Rock magnetism of deep-sea sediments at Caiwei Guyot, Magellan seamounts of Northwest Pacific and its significance to abyssal environmental changes

doi:10.6038/cjg2019M0526

	Rock magnetism of deep-sea sediments at Caiwei Guyot, Magellan seamounts of Northwest Pacific and its significance to abyssal environmental changes
	Lin Zhen 1,2; Yi Liang 3; Wang HaiFeng 4; Deng XiGuang 4; Yang JiChao 5; Fu TengFei 6; Yu HongJun 5; Xie Qiang 1; Deng ChengLong 2,7,8
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2019-08
卷号	62 期号:8 页码:3067-3077
关键词	Northwest Pacific Caiwei Guyot Rock magnetism Early diagenesis Deep-sea environmental changes
ISSN号	0001-5733
DOI	10.6038/cjg2019M0526
英文摘要	Seamounts constitute some of the most direct evidence about intraplate volcanism, and can profoundly affect physical and biological processes, mesoscale circulation and primary production. Caiwei Guyot locates within the Magellan Seamounts of the Northwest Pacific Ocean, where is one of the key investigation areas discovered, named and responsible for resource exploration by China. In this study, we carried out detailed rock magnetic investigations on a sedimentary sequence obtained from the Caiwei Guyot. The methods include hysteresis loops, isothermal remanent acquisition curves, and first-order reversal curves. It is found that the magnetic minerals in the surface sediments of the Caiwei Guyot are mainly fine-grained magnetite with low coercivity; and three magnetic sub-groups with different coercivity values can be mathematically distinguished by a log-normal distribution function, inferring that the change of the coercivity of the magnetic particles can effectively indicate the intensity of the early diagenesis of the sediments. Referring to the physical ocean process, we speculate that the production changes of the Antarctic bottom water and solar insolation may affect the environmental evolution of ocean bottom. Therefore, we suggest that this result provides new perspective to explore the possible impacts of the Antarctic climate on the North Pacific, and to assess the interactions between the upper and lower parts of the oceans, which both may have directly contributed to global changes.
WOS关键词	MARINE-SEDIMENTS ; PARTICLE-SYSTEMS ; SURFACE VORTEX ; LOESS PLATEAU ; DISCRIMINATION ; DIAGENESIS ; EROSION ; CLIMATE ; MONSOON ; EDDIES
WOS研究方向	Geochemistry & Geophysics
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000480300600023
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/30078]
专题	自然资源部第一海洋研究所
通讯作者	Deng ChengLong
作者单位	1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Hainan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China 4.China Geol Survey, Guangzhou Marine Geol Survey, MNR Key Lab Marine Mineral Resources, Guangzhou 510640, Guangdong, Peoples R China 5.Natl Deep Sea Ctr China, Qingdao 266061, Shandong, Peoples R China 6.Minist Nat Resources, MNR Key Lab Marine Sedimentol & Environm Geol, Inst Oceanog 1, Qingdao 266061, Shandong, Peoples R China 7.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China 8.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Lin Zhen,Yi Liang,Wang HaiFeng,et al. Rock magnetism of deep-sea sediments at Caiwei Guyot, Magellan seamounts of Northwest Pacific and its significance to abyssal environmental changes[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2019,62(8):3067-3077.
APA	Lin Zhen.,Yi Liang.,Wang HaiFeng.,Deng XiGuang.,Yang JiChao.,...&Deng ChengLong.(2019).Rock magnetism of deep-sea sediments at Caiwei Guyot, Magellan seamounts of Northwest Pacific and its significance to abyssal environmental changes.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,62(8),3067-3077.
MLA	Lin Zhen,et al."Rock magnetism of deep-sea sediments at Caiwei Guyot, Magellan seamounts of Northwest Pacific and its significance to abyssal environmental changes".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 62.8(2019):3067-3077.