The Matuyama-Brunhes polarity reversal in four Chinese loess records: high-fidelity recording of geomagnetic field behavior or a less than reliable chronostratigraphic marker?

doi:10.1016/j.quascirev.2014.07.005

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质科学院地质力学研究所

	The Matuyama-Brunhes polarity reversal in four Chinese loess records: high-fidelity recording of geomagnetic field behavior or a less than reliable chronostratigraphic marker?
	Wang, Xisheng 3; Lovile, Reidar 1; Chen, Yun ; Yang, Zhenyu ; Pei, Junling ; Tang, Ling
刊名	QUATERNARY SCIENCE REVIEWS
	2014
卷号	101 页码:61-76
关键词	Loess Matuyama-Brunhes reversal Remanence acquisition mechanism Geomagnetic field Pedogenesis East Asian monsoon
ISSN号	0277-3791
DOI	10.1016/j.quascirev.2014.07.005
英文摘要	The paleomagnetic recording fidelity of Chinese loess has been a matter of long-term dispute. To help shed light on the acquisition/retention mechanisms of natural remanent magnetization in loess, we report on high-sampling-resolution paleomagnetic constraints on the position of the Matuyama -Brunhes Boundary (MBB) in four typical loess sections in different marginal areas of the Chinese Loess Plateau (CLP), each of which has experienced different East Asian winter/summer monsoon strengths and pedogenic intensities. Detailed thermal demagnetization experiments for 1850 specimens reveal that none of the high-accumulation-rate loess with the weakest pedogenesis at Caotan (western CLP), the massive Pedogenesis loess characterized by extensive development of thick calcareous nodule layers at Jixian (SE CLP), and the moderately pedogenized loess at Fanshan (NE CLP) have preserved high-fidelity geomagnetic records across the MBBs. Jiuzhoutai (western CLP), one of the thickest loess profiles in the world, contains the thickest, and hitherto the most complex MBB that is too extensive to be regarded as rapid fluctuations of geomagnetic field during the M/B reversal. At Jixian, a predominance of pedogenesis-induced chemical remanent magnetization overprinting has heavily obscured the original remanence. The significant downward displacement of the MBB at Fanshan and even its total absence at Caotan, together with extensive remagnetization of the coarse-grained 'upper sandy loess layer' (L9) in both sections, further suggest that the processes of remanence acquisition/retention of Chinese loess in the marginal areas of the CLP are rather complicated. Thus, interpretations of the fine structure of geomagnetic transitional field behavior and 'excursions', especially in the Matuyama Chron, should be regarded with caution. (C) 2014 Elsevier Ltd. All rights reserved.
学科主题	固体地球物理学
WOS关键词	LOCK-IN ; ASTRONOMICAL CALIBRATION ; MAGNETIC-SUSCEPTIBILITY ; ICE CORE ; PLATEAU ; BOUNDARY ; DEPOSITS ; SEQUENCES ; MARINE ; AGE
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000342714400005
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/41037]
专题	中国地质科学院地质力学研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geomech, MLR Key Lab Paleomagnetism & Paleotecton Reconstr, Beijing 100081, Peoples R China 2.Univ Bergen, Dept Earth Sci, N-5007 Bergen, Norway 3.中国地质科学院地质力学研究所
推荐引用方式 GB/T 7714	Wang, Xisheng,Lovile, Reidar,Chen, Yun,et al. The Matuyama-Brunhes polarity reversal in four Chinese loess records: high-fidelity recording of geomagnetic field behavior or a less than reliable chronostratigraphic marker?[J]. QUATERNARY SCIENCE REVIEWS,2014,101:61-76.
APA	Wang, Xisheng,Lovile, Reidar,Chen, Yun,Yang, Zhenyu,Pei, Junling,&Tang, Ling.(2014).The Matuyama-Brunhes polarity reversal in four Chinese loess records: high-fidelity recording of geomagnetic field behavior or a less than reliable chronostratigraphic marker?.QUATERNARY SCIENCE REVIEWS,101,61-76.
MLA	Wang, Xisheng,et al."The Matuyama-Brunhes polarity reversal in four Chinese loess records: high-fidelity recording of geomagnetic field behavior or a less than reliable chronostratigraphic marker?".QUATERNARY SCIENCE REVIEWS 101(2014):61-76.