Paleomagnetic constraints on plate tectonic process at south mid-Atlantic ridge

doi:10.6038/cjg20160515

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 > 中国科学院地球与行星物理重点实验室

	Paleomagnetic constraints on plate tectonic process at south mid-Atlantic ridge
	Li Yuan-Jie 1,2; Wei Dong-Ping 1,2; Liu Qing-Song 3,4
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2016-05-01
卷号	59 期号:5 页码:1705-1716
关键词	Plate Tectonic Paleomagnetic Marine Magnetic Anomaly
DOI	10.6038/cjg20160515
文献子类	Article
英文摘要	Shape of marine magnetic anomalies provides great information on micro movement or deformation of plates on both sides of the mid-ridge. Therefore, studies on morphology of marine magnetic anomalies provides crucial constraints for evolution history and small-scale dynamic process of the plate movement, as well as mechanisms for segmentation of spreading axes. In this paper, a systematic study on skewness of marine magnetic anomalies on both sides of the mid oceanic ridge (31 degrees S-34.5 degrees S) in South Atlantic was conducted. Results showed that the spreading direction of plates isn't perpendicular to the trend of the mid-oceanic ridge, and spreading directions for different profiles are inconsistent in three studied areas, and gradually increase (from 33.6 degrees+/-5.3 degrees to 62.8 degrees+/-13 degrees, and to 94.3 degrees+/-8 degrees) from north to south. This indicates that mechanism of the oblique spreading is complicated. Our preliminary interpretation is that this complexity is related to increasing in shear stress across transforms. Nevertheless, effects of tilting of gabbro and asymmetric spreading rates on the morphology of marine magnetic anomalies need more attentions. In addition, the eastward displacement of Euler poles in three studied areas indicates that significant deformation between plates on both sides of the mid-ridge occurred at about 6.5 Ma.
WOS关键词	MARINE MAGNETIC-ANOMALIES ; OCEANIC-CRUST ; SPREADING CENTERS ; RIFT PROPAGATION ; REMANENT MAGNETIZATION ; AXIS DISCONTINUITIES ; TRANSFORM FAULTS ; REYKJANES RIDGE ; FLOOR ; OBLIQUE
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000375637700015
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53516]
专题	地质与地球物理研究所_中国科学院地球与行星物理重点实验室
作者单位	1.Chinese Acad Sci, Key Lab Computat Geodynam, Beijing 100049, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
推荐引用方式 GB/T 7714	Li Yuan-Jie,Wei Dong-Ping,Liu Qing-Song. Paleomagnetic constraints on plate tectonic process at south mid-Atlantic ridge[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2016,59(5):1705-1716.
APA	Li Yuan-Jie,Wei Dong-Ping,&Liu Qing-Song.(2016).Paleomagnetic constraints on plate tectonic process at south mid-Atlantic ridge.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,59(5),1705-1716.
MLA	Li Yuan-Jie,et al."Paleomagnetic constraints on plate tectonic process at south mid-Atlantic ridge".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 59.5(2016):1705-1716.