Pedostratigraphy and paleomagnetism of a similar to 7.0 Ma eolian loess-red clay sequence at Lingtai, Loess Plateau, north-central China and the implications for paleomonsoon evolution

	Pedostratigraphy and paleomagnetism of a similar to 7.0 Ma eolian loess-red clay sequence at Lingtai, Loess Plateau, north-central China and the implications for paleomonsoon evolution
	Ding, ZL; Xiong, SF; Sun, JM; Yang, SL; Gu, ZY; Liu, TS
刊名	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
	1999-08-15
卷号	152 期号:1-2 页码:49-66
关键词	red clay formation eolian sediments paleosols paleomagnetism East-Asia summer monsoon
ISSN号	0031-0182
文献子类	Article
英文摘要	A 305-m-thick loess-red clay sequence was discovered recently at Lingtai, which is located in the middle part of the Chinese Loess Plateau. It consists of a complete Pleistocene loess-soil sequence with a thickness of about 175 m and 130 m of Tertiary red clay deposits. The red clay sequence at Lingtai is the thickest one presently known in the Loess Plateau. Field observations show that the Lingtai red clay contains over 110 couplers of pedogenic B horizons and horizontal carbonate nodule horizons, and that it can be regarded as an extremely thick soil complex. Paleomagnetic studies of 680 samples suggest that the basal age of the Lingtai loess-red clay sequence is about 7.05 Ma. Grain size analysis of samples taken at 3.3 cm intervals indicates that the red clay has the same sedimentological characteristics as those observed in the loess, thus suggesting a wind-blown origin of the Tertiary red clay and continuous atmospheric dust deposition in the Loess Plateau during the last 7.05 Ma. The pedogenic characteristics of the paleosols within the Pleistocene loess and the B horizons in the red clay suggest that the East-Asia summer monsoon in the latest Miocene may have already been slightly stronger than that during the Holocene. This implies that at about 7.5 Ma BP, the Tibetan Plateau could have been uplifted to a critical height in maintaining the East-Asia summer monsoon system. Observations of the loess-red clay sequence also suggest that the long-term changes in the East-Asia summer monsoon strength have been nonlinear since the latest Miocene. (C) 1999 Elsevier Science B.V. All rights reserved.
WOS关键词	PRELIMINARY MAGNETOSTRATIGRAPHY ; AR-40/AR-39 ANALYSIS ; MONSOON VARIATIONS ; TIBETAN UPLIFT ; CLIMATE-CHANGE ; ASIAN MONSOON ; SOUTHERN ASIA ; AMERICAN WEST ; K-FELDSPAR ; RECORD
WOS研究方向	Physical Geography ; Geology ; Paleontology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000081848300004
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/75390]
专题	中国科学院地质与地球物理研究所
通讯作者	Ding, ZL
作者单位	Chinese Acad Sci, Inst Geol, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Ding, ZL,Xiong, SF,Sun, JM,et al. Pedostratigraphy and paleomagnetism of a similar to 7.0 Ma eolian loess-red clay sequence at Lingtai, Loess Plateau, north-central China and the implications for paleomonsoon evolution[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,1999,152(1-2):49-66.
APA	Ding, ZL,Xiong, SF,Sun, JM,Yang, SL,Gu, ZY,&Liu, TS.(1999).Pedostratigraphy and paleomagnetism of a similar to 7.0 Ma eolian loess-red clay sequence at Lingtai, Loess Plateau, north-central China and the implications for paleomonsoon evolution.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,152(1-2),49-66.
MLA	Ding, ZL,et al."Pedostratigraphy and paleomagnetism of a similar to 7.0 Ma eolian loess-red clay sequence at Lingtai, Loess Plateau, north-central China and the implications for paleomonsoon evolution".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 152.1-2(1999):49-66.