The Matuyama/Brunhes geomagnetic polarity transition at Lingtai and Baoji, Chinese Loess Plateau

	The Matuyama/Brunhes geomagnetic polarity transition at Lingtai and Baoji, Chinese Loess Plateau
	Spassov, S ; Heller, F ; Evans, ME ; Yue, LP ; Ding, ZL
刊名	PHYSICS AND CHEMISTRY OF THE EARTH PART A-SOLID EARTH AND GEODESY
	2001
卷号	26 期号:11-12 页码:899-904
ISSN号	1464-1895
文献子类	Article
英文摘要	Two sections on the Chinese Loess Plateau (CLP) at Lingtai and Baoji have been investigated to obtain detailed information about the exact stratigraphic position and the recording quality of the Matuyarna/Brunhes geomagnetic polarity boundary (MBB). The continuously sampled MBB occurs in the glacial period loess layer L8 in both sections at a similar profile depth indicating comparable average sedimentation rates of about 8 cm/kyr. This stratigraphic position has been recognized in many previous Chinese loess studies and contrasts with observations in marine sediments where this polarity transition is found at the beginning of interglacial oxygen isotope stage 19. The directional patterns of the characteristic remanent magnetization (ChRM) of the two transitional loess records are inconsistent and even depend on the demagnetization technique used to isolate the ChRM. The MBB records also differ significantly from those obtained from the loess section at Weinan and at ODP site 792A near Japan. The VGP paths recorded in loess are not well defined, switch polarity several times and do not prefer specific longitudinal bands. It is suggested that the loess MBB transitional records do not reflect geomagnetic field variations directly, but are the result of a complicated magnetization lock-in mechanism. By comparison with the astronomical ly-tuned prediction, this process has been delayed in the loess sediment column by 1.5 to 2 m corresponding to about 25000 yr after deposition. (C) 2001 Elsevier Science Ltd. All rights reserved.
WOS关键词	NORTH-CENTRAL CHINA ; REVERSALS ; SEQUENCES ; GEOMETRY ; SECTION ; BRUNHES ; PATHS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000172564800007
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/77115]
专题	中国科学院地质与地球物理研究所
通讯作者	Spassov, S
作者单位	1.ETH Zurich, Dept Geophys, CH-8093 Zurich, Switzerland 2.Univ Alberta, Inst Geophys Res, Edmonton, AB T6G 2J1, Canada 3.NW Univ Xian, Inst Geol, Xian 710069, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Spassov, S,Heller, F,Evans, ME,et al. The Matuyama/Brunhes geomagnetic polarity transition at Lingtai and Baoji, Chinese Loess Plateau[J]. PHYSICS AND CHEMISTRY OF THE EARTH PART A-SOLID EARTH AND GEODESY,2001,26(11-12):899-904.
APA	Spassov, S,Heller, F,Evans, ME,Yue, LP,&Ding, ZL.(2001).The Matuyama/Brunhes geomagnetic polarity transition at Lingtai and Baoji, Chinese Loess Plateau.PHYSICS AND CHEMISTRY OF THE EARTH PART A-SOLID EARTH AND GEODESY,26(11-12),899-904.
MLA	Spassov, S,et al."The Matuyama/Brunhes geomagnetic polarity transition at Lingtai and Baoji, Chinese Loess Plateau".PHYSICS AND CHEMISTRY OF THE EARTH PART A-SOLID EARTH AND GEODESY 26.11-12(2001):899-904.