A high resolution method for C-14 analysis of a coral from South China Sea: Implication for "AD 775" C-14 event

doi:10.1016/j.nimb.2015.06.032

	A high resolution method for C-14 analysis of a coral from South China Sea: Implication for "AD 775" C-14 event
	Yi, Weixi 1; Ding, Xingfang 4; Wang, Ning 1; Ding, Ping 1; Liu, Kexin 4; Fu, Dongpo 4; Liu, Weiguo 2; Liu, Yi 3; Shen, Chengde 1,4
刊名	NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
	2015-10-15
卷号	361 页码:659-664
关键词	Pre-heating Coral Bi-weekly Resolution Ad 776 C-14 Spike
DOI	10.1016/j.nimb.2015.06.032
文献子类	Article
英文摘要	A pre-heating method that improves the background and precision of C-14 dating significantly was applied for fossil coral dating with high resolution in our lab in Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS). The reaction tube is heated under 300 degrees C in a vacuum line before it is used for graphitization. The method can reduce the contamination absorbed in TiH2, Zn and Fe power placed in the graphitization tube. With the pre-heating and average drilling method, bi-weekly resolution C-14 dating in a fossil coral is carried out to investigate the "AD 775 C-14 spike event". Different from the tree ring C-14 archives with the C-14 spike of similar to 15 parts per thousand (Delta C-14), the C-14 spike in the coral shows an abrupt peak of 45 parts per thousand and two smaller spikes of Delta C-14 > 20 parts per thousand in half a year in AD 776. And then, the C-14 content in coral decreases gradually in AD 777. The peak time of the C-14 spike event likely occurs in the summer of AD 776 according to the delta O-18 variation in coral. High-resolution dating of C-14 in coral provides not only a more detail process of the event than that from tree rings, but also the first report of the event from sea ecosystem. Both of them suggest an extraterrestrial origin of the event cause. (C) 2015 Elsevier B.V. All rights reserved.
WOS关键词	ASIAN MONSOON ; VARIABILITY ; JAPAN ; SUN
WOS研究方向	Instruments & Instrumentation ; Nuclear Science & Technology ; Physics
语种	英语
WOS记录号	WOS:000363345900123
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/5061]
专题	地球环境研究所_加速器质谱中心
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China 3.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China 4.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Yi, Weixi,Ding, Xingfang,Wang, Ning,et al. A high resolution method for C-14 analysis of a coral from South China Sea: Implication for "AD 775" C-14 event[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,2015,361:659-664.
APA	Yi, Weixi.,Ding, Xingfang.,Wang, Ning.,Ding, Ping.,Liu, Kexin.,...&Shen, Chengde.(2015).A high resolution method for C-14 analysis of a coral from South China Sea: Implication for "AD 775" C-14 event.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,361,659-664.
MLA	Yi, Weixi,et al."A high resolution method for C-14 analysis of a coral from South China Sea: Implication for "AD 775" C-14 event".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 361(2015):659-664.