气候变化领域集成服务门户(CCPortal): Relative paleointensity correction of radiocarbon reservoir effect for lacustrine sediments on the northeast Tibetan Plateau

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DOI	10.1016/j.quageo.2021.101193
	Relative paleointensity correction of radiocarbon reservoir effect for lacustrine sediments on the northeast Tibetan Plateau
	Ma, He; Wang, Yong-Li; Jin, Chun-Sheng; Wei, Zhi-Fu; Wang, Gen; Zhang, Ting; He, Wei; Ma, Xue-Yun
通讯作者	Wang, YL (通讯作者)，Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, 19 Beitucheng West Rd, Beijing 100029, Peoples R China. ; Jin, CS (通讯作者)，Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China.
发表日期	2021
ISSN	1871-1014
EISSN	1878-0350
卷号	65
英文摘要	An accurate chronological framework is vital if we are to use lacustrine sediments on the Tibetan Plateau (TP) for paleoclimate reconstruction. Radiocarbon (14C) dating is the most frequently used method for dating late Quaternary lacustrine sediments. However, it is often affected by potential reservoir effects. Owing to the complex hydrogeology and sedimentology processes of the lake we study in this paper, it is difficult to correct this effect. Geomagnetic relative paleointensity (RPI) method has demonstrated the potential to construct an accurate high-resolution chronological framework for sediments in the Brunhes chron. In this study, we present an RPI record as well as environmental magnetism results from a core (HL) on the Hurleg Lake in the northeast TP. We aim to determine the reservoir effect and establish an accurate timescale for the core. The RPI record was constructed by normalizing the natural remanent magnetization after 30 mT alternating field demagnetization with saturation isothermal remanent magnetization (NRM30mT/SIRM). This exhibits a general agreement with other geomagnetic intensity stacks from the world, suggesting that global-scale patterns of geomagnetic paleointensity behavior were also documented in Hurleg Lake sediments. Our RPI record can be adequately matched to RPI references to provide three additional age tie points for the HL core. We then evaluated the reservoir effect and constructed a timescale for the core using chronological controls from both RPI and 14C dating. The estimated RE age was weak below 272 cm, was 2-3 ka at the upper 50 cm, and was inferred to have increased between depths of 272 and 50 cm. Environmental magnetism sequences from core HL display a similar paleoclimatic pattern with records from core HL05-2 and core K-2 both in the Hurleg Lake area, suggesting that correction for the radiocarbon reservoir effect is accurate and timescale of core HL is reliable. Our study further demonstrates that the method of obtaining age control points from RPI is applicable to lake sediments on the TP.
关键词	OPTICALLY STIMULATED LUMINESCENCE GEOMAGNETIC-FIELD LAKE-SEDIMENTS HOLOCENE VEGETATION ASIAN MONSOON QINGHAI LAKE GRAIN-SIZE ENVIRONMENTAL MAGNETISM PALEOCLIMATIC CHANGES PALEOMAGNETIC RECORD
英文关键词	Relative paleointensity; Radiocarbon reservoir effect; Lacustrine sediment; Hurleg lake; Tibetan plateau
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000659911900003
来源期刊	QUATERNARY GEOCHRONOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254950
作者单位	[Ma, He; Wang, Yong-Li; Jin, Chun-Sheng] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, 19 Beitucheng West Rd, Beijing 100029, Peoples R China; [Ma, He; He, Wei; Ma, Xue-Yun] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Wang, Yong-Li] Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China; [Jin, Chun-Sheng] Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China; [Wei, Zhi-Fu; Wang, Gen; Zhang, Ting; He, Wei; Ma, Xue-Yun] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Ma, He,Wang, Yong-Li,Jin, Chun-Sheng,et al. Relative paleointensity correction of radiocarbon reservoir effect for lacustrine sediments on the northeast Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2021,65.
APA	Ma, He.,Wang, Yong-Li.,Jin, Chun-Sheng.,Wei, Zhi-Fu.,Wang, Gen.,...&Ma, Xue-Yun.(2021).Relative paleointensity correction of radiocarbon reservoir effect for lacustrine sediments on the northeast Tibetan Plateau.QUATERNARY GEOCHRONOLOGY,65.
MLA	Ma, He,et al."Relative paleointensity correction of radiocarbon reservoir effect for lacustrine sediments on the northeast Tibetan Plateau".QUATERNARY GEOCHRONOLOGY 65(2021).