Magnetic research of Late Cretaceous red beds in southern Jiangxi province and its geological implications

doi:10.6038/cjg20171214

	Magnetic research of Late Cretaceous red beds in southern Jiangxi province and its geological implications
	Zhang Bin 1,2; Liu Ping 2; Xiong Shang-Fa 1; Jiang Zhao-Xia1 ; Wu Jia-Bin 1,2; Guo Li-Cheng 1,2
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2017-12-01
卷号	60 期号:12 页码:4709-4729
关键词	Cretaceous Red Beds Hematite Rock Magnetism Characteristic Remanent Magnetization Magnetostratigraphy Sem
ISSN号	0001-5733
DOI	10.6038/cjg20171214
文献子类	Article
英文摘要	Magnetostratigraphy is an important method for dating sedimentary sequences. Its effective application is based on the record of a reliable characteristic remanent magnetization (ChRM). Magnetostratigraphy of red beds is significant for the study of Late Mesozoic paleoenvironment and paleoclimate evolution in South China. However, enormous controversies exist in the reliability of the paleomagnetic data recorded by red beds. To address this issue, a systematic investigation should be carried out on the magnetic minerals of sediments through rock magnetic and non-magnetic methods (e.g., Scanning Electron Microscope, SEM). In this study, we carried out a detailed investigation on the rock magnetic characteristics of the two Late Cretaceous red beds sections (Xinfeng (XF) section and Liuche (LC) section). Based on rock magnetic and SEM results, we conclude that (a) hematite is the main magnetic mineral, coexisting with a small amount of goethite, maghemite and magnetite. (b) Hematite is the most important remanence carrier, which records a primary Detrital Remanent Magnetization (DRM). Combining the reliable paleomagnetic information and previous biostratigraphic and chronologic studies, the ages of LC section and XF section are Cenomanian and Maastrichtian, respectively, compared with the stratigraphy of adjacent area. Furthermore, according to ESR dating and analysis of the stratum in Nanxiong Basin, the age of XF section can be determined at the C30n (68.19 similar to-66.398 Ma). Acquirement of the ages of the two sequences provides a reliable time scale for paleoclimate and paleoenvironment evolution in this area.
WOS关键词	TECTONIC EVOLUTION ; ENVIRONMENTAL MAGNETISM ; SOUTHEASTERN CHINA ; COLORADO PLATEAU ; GRAY MOUNTAIN ; IGNEOUS ROCKS ; SUSCEPTIBILITY ; PEDOGENESIS ; COMPONENTS ; POLARITY
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000418626400014
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82380]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhang Bin
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang Bin,Liu Ping,Xiong Shang-Fa,et al. Magnetic research of Late Cretaceous red beds in southern Jiangxi province and its geological implications[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2017,60(12):4709-4729.
APA	Zhang Bin,Liu Ping,Xiong Shang-Fa,Jiang Zhao-Xia,Wu Jia-Bin,&Guo Li-Cheng.(2017).Magnetic research of Late Cretaceous red beds in southern Jiangxi province and its geological implications.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,60(12),4709-4729.
MLA	Zhang Bin,et al."Magnetic research of Late Cretaceous red beds in southern Jiangxi province and its geological implications".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 60.12(2017):4709-4729.