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Rock magnetism of deep-sea sediments at Caiwei Guyot, Magellan seamounts of Northwest Pacific and its significance to abyssal environmental changes
Lin Zhen1,2; Yi Liang3; Wang HaiFeng4; Deng XiGuang4; Yang JiChao5; Fu TengFei6; Yu HongJun5; Xie Qiang1; Deng ChengLong2,7,8
2019-08-01
Source PublicationCHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN0001-5733
Volume62Issue:8Pages:3067-3077
Abstract

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.

KeywordNorthwest Pacific Caiwei Guyot Rock Magnetism Early Diagenesis Deep-sea Environmental Changes
DOI10.6038/cjg2019M0526
Indexed BySCI
Language英语
WOS KeywordMarine-sediments ; Particle-systems ; Surface Vortex ; Loess Plateau ; Discrimination ; Diagenesis ; Erosion ; Climate ; Monsoon ; Eddies
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000480300600023
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.idsse.ac.cn/handle/183446/6941
Collection深海科学研究部_海洋环流观测与数值模拟研究室
Corresponding AuthorDeng ChengLong
Affiliation1.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
First Author AffilicationInstitute of Deep-sea Science and Engineering,CAS
Recommended Citation
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.
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