Helium isotope investigation on magnetic reversal boundaries of loess-paleosol sequence at Luochuan, central Chinese Loess Plateau

doi:10.1007/s11434-007-0319-5

	Helium isotope investigation on magnetic reversal boundaries of loess-paleosol sequence at Luochuan, central Chinese Loess Plateau
	Du XuQing ; Wang YongHong ; Ren JianGuo ; Ye XianRen ; Lu HuaYu
刊名	CHINESE SCIENCE BULLETIN
	2007-09-01
卷号	52 期号:17 页码:2407-2412
关键词	interplanetary dust particles (IDPs) helium composition and isotope loess-paleosol sequence at Luochuan Chinese Loess Plateau
ISSN号	1001-6538
DOI	10.1007/s11434-007-0319-5
文献子类	Article
英文摘要	Extraterrestrial particles have higher He-3/He-4 ratios than those of terrestrial sediments ( > 100 Ra versus < 0.03 Ra, where Ra is the 3He/4He ratio normalized to the atmospheric value of 1.4x10(-6)). The interplanetary dust particles (IDPs), which are very rich in 3 He, continuously bombard the Earth and can accumulate in deposits. IDPS sedimentation rate changes can significantly influence He-3 concentration in the Earth surface sediments. Since IDPs are not easy to detect in terrestrial deposits, measuring helium isotopes is a helpful approach to examine changes in IDPS. Helium concentration and helium isotopic composition magnetic substances and the quartz particles were examined for helium concentration and helium isotopic ratio. Results show that the He-3/He-4 ratio and the He-3 concentrations of the magnetic substances are clearly higher than those of the bulk samples and the quartz particles, and, the He-3/He-4 ratio of the extracted magnetic substances is also higher than that of the average level of the Earth's crust. The higher helium content in the magnetic fractions can be explained by an influx of IDPs.
WOS关键词	DEEP-SEA SEDIMENT ; INTERPLANETARY DUST ; EXTRATERRESTRIAL HE-3 ; OCEAN SEDIMENTS ; COSMIC DUST ; MANTLE ; RATIO ; FLUX ; NEON
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000249381100016
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/68185]
专题	中国科学院地质与地球物理研究所
通讯作者	Lu HuaYu
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quatermary Geol, Xian 710075, Peoples R China 2.Ocean Univ China, Coll Marine Geosci, Qingdao 266003, Peoples R China 3.Natl Nat Sci Fdn China, Beijing 100085, Peoples R China 4.Chinese Acad Sci, Inst Geochem & Geophys, Lanzhou Res Ctr Petr & Nat Gas Resources, Lanzhou 730000, Peoples R China 5.Nanjing Univ, Sch Geog & Oceanog Sci, Key Lab Coast & Isl Dev, Nanjing 210093, Peoples R China 6.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Du XuQing,Wang YongHong,Ren JianGuo,et al. Helium isotope investigation on magnetic reversal boundaries of loess-paleosol sequence at Luochuan, central Chinese Loess Plateau[J]. CHINESE SCIENCE BULLETIN,2007,52(17):2407-2412.
APA	Du XuQing,Wang YongHong,Ren JianGuo,Ye XianRen,&Lu HuaYu.(2007).Helium isotope investigation on magnetic reversal boundaries of loess-paleosol sequence at Luochuan, central Chinese Loess Plateau.CHINESE SCIENCE BULLETIN,52(17),2407-2412.
MLA	Du XuQing,et al."Helium isotope investigation on magnetic reversal boundaries of loess-paleosol sequence at Luochuan, central Chinese Loess Plateau".CHINESE SCIENCE BULLETIN 52.17(2007):2407-2412.