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

doi:10.1007/s11434-007-0319-5

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	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
	2007-09-01
发表期刊	CHINESE SCIENCE BULLETIN
ISSN	1001-6538
卷号	52 期号:17 页码:2407-2412
文章类型	Article
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.
关键词	interplanetary dust particles (IDPs) helium composition and isotope loess-paleosol sequence at Luochuan Chinese Loess Plateau
WOS标题词	Science & Technology
DOI	10.1007/s11434-007-0319-5
关键词[WOS]	DEEP-SEA SEDIMENT ; INTERPLANETARY DUST ; EXTRATERRESTRIAL HE-3 ; OCEAN SEDIMENTS ; COSMIC DUST ; MANTLE ; RATIO ; FLUX ; NEON
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000249381100016
出版者	SCIENCE PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.iggcas.ac.cn/handle/132A11/68187
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.