post-IR IRSL signals from polymineral grains[J]. 中国科学院青藏高原研究所,2015,44(1).
APA	Long, Hao.,Haberzettl, Torsten.,Tsukamoto, Sumiko.,Shen, Ji.,Kasper, Thomas.,...&Frechen, Manfred.(2015).Luminescence dating of lacustrine sediments from Tangra Yumco (southern Tibetan Plateau) using post-IR IRSL signals from polymineral grains.BOREAS,44(1).
MLA	Long, Hao,et al."Luminescence dating of lacustrine sediments from Tangra Yumco (southern Tibetan Plateau) using post-IR IRSL signals from polymineral grains".BOREAS 44.1(2015).