Zebra layers and palaeoenvironment of Late Miocene Stratum in the Linxia Basin, northwestern China

doi:10.1007/s12040-018-1031-3

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 兰州油气中心

	Zebra layers and palaeoenvironment of Late Miocene Stratum in the Linxia Basin, northwestern China
	Nian, Xiuqing 1,2,3; Liu, Xiuming 4,5,6; Guo, Hui 2,7; Liu, Zhi 8,9; Lue, Bin 4,5; Han, Fengqing 1,3
刊名	JOURNAL OF EARTH SYSTEM SCIENCE
	2019-02-01
卷号	128 期号:1 页码:10
关键词	Late Miocene strata Zebra layers tilted side slope anisotropy of magnetic susceptibility (AMS) palaeoenvironment Linxia Basin
ISSN号	0253-4126
DOI	10.1007/s12040-018-1031-3
英文摘要	Miocene strata in the Linxia Basin (Gansu, China) are usually interpreted as lacustrine sediments. However, the red-grey inter-beds known as 'Zebra layers' commonly tilt with respect to the terrain on the side slopes of the modern valley, which may be due to mantling palaeotopography (similar to aeolian loess). The anisotropy of magnetic susceptibility, which reflects the original arrangement of magnetic particles in sediments, was applied to investigate this phenomenon. The results showed that the tilting of the inter-beds in the side slope was due to mantle palaeotopography rather than soil creep, and that they were not deposited in a subaqueous environment. The grain sizes of sediments showed similar features as aeolian loess. We speculate that Miocene sediments were deposited by mantling the palaeotopography where aeolian materials accumulated. After deposition, flowing water submerged these strata, which caused the side slope to become gradually thinner from top to bottom and stirred the magnetic particles in these sediments. The grey colour of the Zebra layers may not be original, as it may be due to waterlogging and deoxidation after deposition; finally, when the iron oxides in these sediments were transformed or removed, their colours became grey. The formation of Zebra layers indicates that the Late Miocene palaeoenvironment of northwestern China was similar to that in which Quaternary aeolian loess was deposited.
资助项目	National Natural Science Foundation of China[41210002] ; National Natural Science Foundation of China[U1405231]
WOS关键词	MAGNETIC-SUSCEPTIBILITY ; IRON-OXIDES ; RED CLAY ; LOESS ; SEDIMENTS ; ANISOTROPY ; MAGNETOSTRATIGRAPHY ; ARIDIFICATION ; OLIGOCENE ; PLATEAU
WOS研究方向	Geology ; Science & Technology - Other Topics
语种	英语
出版者	INDIAN ACAD SCIENCES
WOS记录号	WOS:000451759900002
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/89640]
专题	地质与地球物理研究所_兰州油气中心
通讯作者	Liu, Xiuming
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Qinghai, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Qinghai Prov Key Lab Geol & Environm Salt Lake, Xining 810008, Qinghai, Peoples R China 4.Fujian Normal Univ, Inst Geog, Fuzhou 350007, Fujian, Peoples R China 5.Fujian Normal Univ, Coll Geog Sci, Minist Sci & Technol & Fujian Prov, Key Lab Subtrop Mt Ecol, Fuzhou 350007, Fujian, Peoples R China 6.Macquarie Univ, Dept Environm & Geog, Sydney, NSW 2109, Australia 7.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Key Lab Petr Resources Gansu Prov, Lanzhou 730000, Gansu, Peoples R China 8.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Shaanxi, Peoples R China 9.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Nian, Xiuqing,Liu, Xiuming,Guo, Hui,et al. Zebra layers and palaeoenvironment of Late Miocene Stratum in the Linxia Basin, northwestern China[J]. JOURNAL OF EARTH SYSTEM SCIENCE,2019,128(1):10.
APA	Nian, Xiuqing,Liu, Xiuming,Guo, Hui,Liu, Zhi,Lue, Bin,&Han, Fengqing.(2019).Zebra layers and palaeoenvironment of Late Miocene Stratum in the Linxia Basin, northwestern China.JOURNAL OF EARTH SYSTEM SCIENCE,128(1),10.
MLA	Nian, Xiuqing,et al."Zebra layers and palaeoenvironment of Late Miocene Stratum in the Linxia Basin, northwestern China".JOURNAL OF EARTH SYSTEM SCIENCE 128.1(2019):10.